2003 Toronto Blue Jays season Game log May

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| May 21 | @ White Sox | 6 - 5 | Politte (1-3) | 13076 | 23-24 |
| May 22 | @ Yankees | 8 - 3 | Pettitte (4-5) | 45777 | 24-24 |
| May 23 | @ Yankees | 6 - 2 | Mussina (7-3) | 34134 | 25-24 |
| May 24 | @ Yankees | 5 - 2 | Wells (6-2) | 35023 | 26-24 |
| May 25 | @ Yankees | 5 - 3 | Weaver (3-3) | 40940 | 27-24 |
| May 26 | White Sox | 11 - 5 | Buehrle (2-8) | 19009 | 28-24 |
| May 27 | White Sox | 5 - 1 | Colón (5-4) | 19365 | 29-24 |
| May 28 | White Sox | 8 - 0 | Escobar (2-2) | 36806 | 29-25 |
| May 29 | White Sox | 3 - 2 | Lidle (8-3) | 20010 | 29-26 |
| May 30 | Red Sox | 13 - 2 | Burkett (3-3) | 21381 | 30-26 |
| May 31 | Red Sox | 10 - 7 | Fossum (4-4) | 28809 | 31-26 |