1990 Toronto Blue Jays season Game log September

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| September 1 | @ Indians | 8 - 0 | Candiotti (13-10) | 16547 | 69-64 |
| September 2 | @ Indians | 3 - 0 | Black (10-9) | 23640 | 70-64 |
| September 3 | @ Tigers | 5 - 0 | Key (9-7) | 33658 | 70-65 |
| September 4 | @ Tigers | 3 - 1 | Ward (2-8) | 14760 | 70-66 |
| September 5 | @ Tigers | 7 - 3 | Parker (3-2) | 16677 | 71-66 |
| September 7 | White Sox | 3 - 1 | Pérez (12-13) | 49885 | 72-66 |
| September 8 | White Sox | 3 - 0 | Fernandez (2-3) | 49898 | 73-66 |
| September 9 | White Sox | 6 - 1 | McDowell (12-7) | 49870 | 74-66 |
| September 10 | @ Royals | 6 - 1 | Wagner (0-1) | 22158 | 75-66 |