1990 Toronto Blue Jays season Game log May

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| May 11 | @ Tigers | 4 - 2 | Dubois (0-2) | 17376 | 18-13 |
| May 12 | @ Tigers | Postponed (rain) Rescheduled for May 14 | Postponed (rain) Rescheduled for May 14 | Postponed (rain) Rescheduled for May 14 | Postponed (rain) Rescheduled for May 14 |
| May 13 | @ Tigers | 6 - 3 | Morris (2-5) | 17068 | 19-13 |
| May 14 | @ Tigers | 8 - 3 (10) | Henneman (0-3) | 10833 | 20-13 |
| May 15 | Mariners | 4 - 3 (10) | Acker (0-1) | 41108 | 20-14 |
| May 16 | Mariners | 4 - 2 | Stottlemyre (4-4) | 45640 | 20-15 |
| May 17 | Mariners | 14 - 6 | Key (4-2) | 47283 | 20-16 |
| May 18 | Angels | 4 - 2 | Stieb (5-2) | 49339 | 20-17 |