| Divisional | ||||||||||||||||
| Year | Team | W | L | Pct | GB | L10 | Strk | Recent | RF | RA | Mgn | Mgc | Pythag | PD | Div | |
| AL |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| 1990 | River City Rhinos | 102 | 60 | .630 | - |   | 6-4 | L1 | lwwllwwwwl | 800 | 693 | 107 | 0 | 93-69 | 9 | 62-36 |
| 1990 | Hanover-Horton Heffalumps | 90 | 72 | .556 | 12 |   | 5-5 | W1 | wlwwwllllw | 778 | 721 | 57 |   | 87-75 | 3 | 53-45 |
| 1990 | Bloom County Losers | 85 | 77 | .525 | 17 |   | 7-3 | W3 | wwwllwwlww | 679 | 654 | 25 |   | 84-78 | 1 | 50-48 |
| 1990 | Ilion Golden Bombers | 81 | 81 | .500 | 21 |   | 7-3 | W1 | wllwwwlwww | 778 | 786 | -8 |   | 80-82 | 1 | 49-49 |
| 1990 | Boston Stranglers | 78 | 84 | .481 | 24 |   | 5-5 | L1 | lwlwwlwllw | 666 | 687 | -21 |   | 78-84 | 0 | 54-44 |
| 1990 | St Louis Perfectos | 78 | 84 | .481 | 24 |   | 1-9 | L8 | llllllllwl | 708 | 758 | -50 |   | 75-87 | 3 | 44-54 |
| 1990 | Palos Hills Pit Vipers | 78 | 84 | .481 | 24 |   | 7-3 | W5 | wwwwwlwwll | 722 | 769 | -47 |   | 76-86 | 2 | 48-50 |
| 1990 | Pittsburgh SmokinBats | 60 | 102 | .370 | 42 |   | 2-8 | L5 | lllllwlwll | 639 | 742 | -103 |   | 69-93 | -9 | 32-66 |
|   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| NL |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| 1990 | Useless Bay Water Apes | 101 | 61 | .623 | - |   | 6-4 | W1 | wlwwlwlwwl | 816 | 579 | 237 | 0 | 108-54 | -7 | 64-34 |
| 1990 | Chicago Whales | 91 | 71 | .562 | 10 |   | 6-4 | W1 | wlllwwwwlw | 648 | 598 | 50 |   | 87-75 | 4 | 55-43 |
| 1990 | Gotham City Ghosts | 88 | 74 | .543 | 13 |   | 4-6 | L2 | llwwllwllw | 759 | 662 | 97 |   | 92-70 | -4 | 52-46 |
| 1990 | Troy Trojans | 84 | 78 | .519 | 17 |   | 4-6 | L1 | lwllwwwlll | 788 | 736 | 52 |   | 87-75 | -3 | 53-45 |
| 1990 | Topeka Tornados | 83 | 79 | .512 | 18 |   | 5-5 | W2 | wwllwlllww | 610 | 603 | 7 |   | 82-80 | 1 | 50-48 |
| 1990 | Carmel Crush | 67 | 95 | .414 | 34 |   | 5-5 | L1 | lwwlwllwwl | 675 | 796 | -121 |   | 68-94 | -1 | 42-56 |
| 1990 | Winnipeg Goldeyes | 66 | 96 | .407 | 35 |   | 6-4 | W1 | wlwwlwllww | 587 | 679 | -92 |   | 69-93 | -3 | 40-58 |
| 1990 | Toledo Mud Hens | 64 | 98 | .395 | 37 |   | 4-6 | L1 | lwlwllwwll | 665 | 855 | -190 |   | 61-101 | 3 | 36-62 |
| Wildcard | ||||||||||||||
| Year | Team | W | L | Pct | GB | Strk | Pythag | Overall | PyPct | OvPct | PD | 1-run | Extra | Mgc |
| AL |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| 1990 | River City Rhinos | 102 | 60 | .630 | na | L1 | 93-69 | 102-60 | .571 | .630 | 9 | 40-19 | 15-8 |   |
| 1990 | Hanover-Horton Heffalumps | 90 | 72 | .556 | - | W1 | 87-75 | 90-72 | .538 | .556 | 3 | 31-26 | 13-11 | 0 |
| 1990 | Bloom County Losers | 85 | 77 | .525 | 5 | W3 | 84-78 | 85-77 | .519 | .525 | 1 | 32-36 | 13-13 |   |
| 1990 | Ilion Golden Bombers | 81 | 81 | .500 | 9 | W1 | 80-82 | 81-81 | .495 | .500 | 1 | 22-22 | 7-8 |   |
| 1990 | Boston Stranglers | 78 | 84 | .481 | 12 | L1 | 78-84 | 78-84 | .484 | .481 | 0 | 31-26 | 16-13 |   |
| 1990 | St Louis Perfectos | 78 | 84 | .481 | 12 | L8 | 75-87 | 78-84 | .466 | .481 | 3 | 26-27 | 15-11 |   |
| 1990 | Palos Hills Pit Vipers | 78 | 84 | .481 | 12 | W5 | 76-86 | 78-84 | .469 | .481 | 2 | 21-28 | 9-11 |   |
| 1990 | Pittsburgh SmokinBats | 60 | 102 | .370 | 30 | L5 | 69-93 | 60-102 | .426 | .370 | -9 | 19-36 | 5-18 |   |
|   |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| NL |   |   |   |   |   |   |   |   |   |   |   |   |   |   |
| 1990 | Useless Bay Water Apes | 101 | 61 | .623 | na | W1 | 108-54 | 101-61 | .665 | .623 | -7 | 25-25 | 8-12 |   |
| 1990 | Chicago Whales | 91 | 71 | .562 | - | W1 | 87-75 | 91-71 | .540 | .562 | 4 | 31-27 | 9-5 | 0 |
| 1990 | Gotham City Ghosts | 88 | 74 | .543 | 3 | L2 | 92-70 | 88-74 | .568 | .543 | -4 | 22-32 | 11-10 |   |
| 1990 | Troy Trojans | 84 | 78 | .519 | 7 | L1 | 87-75 | 84-78 | .534 | .519 | -3 | 30-24 | 13-5 |   |
| 1990 | Topeka Tornados | 83 | 79 | .512 | 8 | W2 | 82-80 | 83-79 | .506 | .512 | 1 | 30-28 | 13-12 |   |
| 1990 | Carmel Crush | 67 | 95 | .414 | 24 | L1 | 68-94 | 67-95 | .418 | .414 | -1 | 27-28 | 7-9 |   |
| 1990 | Winnipeg Goldeyes | 66 | 96 | .407 | 25 | W1 | 69-93 | 66-96 | .428 | .407 | -3 | 27-35 | 10-17 |   |
| 1990 | Toledo Mud Hens | 64 | 98 | .395 | 27 | L1 | 61-101 | 64-98 | .377 | .395 | 3 | 22-17 | 6-7 |   |
| Expanded1 | |||||||||
| Year | Team | Home | Road | Grass | Turf | vsLHP | vsRHP | Div | InterLg |
| AL |   |   |   |   |   |   |   |   |   |
| 1990 | River City Rhinos | 57-24 | 45-36 | 81-42 | 21-18 | 28-22 | 74-38 | 62-36 | 40-24 |
| 1990 | Hanover-Horton Heffalumps | 51-30 | 39-42 | 68-55 | 22-17 | 27-24 | 63-48 | 53-45 | 37-27 |
| 1990 | Bloom County Losers | 44-37 | 41-40 | 25-24 | 60-53 | 17-24 | 68-53 | 50-48 | 35-29 |
| 1990 | Ilion Golden Bombers | 42-39 | 39-42 | 22-27 | 59-54 | 30-26 | 51-55 | 49-49 | 32-32 |
| 1990 | Boston Stranglers | 45-36 | 33-48 | 57-66 | 21-18 | 28-23 | 50-61 | 54-44 | 24-40 |
| 1990 | St Louis Perfectos | 41-40 | 37-44 | 19-30 | 59-54 | 24-24 | 54-60 | 44-54 | 34-30 |
| 1990 | Palos Hills Pit Vipers | 42-39 | 36-45 | 22-27 | 56-57 | 29-22 | 49-62 | 48-50 | 30-34 |
| 1990 | Pittsburgh SmokinBats | 38-43 | 22-59 | 15-34 | 45-68 | 22-20 | 38-82 | 32-66 | 28-36 |
|   |   |   |   |   |   |   |   |   |   |
| NL |   |   |   |   |   |   |   |   |   |
| 1990 | Useless Bay Water Apes | 55-26 | 46-35 | 81-54 | 20-7 | 28-16 | 73-45 | 64-34 | 37-27 |
| 1990 | Chicago Whales | 48-33 | 43-38 | 75-60 | 16-11 | 35-30 | 56-41 | 55-43 | 36-28 |
| 1990 | Gotham City Ghosts | 45-36 | 43-38 | 71-64 | 17-10 | 26-28 | 62-46 | 52-46 | 36-28 |
| 1990 | Troy Trojans | 48-33 | 36-45 | 71-64 | 13-14 | 28-32 | 56-46 | 53-45 | 31-33 |
| 1990 | Topeka Tornados | 42-39 | 41-40 | 68-67 | 15-12 | 33-14 | 50-65 | 50-48 | 33-31 |
| 1990 | Carmel Crush | 37-44 | 30-51 | 54-81 | 13-14 | 24-35 | 43-60 | 42-56 | 25-39 |
| 1990 | Winnipeg Goldeyes | 34-47 | 32-49 | 57-78 | 9-18 | 29-31 | 37-65 | 40-58 | 26-38 |
| 1990 | Toledo Mud Hens | 32-49 | 32-49 | 24-37 | 40-61 | 24-32 | 40-66 | 36-62 | 28-36 |
| Expanded2 | ||||||
| Year | Team | Lead7 | Tied7 | Trail7 | 1-run | Extra |
| AL |   |   |   |   |   |   |
| 1990 | River City Rhinos | 82-10 | 10-5 | 10-45 | 40-19 | 15-8 |
| 1990 | Hanover-Horton Heffalumps | 63-5 | 15-10 | 12-57 | 31-26 | 13-11 |
| 1990 | Bloom County Losers | 65-7 | 11-12 | 9-58 | 32-36 | 13-13 |
| 1990 | Ilion Golden Bombers | 62-8 | 9-7 | 10-66 | 22-22 | 7-8 |
| 1990 | Boston Stranglers | 57-5 | 16-13 | 5-66 | 31-26 | 16-13 |
| 1990 | St Louis Perfectos | 52-9 | 18-15 | 8-60 | 26-27 | 15-11 |
| 1990 | Palos Hills Pit Vipers | 63-9 | 10-9 | 5-66 | 21-28 | 9-11 |
| 1990 | Pittsburgh SmokinBats | 47-12 | 7-20 | 6-70 | 19-36 | 5-18 |
|   |   |   |   |   |   |   |
| NL |   |   |   |   |   |   |
| 1990 | Useless Bay Water Apes | 84-14 | 7-12 | 10-35 | 25-25 | 8-12 |
| 1990 | Chicago Whales | 69-4 | 12-8 | 10-59 | 31-27 | 9-5 |
| 1990 | Gotham City Ghosts | 71-12 | 8-7 | 9-55 | 22-32 | 11-10 |
| 1990 | Troy Trojans | 66-11 | 15-12 | 3-55 | 30-24 | 13-5 |
| 1990 | Topeka Tornados | 57-4 | 15-15 | 11-60 | 30-28 | 13-12 |
| 1990 | Carmel Crush | 48-9 | 6-6 | 13-80 | 27-28 | 7-9 |
| 1990 | Winnipeg Goldeyes | 50-12 | 11-15 | 5-69 | 27-35 | 10-17 |
| 1990 | Toledo Mud Hens | 48-6 | 5-9 | 11-83 | 22-17 | 6-7 |