2003 Toronto Blue Jays season Game log August

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| August 11 | @ Mariners | 5 - 3 | Piñeiro (13-7) | 44922 | 59-59 |
| August 12 | @ Mariners | 3 - 1 | Halladay (16-4) | 37018 | 59-60 |
| August 13 | @ Mariners | 13 - 6 | Kershner (0-2) | 37066 | 59-61 |
| August 14 | @ Mariners | 5 - 2 | Meche (13-8) | 41945 | 60-61 |
| August 15 | @ Athletics | 8 - 5 | Harden (3-2) | 17446 | 61-61 |
| August 16 | @ Athletics | 6 - 4 | Hendrickson (7-9) | 31045 | 61-62 |
| August 17 | @ Athletics | 7 - 3 | Halladay (16-5) | 32488 | 61-63 |
| August 19 | Mariners | 9 - 1 | Escobar (9-7) | 24025 | 61-64 |
| August 20 | Mariners | 5 - 2 | Meche (13-9) | 21588 | 62-64 |
| August 21 | Mariners | 7 - 3 | Moyer (15-6) | 20111 | 63-64 |