League standings -- American League
Regular season
| Divisional |
| Year | Team | W | L | Pct | GB | | L10 | Strk | Recent | RF | RA | Mgn | Mgc |
| 1988 | Bloomington Hoosiers | 69 | 21 | .767 | - |   | 10-0 | W10 | wwwwwwwwww | 484 | 262 | 222 | 58 |
| 1988 | Dayton Triangles | 54 | 36 | .600 | 15 |   | 4-6 | L2 | llwwllwwll | 414 | 366 | 48 | 88 |
| 1988 | Frankfort Tigers | 56 | 40 | .583 | 16 |   | 7-3 | L1 | lwwwwlwwlw | 425 | 392 | 33 | 86 |
| 1988 | Indy Alley Cats | 48 | 42 | .533 | 21 |   | 6-4 | W2 | wwllwwllww | 409 | 390 | 19 | 94 |
| 1988 | Cleveland Spiders | 47 | 43 | .522 | 22 |   | 4-6 | L1 | lwlwllwwll | 352 | 359 | -7 | 95 |
| 1988 | Rockford Forest Citys | 44 | 46 | .489 | 25 |   | 6-4 | W1 | wlwlwwwwll | 440 | 430 | 10 | 98 |
| 1988 | Collierstown Highlanders | 42 | 48 | .467 | 27 |   | 7-3 | W1 | wlwwwwlwlw | 407 | 413 | -6 | 100 |
| 1988 | Carolina Bandits | 40 | 50 | .444 | 29 |   | 1-9 | L1 | lwllllllll | 396 | 426 | -30 | 102 |
| 1988 | Hatteras Pelicans | 42 | 54 | .438 | 30 |   | 4-6 | W1 | wllllwllww | 379 | 458 | -79 | 100 |
| 1988 | Cuyahoga River Flames | 37 | 53 | .411 | 32 |   | 2-8 | L8 | llllllllww | 356 | 461 | -105 | 105 |
| 1988 | Evanston Black Sox | 30 | 60 | .333 | 39 |   | 4-6 | L2 | llwllwlwwl | 305 | 478 | -173 | 112 |
| Wildcard |
| Year | Team | W | L | Pct | GB | | L10 | Strk | Recent | Mgc |
| 1988 | Bloomington Hoosiers | 69 | 21 | .767 | na |   | 10-0 | W10 | wwwwwwwwww |   |
| 1988 | Dayton Triangles | 54 | 36 | .600 | - |   | 4-6 | L2 | llwwllwwll | 69 |
| 1988 | Frankfort Tigers | 56 | 40 | .583 | 1 |   | 7-3 | L1 | lwwwwlwwlw | 71 |
| 1988 | Indy Alley Cats | 48 | 42 | .533 | 6 |   | 6-4 | W2 | wwllwwllww | 79 |
| 1988 | Cleveland Spiders | 47 | 43 | .522 | 7 |   | 4-6 | L1 | lwlwllwwll | 80 |
| 1988 | Rockford Forest Citys | 44 | 46 | .489 | 10 |   | 6-4 | W1 | wlwlwwwwll | 83 |
| 1988 | Collierstown Highlanders | 42 | 48 | .467 | 12 |   | 7-3 | W1 | wlwwwwlwlw | 85 |
| 1988 | Carolina Bandits | 40 | 50 | .444 | 14 |   | 1-9 | L1 | lwllllllll | 87 |
| 1988 | Hatteras Pelicans | 42 | 54 | .438 | 15 |   | 4-6 | W1 | wllllwllww | 85 |
| 1988 | Cuyahoga River Flames | 37 | 53 | .411 | 17 |   | 2-8 | L8 | llllllllww | 90 |
| 1988 | Evanston Black Sox | 30 | 60 | .333 | 24 |   | 4-6 | L2 | llwllwlwwl | 97 |
| Expanded1 |
| Year | Team | Home | Road | Grass | Turf | vsLHP | vsRHP | Div | InterLg |
| 1988 | Bloomington Hoosiers | 37-8 | 32-13 | 49-9 | 20-12 | 26-4 | 43-17 | 37-11 | 32-10 |
| 1988 | Dayton Triangles | 28-17 | 26-19 | 14-10 | 40-26 | 22-10 | 32-26 | 29-19 | 25-17 |
| 1988 | Frankfort Tigers | 35-16 | 21-24 | 53-36 | 3-4 | 13-18 | 43-22 | 30-24 | 26-16 |
| 1988 | Indy Alley Cats | 29-16 | 19-26 | 38-33 | 10-9 | 11-11 | 37-31 | 29-19 | 19-23 |
| 1988 | Cleveland Spiders | 28-23 | 19-20 | 39-37 | 8-6 | 15-11 | 32-32 | 22-26 | 25-17 |
| 1988 | Rockford Forest Citys | 24-21 | 20-25 | 38-32 | 6-14 | 11-14 | 33-32 | 27-21 | 17-25 |
| 1988 | Collierstown Highlanders | 19-20 | 23-28 | 20-18 | 22-30 | 7-22 | 35-26 | 25-23 | 17-25 |
| 1988 | Carolina Bandits | 23-28 | 17-22 | 36-47 | 4-3 | 17-13 | 23-37 | 13-35 | 27-15 |
| 1988 | Hatteras Pelicans | 22-23 | 20-31 | 13-19 | 29-35 | 12-13 | 30-41 | 24-30 | 18-24 |
| 1988 | Cuyahoga River Flames | 20-19 | 17-34 | 34-42 | 3-11 | 9-17 | 28-36 | 18-30 | 19-23 |
| 1988 | Evanston Black Sox | 20-25 | 10-35 | 23-41 | 7-19 | 10-14 | 20-46 | 16-32 | 14-28 |
| Expanded2 |
| Year | Team | Lead7 | Tied7 | Trail7 | 1-run | Extra |
| 1988 | Bloomington Hoosiers | 55-6 | 8-2 | 6-13 | 16-10 | 9-3 |
| 1988 | Dayton Triangles | 46-4 | 3-11 | 5-21 | 14-14 | 5-6 |
| 1988 | Frankfort Tigers | 45-6 | 6-3 | 5-31 | 21-12 | 3-0 |
| 1988 | Indy Alley Cats | 39-4 | 4-4 | 5-34 | 20-11 | 5-5 |
| 1988 | Cleveland Spiders | 33-4 | 10-7 | 4-32 | 22-18 | 5-6 |
| 1988 | Rockford Forest Citys | 38-2 | 1-8 | 5-36 | 7-13 | 3-4 |
| 1988 | Collierstown Highlanders | 28-3 | 9-6 | 5-39 | 14-19 | 7-4 |
| 1988 | Carolina Bandits | 31-10 | 5-3 | 4-37 | 17-17 | 8-6 |
| 1988 | Hatteras Pelicans | 27-6 | 11-3 | 4-45 | 14-14 | 5-4 |
| 1988 | Cuyahoga River Flames | 27-3 | 6-4 | 4-46 | 13-11 | 7-1 |
| 1988 | Evanston Black Sox | 20-3 | 7-4 | 3-53 | 13-14 | 3-8 |