| Transactions |
| Date | Team | Player | Type | OthTm | EffDate | When |
| 4/7/1987 | MIL | Hengel | Promoted to active roster | | | Before |
| 4/7/1987 | MIL | Kelly | Demoted to reserve roster | | | Before |
| 4/8/1987 | CAR | Agosto | Promoted to active roster | | | Before |
| 4/8/1987 | CAR | Boston | Demoted to reserve roster | | | Before |
| 4/8/1987 | CAR | Davis | Demoted to reserve roster | | | Before |
| 4/8/1987 | CAR | Garner | Promoted to active roster | | | Before |
| 4/8/1987 | CAR | Hinzo | Demoted to reserve roster | | | Before |
| 4/8/1987 | CAR | Noles | Demoted to reserve roster | | | Before |
| 4/8/1987 | CAR | Pagnozzi | Promoted to active roster | | | Before |
| 4/8/1987 | CAR | Powell | Promoted to active roster | | | Before |
| 4/8/1987 | CAR | Randolph | Demoted to reserve roster | | | Before |
| 4/8/1987 | CAR | Treadway | Promoted to active roster | | | Before |
| 4/8/1987 | CAR | Trevino | Demoted to reserve roster | | | Before |
| 4/8/1987 | CAR | Wynne | Promoted to active roster | | | Before |
| 4/8/1987 | COL | Andujar | Promoted to active roster | | | Before |
| 4/8/1987 | COL | Nixon | Demoted to reserve roster | | | Before |
| 4/8/1987 | EBS | Lazorko | Demoted to reserve roster | | | Before |
| 4/8/1987 | EBS | McCaskill | Promoted to active roster | | | Before |
| 4/8/1987 | IAC | Lindeman | Promoted to active roster | | | Before |
| 4/8/1987 | IAC | McClendon | Demoted to reserve roster | | | Before |
| 4/8/1987 | IAC | Mirabella | Promoted to active roster | | | Before |
| 4/8/1987 | IAC | Sellers | Demoted to reserve roster | | | Before |
| 4/9/1987 | EBS | Lazorko | Demoted to reserve roster | | | Before |
| 4/9/1987 | EBS | Lazorko | Promoted to active roster | | | Before |
| 4/9/1987 | EBS | Stanicek | Promoted to active roster | | | Before |
| 4/9/1987 | EBS | Venable | Demoted to reserve roster | | | Before |
| 4/14/1987 | CAR | Boston | Promoted to active roster | | | Before |
| 4/14/1987 | CAR | Davis | Promoted to active roster | | | Before |
| 4/14/1987 | CAR | Garner | Demoted to reserve roster | | | Before |
| 4/14/1987 | CAR | Hinzo | Promoted to active roster | | | Before |
| 4/14/1987 | CAR | Noles | Promoted to active roster | | | Before |
| 4/14/1987 | CAR | Pagnozzi | Demoted to reserve roster | | | Before |
| 4/14/1987 | CAR | Powell | Demoted to reserve roster | | | Before |
| 4/14/1987 | CAR | Randolph | Promoted to active roster | | | Before |
| 4/14/1987 | CAR | Rayford | Promoted to active roster | | | Before |
| 4/14/1987 | CAR | Salazar | Demoted to reserve roster | | | Before |
| 4/14/1987 | CAR | Treadway | Demoted to reserve roster | | | Before |
| 4/14/1987 | CAR | Wynne | Demoted to reserve roster | | | Before |
| 4/14/1987 | EBS | Cotto | Promoted to active roster | | | Before |
| 4/14/1987 | EBS | Johnson | Demoted to reserve roster | | | Before |
| 4/14/1987 | EBS | Lazorko | Promoted to active roster | | | Before |
| 4/14/1987 | EBS | Maddux | Demoted to reserve roster | | | Before |
| 4/14/1987 | EBS | Maddux | Promoted to active roster | | | Before |
| 4/14/1987 | EBS | Maddux | Promoted to active roster | | | Before |
| 4/14/1987 | EBS | McCaskill | Demoted to reserve roster | | | Before |
| 4/14/1987 | EBS | Nichols | Demoted to reserve roster | | | Before |
| 4/14/1987 | EBS | Niekro | Demoted to reserve roster | | | Before |
| 4/14/1987 | EBS | Niekro | Promoted to active roster | | | Before |
| 4/14/1987 | IAC | Lindeman | Demoted to reserve roster | | | Before |
| 4/14/1987 | IAC | McClendon | Promoted to active roster | | | Before |
| 4/14/1987 | ROC | Benedict | Demoted to reserve roster | | | Before |
| 4/14/1987 | ROC | Stoddard | Promoted to active roster | | | Before |
| 4/15/1987 | BCB | Hillegas | Demoted to reserve roster | | | Before |
| 4/15/1987 | FRA | Hearn | Promoted to active roster | | | Before |
| 4/15/1987 | FRA | Jones | Promoted to active roster | | | Before |
| 4/15/1987 | FRA | Laudner | Demoted to reserve roster | | | Before |
| 4/15/1987 | FRA | McRae | Promoted to active roster | | | Before |
| 4/15/1987 | FRA | Searage | Promoted to active roster | | | Before |
| 4/15/1987 | FRA | Sebra | Demoted to reserve roster | | | Before |
| 4/15/1987 | FRA | Smalley | Demoted to reserve roster | | | Before |
| 4/15/1987 | FRA | Wilson | Demoted to reserve roster | | | Before |
| 4/21/1987 | BCB | Wells | Promoted to active roster | | | Before |
| 4/21/1987 | BRM | Boone | Demoted to reserve roster | | | Before |
| 4/21/1987 | BRM | Melvin | Promoted to active roster | | | Before |
| 4/21/1987 | FLU | Hoffman | Demoted to reserve roster | | | Before |
| 4/21/1987 | FLU | Lyons | Demoted to reserve roster | | | Before |
| 4/21/1987 | FLU | Wynegar | Promoted to active roster | | | Before |
| 4/22/1987 | CAR | Agosto | Demoted to reserve roster | | | Before |
| 4/22/1987 | CAR | Hinzo | Demoted to reserve roster | | | Before |
| 4/22/1987 | CAR | Powell | Promoted to active roster | | | Before |
| 4/22/1987 | CAR | Rayford | Demoted to reserve roster | | | Before |
| 4/22/1987 | CAR | Salazar | Promoted to active roster | | | Before |
| 4/22/1987 | CAR | Trevino | Promoted to active roster | | | Before |
| 4/22/1987 | COL | Cadaret | Promoted to active roster | | | Before |
| 4/22/1987 | COL | Grubb | Promoted to active roster | | | Before |
| 4/22/1987 | COL | Habyan | Demoted to reserve roster | | | Before |
| 4/22/1987 | COL | Henderson | Demoted to reserve roster | | | Before |
| 4/22/1987 | EBS | Maddux | Demoted to reserve roster | | | Before |
| 4/22/1987 | EBS | McCaskill | Promoted to active roster | | | Before |
| 4/22/1987 | FRA | Childress | Demoted to reserve roster | | | Before |
| 4/22/1987 | FRA | Dayett | Demoted to reserve roster | | | Before |
| 4/22/1987 | FRA | Gerhart | Promoted to active roster | | | Before |
| 4/22/1987 | FRA | Searage | Promoted to active roster | | | Before |
| 4/22/1987 | IAC | McClendon | Demoted to reserve roster | | | Before |
| 4/22/1987 | IAC | Sellers | Promoted to active roster | | | Before |
| 4/28/1987 | CAR | Boston | Demoted to reserve roster | | | Before |
| 4/28/1987 | CAR | Garner | Promoted to active roster | | | Before |
| 4/28/1987 | CAR | Hinzo | Promoted to active roster | | | Before |
| 4/28/1987 | CAR | Powell | Demoted to reserve roster | | | Before |
| 4/28/1987 | CAR | Rayford | Promoted to active roster | | | Before |
| 4/28/1987 | CAR | Salazar | Demoted to reserve roster | | | Before |
| 4/28/1987 | CAR | Trevino | Demoted to reserve roster | | | Before |
| 4/28/1987 | CAR | Wynne | Promoted to active roster | | | Before |
| 4/28/1987 | COL | Brookens | Demoted to reserve roster | | | Before |
| 4/28/1987 | COL | Griffin | Promoted to active roster | | | Before |
| 4/28/1987 | COL | Holton | Demoted to reserve roster | | | Before |
| 4/28/1987 | COL | Johnson | Promoted to active roster | | | Before |
| 4/28/1987 | COL | Nixon | Promoted to active roster | | | Before |
| 4/28/1987 | COL | Youmans | Demoted to reserve roster | | | Before |
| 4/28/1987 | CRF | Henderson | Promoted to active roster | | | Before |
| 4/28/1987 | CRF | Nieto | Demoted to reserve roster | | | Before |
| 4/28/1987 | EBS | Kelly | Promoted to active roster | | | Before |
| 4/28/1987 | EBS | McCaskill | Demoted to reserve roster | | | Before |
| 4/29/1987 | BRM | Gideon | Promoted to active roster | | | Before |
| 4/29/1987 | BRM | Stoddard | Demoted to reserve roster | | | Before |
| 4/29/1987 | CRF | Reuss | Demoted to reserve roster | | | Before |
| 4/29/1987 | CRF | Soto | Promoted to active roster | | | Before |
| 4/29/1987 | FLU | Hoffman | Promoted to active roster | | | Before |
| 4/29/1987 | FLU | Kilgus | Promoted to active roster | | | Before |
| 4/29/1987 | FLU | Langston | Demoted to reserve roster | | | Before |
| 4/29/1987 | FLU | Viola | Demoted to reserve roster | | | Before |
| 4/29/1987 | LER | Davidson | Promoted to active roster | | | Before |
| 4/29/1987 | LER | Mack | Demoted to reserve roster | | | Before |
| 5/5/1987 | FLU | Hoffman | Demoted to reserve roster | | | Before |
| 5/5/1987 | FLU | Howell | Promoted to active roster | | | Before |
| 5/5/1987 | FLU | Kilgus | Demoted to reserve roster | | | Before |
| 5/5/1987 | FLU | Langston | Promoted to active roster | | | Before |
| 5/5/1987 | FLU | Portugal | Demoted to reserve roster | | | Before |
| 5/5/1987 | FLU | Viola | Promoted to active roster | | | Before |
| 5/6/1987 | CAR | Hinzo | Demoted to reserve roster | | | Before |
| 5/6/1987 | CAR | Lemon | Demoted to reserve roster | | | Before |
| 5/6/1987 | CAR | Rayford | Demoted to reserve roster | | | Before |
| 5/6/1987 | CAR | Salazar | Promoted to active roster | | | Before |
| 5/6/1987 | CAR | Treadway | Promoted to active roster | | | Before |
| 5/6/1987 | CAR | Trevino | Promoted to active roster | | | Before |
| 5/6/1987 | CLE | Aase | Promoted to active roster | | | Before |
| 5/6/1987 | CLE | Howe | Demoted to reserve roster | | | Before |
| 5/6/1987 | EBS | Dixon | Demoted to reserve roster | | | Before |
| 5/6/1987 | EBS | Johnson | Promoted to active roster | | | Before |
| 5/6/1987 | EBS | Kelly | Demoted to reserve roster | | | Before |
| 5/6/1987 | EBS | Lazorko | Demoted to reserve roster | | | Before |
| 5/6/1987 | EBS | Lazorko | Promoted to active roster | | | Before |
| 5/6/1987 | EBS | McCaskill | Promoted to active roster | | | Before |
| 5/12/1987 | CAR | Boston | Promoted to active roster | | | Before |
| 5/12/1987 | CAR | Davis | Demoted to reserve roster | | | Before |
| 5/12/1987 | CAR | Hinzo | Promoted to active roster | | | Before |
| 5/12/1987 | CAR | Lemon | Promoted to active roster | | | Before |
| 5/12/1987 | CAR | Martinez | Demoted to reserve roster | | | Before |
| 5/12/1987 | CAR | Pagnozzi | Promoted to active roster | | | Before |
| 5/12/1987 | CAR | Powell | Promoted to active roster | | | Before |
| 5/12/1987 | CAR | Treadway | Demoted to reserve roster | | | Before |
| 5/12/1987 | CAR | Trevino | Demoted to reserve roster | | | Before |
| 5/12/1987 | CAR | Wynne | Demoted to reserve roster | | | Before |
| 5/12/1987 | EBS | Dernier | Demoted to reserve roster | | | Before |
| 5/12/1987 | EBS | Maddux | Promoted to active roster | | | Before |
| 5/12/1987 | EBS | McCaskill | Demoted to reserve roster | | | Before |
| 5/12/1987 | EBS | Nichols | Promoted to active roster | | | Before |
| 5/12/1987 | HAT | Barker | Demoted to reserve roster | | | Before |
| 5/12/1987 | HAT | Bosley | Promoted to active roster | | | Before |
| 5/12/1987 | HAT | Davis | Promoted to active roster | | | Before |
| 5/12/1987 | HAT | Hendrick | Demoted to reserve roster | | | Before |
| 5/12/1987 | ROC | Snell | Promoted to active roster | | | Before |
| 5/12/1987 | ROC | Stoddard | Demoted to reserve roster | | | Before |
| 5/13/1987 | BHS | Manning | Promoted to active roster | | | Before |
| 5/13/1987 | BHS | Ojeda | Demoted to reserve roster | | | Before |
| 5/13/1987 | HAT | Barker | Released | | | Before |
| 5/13/1987 | HAT | Zuvella | Signed | | | Before |
| 5/13/1987 | HAT | Zuvella | Demoted to reserve roster | | | Before |
| 5/13/1987 | WWS | Brooks | Promoted to active roster | | | Before |
| 5/13/1987 | WWS | Owen | Demoted to reserve roster | | | Before |
| 5/18/1987 | CAR | Agosto | Promoted to active roster | | | Before |
| 5/18/1987 | CAR | Boston | Demoted to reserve roster | | | Before |
| 5/18/1987 | CAR | Lemon | Demoted to reserve roster | | | Before |
| 5/18/1987 | CAR | Martinez | Promoted to active roster | | | Before |
| 5/18/1987 | CAR | Pagnozzi | Demoted to reserve roster | | | Before |
| 5/18/1987 | CAR | Powell | Demoted to reserve roster | | | Before |
| 5/18/1987 | CAR | Trevino | Promoted to active roster | | | Before |
| 5/18/1987 | CAR | Wynne | Promoted to active roster | | | Before |
| 5/18/1987 | EBS | Belcher | Promoted to active roster | | | Before |
| 5/18/1987 | EBS | Dixon | Promoted to active roster | | | Before |
| 5/18/1987 | EBS | Honeycutt | Demoted to reserve roster | | | Before |
| 5/18/1987 | EBS | Johnson | Demoted to reserve roster | | | Before |
| 5/18/1987 | EBS | Niekro | Demoted to reserve roster | | | Before |
| 5/18/1987 | EBS | Wills | Promoted to active roster | | | Before |
| 5/18/1987 | FRA | Arnsberg | Acquired via trade | IAC | | After |
| 5/18/1987 | FRA | Mirabella | Acquired via trade | IAC | | After |
| 5/18/1987 | FRA | Niedenfuer | Traded away | IAC | | After |
| 5/18/1987 | IAC | Arnsberg | Traded away | FRA | | After |
| 5/18/1987 | IAC | Mirabella | Traded away | FRA | | After |
| 5/18/1987 | IAC | Niedenfuer | Acquired via trade | FRA | | After |
| 5/18/1987 | IAC | Palmer | Acquired via trade | OTT | | After |
| 5/18/1987 | MIL | Bielecki | Demoted to reserve roster | | | Before |
| 5/18/1987 | MIL | Mitchell | Promoted to active roster | | | Before |
| 5/18/1987 | OTT | Palmer | Traded away | IAC | | After |
| 5/20/1987 | BRM | Collins | Promoted to active roster | | | Before |
| 5/20/1987 | BRM | Comstock | Demoted to reserve roster | | | Before |
| 5/20/1987 | BRM | Quisenberry | Demoted to reserve roster | | | Before |
| 5/20/1987 | BRM | Stapleton | Promoted to active roster | | | Before |
| 5/20/1987 | FRA | Childress | Demoted to reserve roster | | | Before |
| 5/20/1987 | FRA | Childress | Promoted to active roster | | | Before |
| 5/20/1987 | FRA | Dayett | Demoted to reserve roster | | | Before |
| 5/20/1987 | FRA | Lopes | Released | | | Before |
| 5/20/1987 | FRA | McRae | Demoted to reserve roster | | | Before |
| 5/20/1987 | FRA | Meacham | Promoted to active roster | | | Before |
| 5/20/1987 | FRA | Mirabella | Demoted to reserve roster | | | Before |
| 5/20/1987 | FRA | Mirabella | Promoted to active roster | | | Before |
| 5/20/1987 | IAC | Hairston | Signed | | | Before |
| 5/20/1987 | IAC | Niedenfuer | Promoted to active roster | | | Before |
| 5/20/1987 | IAC | Ritchie | Demoted to reserve roster | | | Before |
| 5/20/1987 | IAC | Sellers | Demoted to reserve roster | | | Before |
| 5/20/1987 | IAC | Vande Berg | Released | | | Before |
| 5/20/1987 | MIL | Bielecki | Promoted to active roster | | | Before |
| 5/20/1987 | MIL | Bielecki | Placed on Injured List | | 5/19/1987 | Before |
| 5/20/1987 | OTT | Haas | Signed | | | Before |
| 5/20/1987 | ROC | Cowley | Released | | | Before |
| 5/20/1987 | ROC | Ryal | Signed | | | Before |
| 5/20/1987 | ROC | Ryal | Demoted to reserve roster | | | Before |
| 5/20/1987 | WWS | Assenmacher | Demoted to reserve roster | | | Before |
| 5/20/1987 | WWS | Assenmacher | Promoted to active roster | | | Before |
| 5/25/1987 | BRM | Boone | Traded away | NYM | | After |
| 5/25/1987 | BRM | Butera | Acquired via trade | NYM | | After |
| 5/25/1987 | BRM | Gullickson | Traded away | IAC | | After |
| 5/25/1987 | BRM | Gullickson | Acquired via trade | IAC | | After |
| 5/25/1987 | BRM | Gullickson | Acquired via trade | IAC | | After |
| 5/25/1987 | BRM | Hernandez | Traded away | IAC | | After |
| 5/25/1987 | BRM | Hernandez | Traded away | IAC | | After |
| 5/25/1987 | BRM | Hernandez | Acquired via trade | IAC | | After |
| 5/25/1987 | BRM | Hough | Traded away | IAC | | After |
| 5/25/1987 | BRM | Hough | Traded away | IAC | | After |
| 5/25/1987 | BRM | Hough | Acquired via trade | IAC | | After |
| 5/25/1987 | BRM | Magrane | Traded away | IAC | | After |
| 5/25/1987 | BRM | Magrane | Acquired via trade | IAC | | After |
| 5/25/1987 | BRM | Magrane | Acquired via trade | IAC | | After |
| 5/25/1987 | BRM | Parker | Acquired via trade | NYM | | After |
| 5/25/1987 | BRM | Quisenberry | Traded away | IAC | | After |
| 5/25/1987 | BRM | Quisenberry | Traded away | IAC | | After |
| 5/25/1987 | BRM | Quisenberry | Acquired via trade | IAC | | After |
| 5/25/1987 | BRM | Smith | Traded away | IAC | | After |
| 5/25/1987 | BRM | Smith | Acquired via trade | IAC | | After |
| 5/25/1987 | BRM | Smith | Acquired via trade | IAC | | After |
| 5/25/1987 | BRM | Stapleton | Traded away | IAC | | After |
| 5/25/1987 | BRM | Stoddard | Traded away | NYM | | After |
| 5/25/1987 | BRM | Wilkinson | Traded away | IAC | | After |
| 5/25/1987 | BRM | Wilkinson | Acquired via trade | IAC | | After |
| 5/25/1987 | BRM | Wilkinson | Acquired via trade | IAC | | After |
| 5/25/1987 | IAC | Magrane | Demoted to reserve roster | | | Before |
| 5/25/1987 | IAC | O'Neal | Promoted to active roster | | | Before |
| 5/25/1987 | IAC | Gullickson | Traded away | BRM | | After |
| 5/25/1987 | IAC | Gullickson | Traded away | BRM | | After |
| 5/25/1987 | IAC | Gullickson | Acquired via trade | BRM | | After |
| 5/25/1987 | IAC | Hernandez | Traded away | BRM | | After |
| 5/25/1987 | IAC | Hernandez | Acquired via trade | BRM | | After |
| 5/25/1987 | IAC | Hernandez | Acquired via trade | BRM | | After |
| 5/25/1987 | IAC | Hough | Traded away | BRM | | After |
| 5/25/1987 | IAC | Hough | Acquired via trade | BRM | | After |
| 5/25/1987 | IAC | Hough | Acquired via trade | BRM | | After |
| 5/25/1987 | IAC | Magrane | Traded away | BRM | | After |
| 5/25/1987 | IAC | Magrane | Traded away | BRM | | After |
| 5/25/1987 | IAC | Magrane | Acquired via trade | BRM | | After |
| 5/25/1987 | IAC | Quisenberry | Traded away | BRM | | After |
| 5/25/1987 | IAC | Quisenberry | Acquired via trade | BRM | | After |
| 5/25/1987 | IAC | Quisenberry | Acquired via trade | BRM | | After |
| 5/25/1987 | IAC | Smith | Traded away | BRM | | After |
| 5/25/1987 | IAC | Smith | Traded away | BRM | | After |
| 5/25/1987 | IAC | Smith | Acquired via trade | BRM | | After |
| 5/25/1987 | IAC | Stapleton | Acquired via trade | BRM | | After |
| 5/25/1987 | IAC | Wilkinson | Traded away | BRM | | After |
| 5/25/1987 | IAC | Wilkinson | Traded away | BRM | | After |
| 5/25/1987 | IAC | Wilkinson | Acquired via trade | BRM | | After |
| 5/25/1987 | NYM | Boone | Acquired via trade | BRM | | After |
| 5/25/1987 | NYM | Butera | Traded away | BRM | | After |
| 5/25/1987 | NYM | Parker | Traded away | BRM | | After |
| 5/25/1987 | NYM | Stoddard | Acquired via trade | BRM | | After |
| 5/26/1987 | BCB | Palacios | Placed on Injured List | | 5/26/1987 | Before |
| 5/26/1987 | BRM | Booker | Demoted to reserve roster | | | Before |
| 5/26/1987 | BRM | Booker | Promoted to active roster | | | Before |
| 5/26/1987 | BRM | Comstock | Promoted to active roster | | | Before |
| 5/26/1987 | BRM | Hernandez | Demoted to reserve roster | | | Before |
| 5/26/1987 | BRM | Hough | Demoted to reserve roster | | | Before |
| 5/26/1987 | BRM | Pena | Demoted to reserve roster | | | Before |
| 5/26/1987 | COL | Andujar | Demoted to reserve roster | | | Before |
| 5/26/1987 | COL | Brookens | Promoted to active roster | | | Before |
| 5/26/1987 | COL | Galarraga | Demoted to reserve roster | | | Before |
| 5/26/1987 | COL | Habyan | Promoted to active roster | | | Before |
| 5/26/1987 | COL | Henderson | Promoted to active roster | | | Before |
| 5/26/1987 | COL | Holton | Promoted to active roster | | | Before |
| 5/26/1987 | COL | Johnson | Demoted to reserve roster | | | Before |
| 5/26/1987 | COL | McGregor | Demoted to reserve roster | | | Before |
| 5/26/1987 | COL | Oester | Demoted to reserve roster | | | Before |
| 5/26/1987 | COL | Phillips | Demoted to reserve roster | | | Before |
| 5/26/1987 | COL | Puleo | Promoted to active roster | | | Before |
| 5/26/1987 | COL | Youmans | Promoted to active roster | | | Before |
| 5/26/1987 | CRF | Ramos | Placed on Injured List | | 5/26/1987 | Before |
| 5/26/1987 | EBS | Dunne | Demoted to reserve roster | | | Before |
| 5/26/1987 | EBS | Honeycutt | Promoted to active roster | | | Before |
| 5/26/1987 | EBS | Johnson | Promoted to active roster | | | Before |
| 5/26/1987 | EBS | Maddux | Demoted to reserve roster | | | Before |
| 5/26/1987 | EBS | McCaskill | Promoted to active roster | | | Before |
| 5/26/1987 | EBS | Wills | Demoted to reserve roster | | | Before |
| 5/26/1987 | FLU | Wynegar | Placed on Injured List | | 5/26/1987 | Before |
| 5/26/1987 | HAT | Arnold | Released | | | Before |
| 5/26/1987 | HAT | Bosley | Demoted to reserve roster | | | Before |
| 5/26/1987 | HAT | Van Gorder | Released | | | Before |
| 5/26/1987 | HAT | Van Gorder | Signed | | | Before |
| 5/26/1987 | HAT | Vande Berg | Signed | | | Before |
| 5/26/1987 | HAT | Zuvella | Promoted to active roster | | | Before |
| 5/26/1987 | IAC | Heathcock | Demoted to reserve roster | | | Before |
| 5/26/1987 | IAC | Quisenberry | Promoted to active roster | | | Before |
| 5/26/1987 | IAC | Stapleton | Demoted to reserve roster | | | Before |
| 5/26/1987 | MIL | Christensen | Promoted to active roster | | | Before |
| 5/26/1987 | MIL | Roenicke | Demoted to reserve roster | | | Before |
| 5/26/1987 | OTT | Burleson | Demoted to reserve roster | | | Before |
| 5/26/1987 | OTT | Liriano | Promoted to active roster | | | Before |
| 5/26/1987 | OTT | Mason | Promoted to active roster | | | Before |
| 5/26/1987 | OTT | Reed | Demoted to reserve roster | | | Before |
| 5/26/1987 | OTT | Stanley | Promoted to active roster | | | Before |
| 5/31/1987 | CAR | Agosto | Demoted to reserve roster | | | Before |
| 5/31/1987 | CAR | Boston | Promoted to active roster | | | Before |
| 5/31/1987 | CAR | Lemon | Promoted to active roster | | | Before |
| 5/31/1987 | CAR | Powell | Promoted to active roster | | | Before |
| 5/31/1987 | CAR | Salazar | Demoted to reserve roster | | | Before |
| 5/31/1987 | CAR | Wynne | Demoted to reserve roster | | | Before |
| 5/31/1987 | EBS | Belcher | Demoted to reserve roster | | | Before |
| 5/31/1987 | EBS | Dunne | Promoted to active roster | | | Before |
| 5/31/1987 | EBS | Johnson | Demoted to reserve roster | | | Before |
| 5/31/1987 | EBS | McCaskill | Demoted to reserve roster | | | Before |
| 5/31/1987 | EBS | Niekro | Promoted to active roster | | | Before |
| 5/31/1987 | EBS | Wills | Demoted to reserve roster | | | Before |
| 5/31/1987 | EBS | Wills | Promoted to active roster | | | Before |
| 5/31/1987 | EBS | Wills | Promoted to active roster | | | Before |
| 5/31/1987 | FLU | Kilgus | Promoted to active roster | | | Before |
| 5/31/1987 | FLU | Paciorek | Demoted to reserve roster | | | Before |
| 5/31/1987 | HAT | Hendrick | Promoted to active roster | | | Before |
| 5/31/1987 | HAT | O'Neill | Demoted to reserve roster | | | Before |
| 6/2/1987 | BRM | Booker | Promoted to active roster | | | Before |
| 6/2/1987 | BRM | Noce | Demoted to reserve roster | | | Before |
| 6/2/1987 | BRM | Noce | Promoted to active roster | | | Before |
| 6/2/1987 | BRM | Pedrique | Demoted to reserve roster | | | Before |
| 6/2/1987 | CAR | Pagnozzi | Promoted to active roster | | | Before |
| 6/2/1987 | CAR | Trevino | Demoted to reserve roster | | | Before |
| 6/2/1987 | FLU | Landreaux | Signed | | | Before |
| 6/2/1987 | FLU | Nettles | Signed | | | Before |
| 6/2/1987 | FLU | Nielsen | Signed | | | Before |
| 6/2/1987 | FLU | Paciorek | Released | | | Before |
| 6/2/1987 | FLU | Trujillo | Released | | | Before |
| 6/2/1987 | FLU | Wynegar | Released | | | Before |
| 6/2/1987 | FLU | Wynegar | Activated from Injured List | | | Before |
| 6/2/1987 | NYM | Boone | Promoted to active roster | | | Before |
| 6/2/1987 | NYM | Clark | Demoted to reserve roster | | | Before |
| 6/2/1987 | NYM | Dempsey | Demoted to reserve roster | | | Before |
| 6/2/1987 | NYM | Stoddard | Promoted to active roster | | | Before |
| 6/2/1987 | OTT | Heep | Signed | | | Before |
| 6/2/1987 | OTT | Milner | Released | | | Before |
| 6/2/1987 | SMV | Bergman | Demoted to reserve roster | | | Before |
| 6/2/1987 | SMV | Gallagher | Promoted to active roster | | | Before |
| 6/7/1987 | BRM | Booker | Demoted to reserve roster | | | Before |
| 6/7/1987 | BRM | Jackson | Demoted to reserve roster | | | Before |
| 6/7/1987 | BRM | Magrane | Promoted to active roster | | | Before |
| 6/7/1987 | BRM | Olwine | Demoted to reserve roster | | | Before |
| 6/7/1987 | BRM | Pedrique | Promoted to active roster | | | Before |
| 6/7/1987 | BRM | Pena | Promoted to active roster | | | Before |
| 6/7/1987 | CAR | Bailey | Signed | | | Before |
| 6/7/1987 | CAR | Boston | Demoted to reserve roster | | | Before |
| 6/7/1987 | CAR | Davis | Promoted to active roster | | | Before |
| 6/7/1987 | CAR | Garner | Released | | | Before |
| 6/7/1987 | CAR | Garner | Demoted to reserve roster | | | Before |
| 6/7/1987 | CAR | Pagnozzi | Demoted to reserve roster | | | Before |
| 6/7/1987 | CAR | Powell | Demoted to reserve roster | | | Before |
| 6/7/1987 | CAR | Salazar | Promoted to active roster | | | Before |
| 6/7/1987 | CAR | Trevino | Promoted to active roster | | | Before |
| 6/7/1987 | CAR | Wynne | Promoted to active roster | | | Before |
| 6/7/1987 | CLE | Clark | Promoted to active roster | | | Before |
| 6/7/1987 | FRA | Lucas | Traded away | IAC | | After |
| 6/7/1987 | FRA | Ritchie | Acquired via trade | IAC | | After |
| 6/7/1987 | IAC | Durham | Traded away | ROC | | After |
| 6/7/1987 | IAC | Evans | Acquired via trade | ROC | | After |
| 6/7/1987 | IAC | Gossage | Acquired via trade | ROC | | After |
| 6/7/1987 | IAC | Hawkins | Traded away | ROC | | After |
| 6/7/1987 | IAC | Lindeman | Traded away | ROC | | After |
| 6/7/1987 | IAC | Lucas | Acquired via trade | FRA | | After |
| 6/7/1987 | IAC | Niedenfuer | Traded away | ROC | | After |
| 6/7/1987 | IAC | Ritchie | Traded away | FRA | | After |
| 6/7/1987 | IAC | Roenicke | Acquired via trade | ROC | | After |
| 6/7/1987 | IAC | Thurman | Acquired via trade | ROC | | After |
| 6/7/1987 | ROC | Durham | Acquired via trade | IAC | | After |
| 6/7/1987 | ROC | Evans | Traded away | IAC | | After |
| 6/7/1987 | ROC | Gossage | Traded away | IAC | | After |
| 6/7/1987 | ROC | Hawkins | Acquired via trade | IAC | | After |
| 6/7/1987 | ROC | Lindeman | Acquired via trade | IAC | | After |
| 6/7/1987 | ROC | Niedenfuer | Acquired via trade | IAC | | After |
| 6/7/1987 | ROC | Roenicke | Traded away | IAC | | After |
| 6/7/1987 | ROC | Thurman | Traded away | IAC | | After |
| 6/8/1987 | CLE | Aase | Placed on Injured List | | 6/8/1987 | Before |
| 6/8/1987 | CRF | Hoffman | Promoted to active roster | | | Before |
| 6/8/1987 | CRF | Soto | Placed on Injured List | | 6/8/1987 | Before |
| 6/8/1987 | DAY | Crews | Placed on Injured List | | 6/8/1987 | Before |
| 6/8/1987 | EBS | James | Demoted to reserve roster | | | Before |
| 6/8/1987 | EBS | Johnson | Promoted to active roster | | | Before |
| 6/8/1987 | EBS | Kelly | Promoted to active roster | | | Before |
| 6/8/1987 | EBS | Wills | Demoted to reserve roster | | | Before |
| 6/8/1987 | FRA | Gerhart | Promoted to active roster | | | Before |
| 6/8/1987 | FRA | Hall | Demoted to reserve roster | | | Before |
| 6/8/1987 | FRA | Madlock | Demoted to reserve roster | | | Before |
| 6/8/1987 | FRA | Ritchie | Promoted to active roster | | | Before |
| 6/8/1987 | FRA | Smalley | Promoted to active roster | | | Before |
| 6/8/1987 | IAC | Allanson | Demoted to reserve roster | | | Before |
| 6/8/1987 | IAC | Benzinger | Demoted to reserve roster | | | Before |
| 6/8/1987 | IAC | Ford | Demoted to reserve roster | | | Before |
| 6/8/1987 | IAC | McClendon | Promoted to active roster | | | Before |
| 6/8/1987 | IAC | Roenicke | Demoted to reserve roster | | | Before |
| 6/8/1987 | IAC | Roenicke | Promoted to active roster | | | Before |
| 6/8/1987 | IAC | Thurman | Promoted to active roster | | | Before |
| 6/8/1987 | LER | Toliver | Placed on Injured List | | 6/8/1987 | Before |
| 6/8/1987 | OTT | Swindell | Demoted to reserve roster | | | Before |
| 6/8/1987 | ROC | Bell | Demoted to reserve roster | | | Before |
| 6/8/1987 | ROC | Lindeman | Promoted to active roster | | | Before |
| 6/8/1987 | ROC | Ryal | Promoted to active roster | | | Before |
| 6/13/1987 | BCB | Miller | Demoted to reserve roster | | | Before |
| 6/13/1987 | BCB | Moore | Promoted to active roster | | | Before |
| 6/13/1987 | BHS | Allen | Traded away | BRM | | After |
| 6/13/1987 | BHS | Wilkinson | Acquired via trade | BRM | | After |
| 6/13/1987 | BRM | Allen | Acquired via trade | BHS | | After |
| 6/13/1987 | BRM | Wilkinson | Traded away | BHS | | After |
| 6/13/1987 | EBS | Johnson | Demoted to reserve roster | | | Before |
| 6/13/1987 | EBS | Maddux | Promoted to active roster | | | Before |
| 6/13/1987 | FLU | Landreaux | Demoted to reserve roster | | | Before |
| 6/13/1987 | FLU | Mazzilli | Demoted to reserve roster | | | Before |
| 6/13/1987 | FLU | Tewksbury | Demoted to reserve roster | | | Before |
| 6/13/1987 | HAT | Hendrick | Demoted to reserve roster | | | Before |
| 6/13/1987 | HAT | O'Neill | Promoted to active roster | | | Before |
| 6/13/1987 | HAT | Youngblood | Promoted to active roster | | | Before |
| 6/13/1987 | HAT | Zuvella | Demoted to reserve roster | | | Before |
| 6/13/1987 | ROC | Snell | Demoted to reserve roster | | | Before |
| 6/15/1987 | CAR | Bailey | Demoted to reserve roster | | | Before |
| 6/15/1987 | CAR | Boston | Promoted to active roster | | | Before |
| 6/15/1987 | CAR | Wynne | Demoted to reserve roster | | | Before |
| 6/15/1987 | DAY | Glavine | Promoted to active roster | | | Before |
| 6/15/1987 | NYM | Nolte | Placed on Injured List | | 6/14/1987 | Before |
| 6/20/1987 | EBS | Belcher | Promoted to active roster | | | Before |
| 6/20/1987 | EBS | Dernier | Promoted to active roster | | | Before |
| 6/20/1987 | EBS | Honeycutt | Demoted to reserve roster | | | Before |
| 6/20/1987 | EBS | James | Promoted to active roster | | | Before |
| 6/20/1987 | EBS | Kelly | Demoted to reserve roster | | | Before |
| 6/20/1987 | EBS | Maddux | Demoted to reserve roster | | | Before |
| 6/20/1987 | EBS | McCaskill | Promoted to active roster | | | Before |
| 6/20/1987 | EBS | Nichols | Demoted to reserve roster | | | Before |
| 6/20/1987 | IAC | Benzinger | Promoted to active roster | | | Before |
| 6/20/1987 | IAC | Fisher | Demoted to reserve roster | | | Before |
| 6/20/1987 | IAC | Ford | Promoted to active roster | | | Before |
| 6/20/1987 | IAC | Heathcock | Promoted to active roster | | | Before |
| 6/20/1987 | IAC | O'Neal | Demoted to reserve roster | | | Before |
| 6/20/1987 | IAC | Roenicke | Demoted to reserve roster | | | Before |
| 6/20/1987 | IAC | Sellers | Promoted to active roster | | | Before |
| 6/20/1987 | IAC | Thurman | Demoted to reserve roster | | | Before |
| 6/21/1987 | BHS | Perez | Demoted to reserve roster | | | Before |
| 6/21/1987 | BHS | Wilkinson | Promoted to active roster | | | Before |
| 6/21/1987 | BRM | Allen | Promoted to active roster | | | Before |
| 6/21/1987 | BRM | Gullickson | Demoted to reserve roster | | | Before |
| 6/21/1987 | BRM | Olwine | Promoted to active roster | | | Before |
| 6/21/1987 | BRM | Wilkinson | Demoted to reserve roster | | | Before |
| 6/21/1987 | CRF | Reuss | Promoted to active roster | | | Before |
| 6/21/1987 | EBS | Kelly | Promoted to active roster | | | Before |
| 6/21/1987 | EBS | Kelly | Placed on Injured List | | 6/21/1987 | Before |
| 6/21/1987 | FRA | Castillo | Demoted to reserve roster | | | Before |
| 6/21/1987 | FRA | Dayett | Demoted to reserve roster | | | Before |
| 6/21/1987 | FRA | Hall | Promoted to active roster | | | Before |
| 6/21/1987 | FRA | Madlock | Promoted to active roster | | | Before |
| 6/21/1987 | NYM | Boyd | Promoted to active roster | | | Before |
| 6/26/1987 | FLU | Loynd | Demoted to reserve roster | | | Before |
| 6/26/1987 | ROC | Bell | Promoted to active roster | | | Before |
| 6/26/1987 | ROC | Forsch | Demoted to reserve roster | | | Before |
| 6/26/1987 | ROC | Snell | Promoted to active roster | | | Before |
| 6/26/1987 | SMV | Lee | Promoted to active roster | | | Before |
| 6/26/1987 | SMV | Ramirez | Demoted to reserve roster | | | Before |
| 6/28/1987 | BHS | Bonilla | Promoted to active roster | | | Before |
| 6/28/1987 | BHS | Browne | Demoted to reserve roster | | | Before |
| 6/28/1987 | BHS | Cerone | Demoted to reserve roster | | | Before |
| 6/28/1987 | BHS | Cerone | Promoted to active roster | | | Before |
| 6/28/1987 | BHS | Destrade | Promoted to active roster | | | Before |
| 6/28/1987 | BHS | Moore | Demoted to reserve roster | | | Before |
| 6/28/1987 | BHS | Ojeda | Promoted to active roster | | | Before |
| 6/28/1987 | BHS | Oquendo | Demoted to reserve roster | | | Before |
| 6/28/1987 | BHS | Sundberg | Demoted to reserve roster | | | Before |
| 6/28/1987 | BHS | Sundberg | Promoted to active roster | | | Before |
| 6/28/1987 | CAR | Agosto | Promoted to active roster | | | Before |
| 6/28/1987 | CAR | Bailey | Promoted to active roster | | | Before |
| 6/28/1987 | CAR | Davis | Demoted to reserve roster | | | Before |
| 6/28/1987 | CAR | Gott | Demoted to reserve roster | | | Before |
| 6/28/1987 | CAR | Martinez | Demoted to reserve roster | | | Before |
| 6/28/1987 | CAR | Powell | Promoted to active roster | | | Before |
| 6/28/1987 | CAR | Randolph | Demoted to reserve roster | | | Before |
| 6/28/1987 | CAR | Treadway | Promoted to active roster | | | Before |
| 6/28/1987 | CAR | Trevino | Demoted to reserve roster | | | Before |
| 6/28/1987 | CAR | Wynne | Promoted to active roster | | | Before |
| 6/28/1987 | CLE | Patterson | Promoted to active roster | | | Before |
| 6/28/1987 | CLE | Taylor | Promoted to active roster | | | Before |
| 6/28/1987 | CLE | Tudor | Demoted to reserve roster | | | Before |
| 6/28/1987 | COL | Grubb | Placed on Injured List | | 6/27/1987 | Before |
| 6/28/1987 | EBS | Belcher | Demoted to reserve roster | | | Before |
| 6/28/1987 | EBS | Honeycutt | Promoted to active roster | | | Before |
| 6/28/1987 | EBS | McCaskill | Demoted to reserve roster | | | Before |
| 6/28/1987 | EBS | Nichols | Promoted to active roster | | | Before |
| 6/28/1987 | EBS | Walker | Demoted to reserve roster | | | Before |
| 6/28/1987 | EBS | Walker | Promoted to active roster | | | Before |
| 6/28/1987 | FLU | Bochy | Signed | | | Before |
| 6/28/1987 | FLU | Griffey | Demoted to reserve roster | | | Before |
| 6/28/1987 | FLU | Howell | Demoted to reserve roster | | | Before |
| 6/28/1987 | FLU | Landreaux | Promoted to active roster | | | Before |
| 6/28/1987 | FLU | Loynd | Released | | | Before |
| 6/28/1987 | FLU | Smithson | Promoted to active roster | | | Before |
| 6/28/1987 | OTT | Mason | Placed on Injured List | | 6/27/1987 | Before |
| 6/28/1987 | ROC | Forsch | Promoted to active roster | | | Before |
| 6/28/1987 | ROC | Fraser | Demoted to reserve roster | | | Before |
| 6/28/1987 | SMV | Ramirez | Promoted to active roster | | | Before |
| 6/28/1987 | SMV | Ramirez | Placed on Injured List | | 6/27/1987 | Before |
| 7/3/1987 | BRM | Almon | Promoted to active roster | | | Before |
| 7/3/1987 | BRM | Collins | Demoted to reserve roster | | | Before |
| 7/3/1987 | CAR | Agosto | Demoted to reserve roster | | | Before |
| 7/3/1987 | CAR | Bailey | Demoted to reserve roster | | | Before |
| 7/3/1987 | CAR | Davis | Promoted to active roster | | | Before |
| 7/3/1987 | CAR | Gott | Promoted to active roster | | | Before |
| 7/3/1987 | CAR | Martinez | Promoted to active roster | | | Before |
| 7/3/1987 | CAR | Powell | Demoted to reserve roster | | | Before |
| 7/3/1987 | CAR | Randolph | Promoted to active roster | | | Before |
| 7/3/1987 | CAR | Rayford | Promoted to active roster | | | Before |
| 7/3/1987 | CAR | Treadway | Demoted to reserve roster | | | Before |
| 7/3/1987 | CAR | Wynne | Demoted to reserve roster | | | Before |
| 7/3/1987 | FLU | Griffey | Promoted to active roster | | | Before |
| 7/3/1987 | FLU | Howell | Promoted to active roster | | | Before |
| 7/3/1987 | FLU | Landreaux | Demoted to reserve roster | | | Before |
| 7/3/1987 | FLU | Smithson | Demoted to reserve roster | | | Before |
| 7/3/1987 | ROC | Forsch | Promoted to active roster | | | Before |
| 7/3/1987 | ROC | Hawkins | Demoted to reserve roster | | | Before |
| 7/4/1987 | BHS | Backman | Promoted to active roster | | | Before |
| 7/4/1987 | BHS | Bonilla | Demoted to reserve roster | | | Before |
| 7/4/1987 | BHS | Bonilla | Promoted to active roster | | | Before |
| 7/4/1987 | BHS | Brumley | Demoted to reserve roster | | | Before |
| 7/4/1987 | BHS | Ojeda | Placed on Injured List | | 7/4/1987 | Before |
| 7/4/1987 | BHS | Perez | Promoted to active roster | | | Before |
| 7/4/1987 | BLO | Bolton | Promoted to active roster | | | Before |
| 7/4/1987 | BLO | St.Claire | Demoted to reserve roster | | | Before |
| 7/4/1987 | EBS | Sheaffer | Signed | | | Before |
| 7/4/1987 | EBS | Walker | Released | | | Before |
| 7/4/1987 | FRA | Arnsberg | Promoted to active roster | | | Before |
| 7/4/1987 | FRA | Castillo | Demoted to reserve roster | | | Before |
| 7/4/1987 | FRA | Dayett | Demoted to reserve roster | | | Before |
| 7/4/1987 | FRA | Hall | Promoted to active roster | | | Before |
| 7/4/1987 | FRA | Madlock | Promoted to active roster | | | Before |
| 7/4/1987 | FRA | Mirabella | Demoted to reserve roster | | | Before |
| 7/4/1987 | IAC | Fisher | Promoted to active roster | | | Before |
| 7/4/1987 | IAC | Ford | Demoted to reserve roster | | | Before |
| 7/4/1987 | IAC | Gossage | Demoted to reserve roster | | | Before |
| 7/4/1987 | IAC | Gossage | Promoted to active roster | | | Before |
| 7/4/1987 | IAC | Heathcock | Released | | | Before |
| 7/4/1987 | IAC | Meads | Signed | | | Before |
| 7/4/1987 | IAC | Meads | Demoted to reserve roster | | | Before |
| 7/4/1987 | IAC | Meads | Promoted to active roster | | | Before |
| 7/4/1987 | IAC | Roenicke | Promoted to active roster | | | Before |
| 7/4/1987 | IAC | Sellers | Demoted to reserve roster | | | Before |
| 7/4/1987 | LER | Simmons | Placed on Injured List | | 7/4/1987 | Before |
| 7/4/1987 | NYM | Bush | Promoted to active roster | | | Before |
| 7/4/1987 | NYM | Leach | Demoted to reserve roster | | | Before |
| 7/4/1987 | SMV | Gallagher | Placed on Injured List | | 7/4/1987 | Before |
| 7/9/1987 | CAR | Martinez | Demoted to reserve roster | | | Before |
| 7/9/1987 | CAR | Rayford | Demoted to reserve roster | | | Before |
| 7/9/1987 | CAR | Trevino | Promoted to active roster | | | Before |
| 7/9/1987 | CAR | Wynne | Promoted to active roster | | | Before |
| 7/9/1987 | CRF | Easterly | Traded away | IAC | | After |
| 7/9/1987 | CRF | James | Traded away | IAC | | After |
| 7/9/1987 | CRF | Sellers | Acquired via trade | IAC | | After |
| 7/9/1987 | CRF | Young | Acquired via trade | IAC | | After |
| 7/9/1987 | IAC | Burks | Demoted to reserve roster | | | Before |
| 7/9/1987 | IAC | Ford | Promoted to active roster | | | Before |
| 7/9/1987 | IAC | O'Neal | Promoted to active roster | | | Before |
| 7/9/1987 | IAC | Roenicke | Demoted to reserve roster | | | Before |
| 7/9/1987 | IAC | Thurman | Promoted to active roster | | | Before |
| 7/9/1987 | IAC | Young | Demoted to reserve roster | | | Before |
| 7/9/1987 | IAC | Easterly | Acquired via trade | CRF | | After |
| 7/9/1987 | IAC | James | Acquired via trade | CRF | | After |
| 7/9/1987 | IAC | Sellers | Traded away | CRF | | After |
| 7/9/1987 | IAC | Young | Traded away | CRF | | After |
| 7/9/1987 | NYM | Cox | Acquired via trade | ROC | | After |
| 7/9/1987 | ROC | Shirley | Signed | | | Before |
| 7/9/1987 | ROC | Cox | Traded away | NYM | | After |
| 7/9/1987 | SMV | LaPoint | Demoted to reserve roster | | | Before |
| 7/9/1987 | SMV | O'Connor | Promoted to active roster | | | Before |
| 7/9/1987 | SMV | Quinones | Promoted to active roster | | | Before |
| 7/11/1987 | BHS | Destrade | Placed on Injured List | | 7/10/1987 | Before |
| 7/11/1987 | BHS | Lusader | Placed on Injured List | | 7/10/1987 | Before |
| 7/11/1987 | BRM | Almon | Demoted to reserve roster | | | Before |
| 7/11/1987 | BRM | Collins | Promoted to active roster | | | Before |
| 7/11/1987 | BRM | Gullickson | Promoted to active roster | | | Before |
| 7/11/1987 | BRM | Sutton | Demoted to reserve roster | | | Before |
| 7/11/1987 | CLE | Price | Placed on Injured List | | 7/10/1987 | Before |
| 7/11/1987 | COL | Tibbs | Placed on Injured List | | 7/10/1987 | Before |
| 7/11/1987 | CRF | Lancaster | Demoted to reserve roster | | | Before |
| 7/11/1987 | CRF | Lancaster | Promoted to active roster | | | Before |
| 7/11/1987 | CRF | Sellers | Promoted to active roster | | | Before |
| 7/11/1987 | EBS | Johnson | Promoted to active roster | | | Before |
| 7/11/1987 | EBS | Lazorko | Demoted to reserve roster | | | Before |
| 7/11/1987 | EBS | McCaskill | Promoted to active roster | | | Before |
| 7/11/1987 | EBS | O'Malley | Demoted to reserve roster | | | Before |
| 7/11/1987 | EBS | O'Malley | Promoted to active roster | | | Before |
| 7/11/1987 | EBS | Sheaffer | Demoted to reserve roster | | | Before |
| 7/11/1987 | EBS | Tanana | Demoted to reserve roster | | | Before |
| 7/11/1987 | FRA | Arnsberg | Demoted to reserve roster | | | Before |
| 7/11/1987 | FRA | Castillo | Promoted to active roster | | | Before |
| 7/11/1987 | FRA | Childress | Demoted to reserve roster | | | Before |
| 7/11/1987 | FRA | Dayett | Promoted to active roster | | | Before |
| 7/11/1987 | FRA | Jones | Promoted to active roster | | | Before |
| 7/11/1987 | FRA | Laudner | Demoted to reserve roster | | | Before |
| 7/11/1987 | FRA | Laudner | Promoted to active roster | | | Before |
| 7/11/1987 | FRA | Madlock | Demoted to reserve roster | | | Before |
| 7/11/1987 | FRA | McRae | Demoted to reserve roster | | | Before |
| 7/11/1987 | FRA | McRae | Promoted to active roster | | | Before |
| 7/11/1987 | FRA | Meacham | Demoted to reserve roster | | | Before |
| 7/11/1987 | FRA | Mirabella | Promoted to active roster | | | Before |
| 7/11/1987 | HAT | Davis | Placed on Injured List | | 7/10/1987 | Before |
| 7/11/1987 | IAC | Burks | Promoted to active roster | | | Before |
| 7/11/1987 | IAC | Gossage | Demoted to reserve roster | | | Before |
| 7/11/1987 | IAC | Hairston | Demoted to reserve roster | | | Before |
| 7/11/1987 | OTT | Conroy | Released | | | Before |
| 7/11/1987 | OTT | Conroy | Signed | | | Before |
| 7/11/1987 | OTT | Conroy | Signed | | | Before |
| 7/11/1987 | OTT | Haas | Released | | | Before |
| 7/11/1987 | OTT | Haas | Released | | | Before |
| 7/11/1987 | OTT | Haas | Signed | | | Before |
| 7/11/1987 | OTT | Haas | Activated from Injured List | | | Before |
| 7/11/1987 | OTT | Haas | Activated from Injured List | | | Before |
| 7/11/1987 | OTT | Haas | Placed on Injured List | | 7/10/1987 | Before |
| 7/11/1987 | ROC | Shirley | Demoted to reserve roster | | | Before |
| 7/11/1987 | SMV | LaPoint | Promoted to active roster | | | Before |
| 7/11/1987 | SMV | LaPoint | Placed on Injured List | | 7/10/1987 | Before |
| 7/11/1987 | WWS | Brooks | Demoted to reserve roster | | | Before |
| 7/11/1987 | WWS | Owen | Promoted to active roster | | | Before |
| 7/12/1987 | FLU | Nunez | Demoted to reserve roster | | | Before |
| 7/16/1987 | BRM | Almon | Promoted to active roster | | | Before |
| 7/16/1987 | BRM | Collins | Demoted to reserve roster | | | Before |
| 7/16/1987 | BRM | Pena | Demoted to reserve roster | | | Before |
| 7/16/1987 | BRM | Sutton | Promoted to active roster | | | Before |
| 7/16/1987 | EBS | Belcher | Promoted to active roster | | | Before |
| 7/16/1987 | EBS | Calhoun | Demoted to reserve roster | | | Before |
| 7/16/1987 | EBS | Cotto | Demoted to reserve roster | | | Before |
| 7/16/1987 | EBS | Johnson | Demoted to reserve roster | | | Before |
| 7/16/1987 | EBS | Lazorko | Promoted to active roster | | | Before |
| 7/16/1987 | EBS | McCaskill | Demoted to reserve roster | | | Before |
| 7/16/1987 | EBS | Tanana | Promoted to active roster | | | Before |
| 7/16/1987 | EBS | Wills | Promoted to active roster | | | Before |
| 7/16/1987 | FLU | Griffey | Promoted to active roster | | | Before |
| 7/16/1987 | FLU | Landreaux | Demoted to reserve roster | | | Before |
| 7/16/1987 | FLU | Sisk | Promoted to active roster | | | Before |
| 7/16/1987 | IAC | Allanson | Promoted to active roster | | | Before |
| 7/16/1987 | IAC | Easterly | Promoted to active roster | | | Before |
| 7/16/1987 | IAC | Ford | Demoted to reserve roster | | | Before |
| 7/16/1987 | IAC | Hairston | Promoted to active roster | | | Before |
| 7/16/1987 | IAC | Hernandez | Demoted to reserve roster | | | Before |
| 7/16/1987 | IAC | McClendon | Demoted to reserve roster | | | Before |
| 7/16/1987 | IAC | Meads | Demoted to reserve roster | | | Before |
| 7/16/1987 | IAC | Stapleton | Promoted to active roster | | | Before |
| 7/16/1987 | IAC | Thurman | Demoted to reserve roster | | | Before |
| 7/16/1987 | IAC | Thurman | Promoted to active roster | | | Before |
| 7/16/1987 | ROC | Hawkins | Promoted to active roster | | | Before |
| 7/16/1987 | ROC | Landrum | Demoted to reserve roster | | | Before |
| 7/16/1987 | ROC | Ontiveros | Demoted to reserve roster | | | Before |
| 7/16/1987 | ROC | Shirley | Promoted to active roster | | | Before |
| 7/17/1987 | BHS | Browne | Demoted to reserve roster | | | Before |
| 7/17/1987 | BHS | Browne | Promoted to active roster | | | Before |
| 7/17/1987 | BHS | Brumley | Promoted to active roster | | | Before |
| 7/17/1987 | BRM | Collins | Released | | | Before |
| 7/17/1987 | BRM | Lopes | Signed | | | Before |
| 7/17/1987 | CAR | Agosto | Promoted to active roster | | | Before |
| 7/17/1987 | CAR | Bailey | Promoted to active roster | | | Before |
| 7/17/1987 | CAR | Boston | Demoted to reserve roster | | | Before |
| 7/17/1987 | CAR | Buhner | Promoted to active roster | | | Before |
| 7/17/1987 | CAR | Hinzo | Demoted to reserve roster | | | Before |
| 7/17/1987 | CAR | Lemon | Demoted to reserve roster | | | Before |
| 7/17/1987 | CAR | Martinez | Promoted to active roster | | | Before |
| 7/17/1987 | CAR | Noles | Demoted to reserve roster | | | Before |
| 7/17/1987 | CAR | Treadway | Promoted to active roster | | | Before |
| 7/17/1987 | CAR | Trevino | Demoted to reserve roster | | | Before |
| 7/17/1987 | CRF | Young | Placed on Injured List | | 7/17/1987 | Before |
| 7/17/1987 | FLU | Garner | Signed | | | Before |
| 7/17/1987 | FLU | Nunez | Released | | | Before |
| 7/17/1987 | OTT | Nixon | Promoted to active roster | | | Before |
| 7/22/1987 | BRM | Jackson | Traded away | SMV | | After |
| 7/22/1987 | CAR | Agosto | Demoted to reserve roster | | | Before |
| 7/22/1987 | CAR | Bailey | Demoted to reserve roster | | | Before |
| 7/22/1987 | CAR | Boston | Promoted to active roster | | | Before |
| 7/22/1987 | CAR | Buhner | Demoted to reserve roster | | | Before |
| 7/22/1987 | CAR | Hinzo | Promoted to active roster | | | Before |
| 7/22/1987 | CAR | Lemon | Promoted to active roster | | | Before |
| 7/22/1987 | CAR | Noles | Demoted to reserve roster | | | Before |
| 7/22/1987 | CAR | Noles | Promoted to active roster | | | Before |
| 7/22/1987 | CAR | Powell | Promoted to active roster | | | Before |
| 7/22/1987 | CAR | Treadway | Demoted to reserve roster | | | Before |
| 7/22/1987 | CAR | Trevino | Promoted to active roster | | | Before |
| 7/22/1987 | CAR | Wynne | Demoted to reserve roster | | | Before |
| 7/22/1987 | CLE | Sasser | Promoted to active roster | | | Before |
| 7/22/1987 | CLE | Taylor | Demoted to reserve roster | | | Before |
| 7/22/1987 | CLE | Tudor | Promoted to active roster | | | Before |
| 7/22/1987 | COL | Anderson | Demoted to reserve roster | | | Before |
| 7/22/1987 | COL | Galarraga | Promoted to active roster | | | Before |
| 7/22/1987 | COL | Harper | Demoted to reserve roster | | | Before |
| 7/22/1987 | COL | Herndon | Demoted to reserve roster | | | Before |
| 7/22/1987 | COL | Herndon | Promoted to active roster | | | Before |
| 7/22/1987 | COL | Javier | Demoted to reserve roster | | | Before |
| 7/22/1987 | COL | Oester | Promoted to active roster | | | Before |
| 7/22/1987 | COL | Phillips | Promoted to active roster | | | Before |
| 7/22/1987 | EBS | Belcher | Demoted to reserve roster | | | Before |
| 7/22/1987 | EBS | Calhoun | Promoted to active roster | | | Before |
| 7/22/1987 | EBS | Johnson | Promoted to active roster | | | Before |
| 7/22/1987 | EBS | Sheaffer | Demoted to reserve roster | | | Before |
| 7/22/1987 | EBS | Sheaffer | Promoted to active roster | | | Before |
| 7/22/1987 | EBS | Wills | Demoted to reserve roster | | | Before |
| 7/22/1987 | NYM | Boyd | Demoted to reserve roster | | | Before |
| 7/22/1987 | NYM | Leach | Promoted to active roster | | | Before |
| 7/22/1987 | SMV | Jackson | Acquired via trade | BRM | | After |
| 7/24/1987 | BHS | Browne | Promoted to active roster | | | Before |
| 7/24/1987 | BHS | Moore | Promoted to active roster | | | Before |
| 7/24/1987 | BHS | Trillo | Demoted to reserve roster | | | Before |
| 7/24/1987 | BRM | Green | Signed | | | Before |
| 7/24/1987 | COL | Grubb | Released | | | Before |
| 7/24/1987 | COL | Grubb | Activated from Injured List | | | Before |
| 7/24/1987 | COL | Polidor | Signed | | | Before |
| 7/24/1987 | DAY | Thon | Placed on Injured List | | 7/23/1987 | Before |
| 7/24/1987 | EBS | Wills | Promoted to active roster | | | Before |
| 7/24/1987 | EBS | Wills | Placed on Injured List | | 7/23/1987 | Before |
| 7/24/1987 | FLU | Marzano | Demoted to reserve roster | | | Before |
| 7/24/1987 | FRA | Arnsberg | Promoted to active roster | | | Before |
| 7/24/1987 | FRA | Dayett | Demoted to reserve roster | | | Before |
| 7/24/1987 | FRA | Gordon | Demoted to reserve roster | | | Before |
| 7/24/1987 | FRA | Meacham | Promoted to active roster | | | Before |
| 7/24/1987 | HAT | Balboni | Demoted to reserve roster | | | Before |
| 7/24/1987 | HAT | Bosley | Promoted to active roster | | | Before |
| 7/24/1987 | HAT | Davis | Released | | | Before |
| 7/24/1987 | HAT | Davis | Activated from Injured List | | | Before |
| 7/24/1987 | HAT | Hendrick | Promoted to active roster | | | Before |
| 7/24/1987 | HAT | Lavelle | Signed | | | Before |
| 7/24/1987 | HAT | Leiter | Promoted to active roster | | | Before |
| 7/24/1987 | HAT | Leonard | Demoted to reserve roster | | | Before |
| 7/24/1987 | HAT | O'Brien | Promoted to active roster | | | Before |
| 7/24/1987 | HAT | O'Neill | Demoted to reserve roster | | | Before |
| 7/24/1987 | HAT | Rodriguez | Signed | | | Before |
| 7/24/1987 | HAT | Slaught | Demoted to reserve roster | | | Before |
| 7/24/1987 | HAT | Youngblood | Released | | | Before |
| 7/24/1987 | HAT | Youngblood | Activated from Injured List | | | Before |
| 7/24/1987 | HAT | Youngblood | Placed on Injured List | | 7/23/1987 | Before |
| 7/24/1987 | IAC | Allanson | Demoted to reserve roster | | | Before |
| 7/24/1987 | IAC | Ford | Promoted to active roster | | | Before |
| 7/24/1987 | IAC | Hairston | Demoted to reserve roster | | | Before |
| 7/24/1987 | IAC | Hernandez | Promoted to active roster | | | Before |
| 7/24/1987 | IAC | McClendon | Promoted to active roster | | | Before |
| 7/24/1987 | IAC | O'Neal | Demoted to reserve roster | | | Before |
| 7/24/1987 | IAC | Roenicke | Demoted to reserve roster | | | Before |
| 7/24/1987 | IAC | Roenicke | Promoted to active roster | | | Before |
| 7/24/1987 | LER | Washington | Placed on Injured List | | 7/23/1987 | Before |
| 7/24/1987 | NYM | Bell | Demoted to reserve roster | | | Before |
| 7/24/1987 | NYM | Belliard | Promoted to active roster | | | Before |
| 7/24/1987 | ROC | Forsch | Demoted to reserve roster | | | Before |
| 7/24/1987 | ROC | Hawkins | Demoted to reserve roster | | | Before |
| 7/24/1987 | ROC | Ontiveros | Promoted to active roster | | | Before |
| 7/24/1987 | ROC | Stoddard | Promoted to active roster | | | Before |
| 7/24/1987 | SMV | Henry | Released | | | Before |
| 7/24/1987 | SMV | Jackson | Promoted to active roster | | | Before |
| 7/24/1987 | SMV | Quinones | Demoted to reserve roster | | | Before |
| 7/29/1987 | BHS | Ford | Acquired via trade | IAC | | After |
| 7/29/1987 | CLE | Clark | Demoted to reserve roster | | | Before |
| 7/29/1987 | CLE | Howe | Promoted to active roster | | | Before |
| 7/29/1987 | CLE | Weiss | Promoted to active roster | | | Before |
| 7/29/1987 | HAT | Howell | Demoted to reserve roster | | | Before |
| 7/29/1987 | HAT | Howell | Promoted to active roster | | | Before |
| 7/29/1987 | HAT | Leiter | Demoted to reserve roster | | | Before |
| 7/29/1987 | HAT | Leiter | Promoted to active roster | | | Before |
| 7/29/1987 | HAT | Leiter | Demoted to reserve roster | | | Before |
| 7/29/1987 | HAT | Mason | Promoted to active roster | | | Before |
| 7/29/1987 | HAT | Rodriguez | Demoted to reserve roster | | | Before |
| 7/29/1987 | HAT | Samuel | Demoted to reserve roster | | | Before |
| 7/29/1987 | HAT | Samuel | Promoted to active roster | | | Before |
| 7/29/1987 | HAT | Sharperson | Promoted to active roster | | | Before |
| 7/29/1987 | IAC | Allanson | Promoted to active roster | | | Before |
| 7/29/1987 | IAC | Gossage | Promoted to active roster | | | Before |
| 7/29/1987 | IAC | McClendon | Demoted to reserve roster | | | Before |
| 7/29/1987 | IAC | Stapleton | Demoted to reserve roster | | | Before |
| 7/29/1987 | IAC | Ford | Traded away | BHS | | After |
| 7/29/1987 | ROC | Forsch | Promoted to active roster | | | Before |
| 7/29/1987 | ROC | Fraser | Demoted to reserve roster | | | Before |
| 7/30/1987 | BHS | Bonilla | Demoted to reserve roster | | | Before |
| 7/30/1987 | BHS | Bonilla | Promoted to active roster | | | Before |
| 7/30/1987 | BHS | Destrade | Released | | | Before |
| 7/30/1987 | BHS | Destrade | Activated from Injured List | | | Before |
| 7/30/1987 | BHS | Oquendo | Promoted to active roster | | | Before |
| 7/30/1987 | BHS | Perez | Demoted to reserve roster | | | Before |
| 7/30/1987 | BHS | Thompson | Demoted to reserve roster | | | Before |
| 7/30/1987 | BRM | Almon | Demoted to reserve roster | | | Before |
| 7/30/1987 | BRM | Green | Demoted to reserve roster | | | Before |
| 7/30/1987 | EBS | Dunne | Demoted to reserve roster | | | Before |
| 7/30/1987 | EBS | McCaskill | Promoted to active roster | | | Before |
| 7/30/1987 | FLU | Hoffman | Demoted to reserve roster | | | Before |
| 7/30/1987 | FLU | Kilgus | Demoted to reserve roster | | | Before |
| 7/30/1987 | FLU | Marzano | Released | | | Before |
| 7/30/1987 | FLU | Nichols | Signed | | | Before |
| 7/30/1987 | FLU | Portugal | Promoted to active roster | | | Before |
| 7/30/1987 | FLU | Tewksbury | Promoted to active roster | | | Before |
| 7/30/1987 | FRA | Arnsberg | Demoted to reserve roster | | | Before |
| 7/30/1987 | FRA | Castillo | Demoted to reserve roster | | | Before |
| 7/30/1987 | FRA | Childress | Demoted to reserve roster | | | Before |
| 7/30/1987 | FRA | Childress | Promoted to active roster | | | Before |
| 7/30/1987 | FRA | Dayett | Promoted to active roster | | | Before |
| 7/30/1987 | FRA | Gordon | Promoted to active roster | | | Before |
| 7/30/1987 | FRA | Hearn | Promoted to active roster | | | Before |
| 7/30/1987 | FRA | Heath | Demoted to reserve roster | | | Before |
| 7/30/1987 | FRA | King | Demoted to reserve roster | | | Before |
| 7/30/1987 | FRA | King | Promoted to active roster | | | Before |
| 7/30/1987 | FRA | Madlock | Promoted to active roster | | | Before |
| 7/30/1987 | FRA | McRae | Demoted to reserve roster | | | Before |
| 7/30/1987 | FRA | McRae | Promoted to active roster | | | Before |
| 7/30/1987 | FRA | Mirabella | Demoted to reserve roster | | | Before |
| 7/30/1987 | IAC | Sakata | Signed | | | Before |
| 7/30/1987 | ROC | Bando | Demoted to reserve roster | | | Before |
| 7/30/1987 | ROC | Benedict | Promoted to active roster | | | Before |
| 7/30/1987 | ROC | Fraser | Promoted to active roster | | | Before |
| 7/30/1987 | ROC | Rijo | Demoted to reserve roster | | | Before |
| 7/31/1987 | EBS | Calhoun | Demoted to reserve roster | | | Before |
| 7/31/1987 | MIL | McDowell | Promoted to active roster | | | Before |
| 7/31/1987 | MIL | Nieves | Demoted to reserve roster | | | Before |
| 8/4/1987 | BHS | Bonilla | Demoted to reserve roster | | | Before |
| 8/4/1987 | BHS | Thompson | Promoted to active roster | | | Before |
| 8/4/1987 | EBS | Cotto | Promoted to active roster | | | Before |
| 8/4/1987 | EBS | Dunne | Promoted to active roster | | | Before |
| 8/4/1987 | EBS | Johnson | Demoted to reserve roster | | | Before |
| 8/4/1987 | EBS | Maddux | Promoted to active roster | | | Before |
| 8/4/1987 | EBS | Niekro | Demoted to reserve roster | | | Before |
| 8/4/1987 | EBS | Porter | Demoted to reserve roster | | | Before |
| 8/4/1987 | EBS | Sheaffer | Promoted to active roster | | | Before |
| 8/4/1987 | FLU | Hoffman | Promoted to active roster | | | Before |
| 8/4/1987 | FLU | Kilgus | Promoted to active roster | | | Before |
| 8/4/1987 | FLU | Portugal | Demoted to reserve roster | | | Before |
| 8/4/1987 | FLU | Tewksbury | Demoted to reserve roster | | | Before |
| 8/4/1987 | OTT | Reed | Promoted to active roster | | | Before |
| 8/4/1987 | OTT | Stanley | Demoted to reserve roster | | | Before |
| 8/4/1987 | ROC | Bando | Promoted to active roster | | | Before |
| 8/4/1987 | ROC | Benedict | Demoted to reserve roster | | | Before |
| 8/4/1987 | ROC | Farrell | Promoted to active roster | | | Before |
| 8/4/1987 | ROC | Snell | Demoted to reserve roster | | | Before |
| 8/6/1987 | BCB | Coles | Promoted to active roster | | | Before |
| 8/6/1987 | BCB | Molitor | Demoted to reserve roster | | | Before |
| 8/6/1987 | BHS | Bonilla | Placed on Injured List | | 8/5/1987 | Before |
| 8/6/1987 | BRM | Booker | Promoted to active roster | | | Before |
| 8/6/1987 | BRM | Noce | Demoted to reserve roster | | | Before |
| 8/6/1987 | CAR | Noles | Promoted to active roster | | | Before |
| 8/6/1987 | CAR | Powell | Demoted to reserve roster | | | Before |
| 8/6/1987 | CAR | Rayford | Promoted to active roster | | | Before |
| 8/6/1987 | CAR | Trevino | Demoted to reserve roster | | | Before |
| 8/6/1987 | CLE | Daulton | Placed on Injured List | | 8/5/1987 | Before |
| 8/6/1987 | COL | Andujar | Promoted to active roster | | | Before |
| 8/6/1987 | COL | Griffin | Demoted to reserve roster | | | Before |
| 8/6/1987 | COL | Henderson | Demoted to reserve roster | | | Before |
| 8/6/1987 | COL | Javier | Promoted to active roster | | | Before |
| 8/6/1987 | COL | McGregor | Promoted to active roster | | | Before |
| 8/6/1987 | COL | McLemore | Demoted to reserve roster | | | Before |
| 8/6/1987 | COL | Myers | Promoted to active roster | | | Before |
| 8/6/1987 | COL | Petralli | Demoted to reserve roster | | | Before |
| 8/6/1987 | COL | Youmans | Demoted to reserve roster | | | Before |
| 8/6/1987 | CRF | Lacy | Released | | | Before |
| 8/6/1987 | CRF | Lacy | Activated from Injured List | | | Before |
| 8/6/1987 | CRF | Lacy | Placed on Injured List | | 8/5/1987 | Before |
| 8/6/1987 | CRF | Stone | Signed | | | Before |
| 8/6/1987 | EBS | Calhoun | Released | | | Before |
| 8/6/1987 | EBS | Gorman | Signed | | | Before |
| 8/6/1987 | EBS | Lazorko | Demoted to reserve roster | | | Before |
| 8/6/1987 | EBS | Lazorko | Promoted to active roster | | | Before |
| 8/6/1987 | EBS | Maddux | Demoted to reserve roster | | | Before |
| 8/6/1987 | EBS | Noboa | Signed | | | Before |
| 8/6/1987 | EBS | Noboa | Demoted to reserve roster | | | Before |
| 8/6/1987 | EBS | Porter | Released | | | Before |
| 8/6/1987 | EBS | Porter | Activated from Injured List | | | Before |
| 8/6/1987 | EBS | Porter | Promoted to active roster | | | Before |
| 8/6/1987 | EBS | Porter | Placed on Injured List | | 8/5/1987 | Before |
| 8/6/1987 | IAC | Hernandez | Demoted to reserve roster | | | Before |
| 8/6/1987 | IAC | O'Neal | Promoted to active roster | | | Before |
| 8/6/1987 | MIL | Flanagan | Demoted to reserve roster | | | Before |
| 8/6/1987 | MIL | Nieves | Promoted to active roster | | | Before |
| 8/6/1987 | MIL | Rice | Demoted to reserve roster | | | Before |
| 8/6/1987 | MIL | Wasinger | Promoted to active roster | | | Before |
| 8/6/1987 | OTT | Conroy | Demoted to reserve roster | | | Before |
| 8/6/1987 | OTT | Swindell | Promoted to active roster | | | Before |
| 8/11/1987 | BCB | Coles | Demoted to reserve roster | | | Before |
| 8/11/1987 | BCB | Molitor | Promoted to active roster | | | Before |
| 8/11/1987 | BRM | Green | Promoted to active roster | | | Before |
| 8/11/1987 | BRM | Lopes | Demoted to reserve roster | | | Before |
| 8/11/1987 | BRM | Noce | Promoted to active roster | | | Before |
| 8/11/1987 | BRM | Pedrique | Demoted to reserve roster | | | Before |
| 8/11/1987 | DAY | Innis | Promoted to active roster | | | Before |
| 8/11/1987 | DAY | McClure | Demoted to reserve roster | | | Before |
| 8/11/1987 | DAY | Ward | Promoted to active roster | | | Before |
| 8/11/1987 | IAC | Roenicke | Promoted to active roster | | | Before |
| 8/11/1987 | IAC | Thurman | Demoted to reserve roster | | | Before |
| 8/11/1987 | MIL | Bonilla | Demoted to reserve roster | | | Before |
| 8/11/1987 | MIL | Driessen | Promoted to active roster | | | Before |
| 8/11/1987 | MIL | Hassey | Promoted to active roster | | | Before |
| 8/11/1987 | MIL | Mumphrey | Demoted to reserve roster | | | Before |
| 8/11/1987 | NYM | Brantley | Demoted to reserve roster | | | Before |
| 8/11/1987 | NYM | Brown | Promoted to active roster | | | Before |
| 8/12/1987 | BHS | Manning | Demoted to reserve roster | | | Before |
| 8/12/1987 | BHS | Perez | Promoted to active roster | | | Before |
| 8/12/1987 | BHS | Show | Demoted to reserve roster | | | Before |
| 8/12/1987 | BHS | Trillo | Promoted to active roster | | | Before |
| 8/12/1987 | COL | Andujar | Released | | | Before |
| 8/12/1987 | COL | Henderson | Promoted to active roster | | | Before |
| 8/12/1987 | COL | Herndon | Demoted to reserve roster | | | Before |
| 8/12/1987 | COL | Herndon | Promoted to active roster | | | Before |
| 8/12/1987 | COL | Johnson | Promoted to active roster | | | Before |
| 8/12/1987 | COL | Myers | Demoted to reserve roster | | | Before |
| 8/12/1987 | COL | Nixon | Demoted to reserve roster | | | Before |
| 8/12/1987 | COL | Stefero | Signed | | | Before |
| 8/12/1987 | CRF | Young | Promoted to active roster | | | Before |
| 8/12/1987 | EBS | Dernier | Demoted to reserve roster | | | Before |
| 8/12/1987 | EBS | Niekro | Promoted to active roster | | | Before |
| 8/12/1987 | EBS | Noboa | Promoted to active roster | | | Before |
| 8/12/1987 | EBS | O'Malley | Demoted to reserve roster | | | Before |
| 8/12/1987 | FRA | Castillo | Promoted to active roster | | | Before |
| 8/12/1987 | FRA | Dayett | Demoted to reserve roster | | | Before |
| 8/12/1987 | FRA | Hearn | Demoted to reserve roster | | | Before |
| 8/12/1987 | FRA | Heath | Promoted to active roster | | | Before |
| 8/12/1987 | FRA | Jones | Demoted to reserve roster | | | Before |
| 8/12/1987 | FRA | Mirabella | Promoted to active roster | | | Before |
| 8/12/1987 | HAT | Howell | Demoted to reserve roster | | | Before |
| 8/12/1987 | HAT | Rodriguez | Promoted to active roster | | | Before |
| 8/12/1987 | HAT | Sharperson | Demoted to reserve roster | | | Before |
| 8/12/1987 | HAT | Velarde | Promoted to active roster | | | Before |
| 8/12/1987 | OTT | Conroy | Promoted to active roster | | | Before |
| 8/12/1987 | OTT | Gonzales | Promoted to active roster | | | Before |
| 8/12/1987 | OTT | Swindell | Demoted to reserve roster | | | Before |
| 8/12/1987 | OTT | Wilkerson | Demoted to reserve roster | | | Before |
| 8/12/1987 | WWS | Brower | Promoted to active roster | | | Before |
| 8/12/1987 | WWS | Gross,G | Promoted to active roster | | | Before |
| 8/12/1987 | WWS | Hatcher | Demoted to reserve roster | | | Before |
| 8/12/1987 | WWS | Horn | Demoted to reserve roster | | | Before |
| 8/12/1987 | WWS | Mathews | Demoted to reserve roster | | | Before |
| 8/12/1987 | WWS | Mesa | Promoted to active roster | | | Before |
| 8/17/1987 | HAT | Bosley | Demoted to reserve roster | | | Before |
| 8/17/1987 | HAT | Hendrick | Demoted to reserve roster | | | Before |
| 8/17/1987 | HAT | Hendrick | Promoted to active roster | | | Before |
| 8/17/1987 | HAT | Leonard | Promoted to active roster | | | Before |
| 8/17/1987 | HAT | Velarde | Demoted to reserve roster | | | Before |
| 8/17/1987 | HAT | Zuvella | Promoted to active roster | | | Before |
| 8/17/1987 | IAC | Hairston | Promoted to active roster | | | Before |
| 8/17/1987 | IAC | Hernandez | Promoted to active roster | | | Before |
| 8/17/1987 | IAC | Palmer | Demoted to reserve roster | | | Before |
| 8/17/1987 | IAC | Roenicke | Demoted to reserve roster | | | Before |
| 8/17/1987 | IAC | Sakata | Demoted to reserve roster | | | Before |
| 8/17/1987 | IAC | Thurman | Promoted to active roster | | | Before |
| 8/17/1987 | OTT | Bordi | Signed | | | Before |
| 8/17/1987 | OTT | Burleson | Promoted to active roster | | | Before |
| 8/17/1987 | OTT | Cangelosi | Demoted to reserve roster | | | Before |
| 8/17/1987 | OTT | Conroy | Released | | | Before |
| 8/17/1987 | OTT | Heep | Released | | | Before |
| 8/17/1987 | OTT | Landrum | Signed | | | Before |
| 8/17/1987 | OTT | Liriano | Demoted to reserve roster | | | Before |
| 8/17/1987 | OTT | Ramsey | Signed | | | Before |
| 8/17/1987 | OTT | Romero | Released | | | Before |
| 8/17/1987 | OTT | Swindell | Promoted to active roster | | | Before |
| 8/17/1987 | SMV | Bergman | Promoted to active roster | | | Before |
| 8/17/1987 | SMV | Guante | Demoted to reserve roster | | | Before |
| 8/17/1987 | WWS | Brooks | Promoted to active roster | | | Before |
| 8/17/1987 | WWS | Brower | Demoted to reserve roster | | | Before |
| 8/17/1987 | WWS | Caminiti | Demoted to reserve roster | | | Before |
| 8/17/1987 | WWS | Hatcher | Promoted to active roster | | | Before |
| 8/17/1987 | WWS | Horn | Promoted to active roster | | | Before |
| 8/17/1987 | WWS | Mathews | Promoted to active roster | | | Before |
| 8/17/1987 | WWS | Mesa | Demoted to reserve roster | | | Before |
| 8/17/1987 | WWS | Owen | Demoted to reserve roster | | | Before |
| 8/19/1987 | BCB | Trout | Placed on Injured List | | 8/18/1987 | Before |
| 8/19/1987 | BHS | Backman | Demoted to reserve roster | | | Before |
| 8/19/1987 | BHS | Manning | Promoted to active roster | | | Before |
| 8/19/1987 | BHS | Raines | Demoted to reserve roster | | | Before |
| 8/19/1987 | BHS | Show | Promoted to active roster | | | Before |
| 8/19/1987 | CAR | Agosto | Promoted to active roster | | | Before |
| 8/19/1987 | CAR | Boston | Demoted to reserve roster | | | Before |
| 8/19/1987 | CAR | Buhner | Promoted to active roster | | | Before |
| 8/19/1987 | CAR | Hinzo | Demoted to reserve roster | | | Before |
| 8/19/1987 | CAR | Noles | Demoted to reserve roster | | | Before |
| 8/19/1987 | CAR | Pagnozzi | Promoted to active roster | | | Before |
| 8/19/1987 | CAR | Powell | Promoted to active roster | | | Before |
| 8/19/1987 | CAR | Rayford | Demoted to reserve roster | | | Before |
| 8/19/1987 | CAR | Schofield | Demoted to reserve roster | | | Before |
| 8/19/1987 | CAR | Treadway | Promoted to active roster | | | Before |
| 8/19/1987 | CLE | Fielder | Placed on Injured List | | 8/18/1987 | Before |
| 8/19/1987 | CLE | Hatcher | Placed on Injured List | | 8/18/1987 | Before |
| 8/19/1987 | CLE | Thompson | Placed on Injured List | | 8/18/1987 | Before |
| 8/19/1987 | CLE | Tudor | Placed on Injured List | | 8/18/1987 | Before |
| 8/19/1987 | CLE | Uribe | Placed on Injured List | | 8/18/1987 | Before |
| 8/19/1987 | DAY | Glavine | Placed on Injured List | | 8/18/1987 | Before |
| 8/19/1987 | LER | Davidson | Placed on Injured List | | 7/30/1987 | Before |
| 8/19/1987 | LER | Schatzeder | Placed on Injured List | | 8/18/1987 | Before |
| 8/19/1987 | MIL | Kelly | Promoted to active roster | | | Before |
| 8/19/1987 | MIL | McDowell | Demoted to reserve roster | | | Before |
| 8/19/1987 | OTT | Bordi | Signed | | | Before |
| 8/19/1987 | OTT | Conroy | Released | | | Before |
| 8/19/1987 | OTT | Heep | Released | | | Before |
| 8/19/1987 | OTT | Landrum | Signed | | | Before |
| 8/19/1987 | OTT | Nixon | Placed on Injured List | | 7/30/1987 | Before |
| 8/19/1987 | OTT | Ramsey | Signed | | | Before |
| 8/19/1987 | OTT | Romero | Released | | | Before |
| 8/19/1987 | SMV | Guante | Promoted to active roster | | | Before |
| 8/19/1987 | SMV | Guante | Placed on Injured List | | 8/18/1987 | Before |
| 8/23/1987 | MIL | Kelly | Demoted to reserve roster | | | Before |
| 8/24/1987 | BRM | Allen | Demoted to reserve roster | | | Before |
| 8/24/1987 | BRM | Gullickson | Demoted to reserve roster | | | Before |
| 8/24/1987 | BRM | Pedrique | Promoted to active roster | | | Before |
| 8/24/1987 | BRM | Smith | Promoted to active roster | | | Before |
| 8/24/1987 | CAR | Boston | Promoted to active roster | | | Before |
| 8/24/1987 | CAR | Buhner | Demoted to reserve roster | | | Before |
| 8/24/1987 | CAR | Hinzo | Promoted to active roster | | | Before |
| 8/24/1987 | CAR | Noles | Promoted to active roster | | | Before |
| 8/24/1987 | CAR | Pagnozzi | Demoted to reserve roster | | | Before |
| 8/24/1987 | CAR | Powell | Demoted to reserve roster | | | Before |
| 8/24/1987 | CAR | Salazar | Demoted to reserve roster | | | Before |
| 8/24/1987 | CAR | Schofield | Promoted to active roster | | | Before |
| 8/24/1987 | CAR | Treadway | Demoted to reserve roster | | | Before |
| 8/24/1987 | CAR | Trevino | Promoted to active roster | | | Before |