1988 Toronto Blue Jays season Game log September

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| September 11 | @ Orioles | 4 - 2 | Flanagan (11-13) | 19364 | 72-71 |
| September 12 | Tigers | 6 - 5 | Henke (3-4) | 31354 | 72-72 |
| September 13 | Tigers | 9 - 1 | Power (5-7) | 32141 | 73-72 |
| September 14 | Tigers | 3 - 2 | Terrell (7-14) | 32469 | 74-72 |
| September 15 | Indians | 3 - 0 | Walker (0-1) | 28544 | 75-72 |
| September 16 | Indians | 4 - 3 (10) | Gordon (2-4) | 30276 | 76-72 |
| September 17 | Indians | 12 - 3 | Key (10-5) | 32067 | 76-73 |
| September 18 | Indians | 4 - 0 | Nichols (1-5) | 34422 | 77-73 |
| September 19 | Red Sox | 5 - 4 | Lamp (6-5) | 28455 | 78-73 |
| September 20 | Red Sox | 13 - 2 | Musselman (6-5) | 30352 | 78-74 |