| 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 |
| 4/15/1987 | BCB | Hillegas | 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 |
| 4/29/1987 | BRM | Gideon | Promoted to active roster | | | Before |
| 4/29/1987 | BRM | Stoddard | Demoted to reserve 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 |
| 5/13/1987 | BHS | Manning | Promoted to active roster | | | Before |
| 5/13/1987 | BHS | Ojeda | 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 | 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 | 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 | WWS | Assenmacher | Demoted to reserve roster | | | Before |
| 5/20/1987 | WWS | Assenmacher | Promoted to active roster | | | Before |