1999 Toronto Blue Jays season Game log May

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| May 1 | @ Mariners | 9 - 3 | Moyer (1-4) | 35628 | 14-11 |
| May 2 | @ Mariners | 3 - 2 | Plesac (0-2) | 31355 | 14-12 |
| May 3 | @ Mariners | 16 - 10 | García (3-1) | 22304 | 15-12 |
| May 4 | Athletics | 13 - 4 | Halladay (2-2) | 20258 | 15-13 |
| May 5 | Athletics | 8 - 2 | Escobar (2-1) | 20314 | 15-14 |
| May 6 | Athletics | 3 - 2 | Carpenter (3-2) | 20310 | 15-15 |
| May 7 | Rangers | 9 - 6 | Clark (2-3) | 22110 | 16-15 |
| May 8 | Rangers | 4 - 3 | Wells (4-2) | 24642 | 16-16 |
| May 9 | Rangers | 11 - 6 | Munro (0-1) | 20374 | 16-17 |