1999 Toronto Blue Jays season Game log May

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| May 11 | @ Royals | 8 - 2 | Pittsley (1-2) | 12141 | 17-17 |
| May 12 | @ Royals | 7 - 1 | Carpenter (3-3) | 13073 | 17-18 |
| May 13 | @ Royals | 8 - 2 | Rosado (2-2) | 19573 | 18-18 |
| May 14 | Red Sox | 5 - 0 | Wells (4-3) | 22186 | 18-19 |
| May 15 | Red Sox | 6 - 5 | Plesac (0-3) | 24579 | 18-20 |
| May 16 | Red Sox | 9 - 6 | Gross (0-2) | 21094 | 19-20 |
| May 17 | Red Sox | 8 - 7 | Lloyd (3-2) | 20395 | 19-21 |
| May 18 | Tigers | 7 - 5 | Thompson (4-5) | 20310 | 20-21 |
| May 19 | Tigers | 7 - 3 | Wells (4-4) | 20384 | 20-22 |
| May 20 | Tigers | 7 - 0 | Mlicki (1-4) | 21137 | 21-22 |