1998 Seattle Mariners season Game log May

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| May 23 | Tampa Bay Devil Rays | 3-6 | Ayala (0-4) | 35819 | 21-27 |
| May 24 | Tampa Bay Devil Rays | 3-1 | Springer (1-8) | 46867 | 22-27 |
| May 25 | Baltimore Orioles | 12-4 | Rodriguez (0-2) | 28375 | 23-27 |
| May 26 | Baltimore Orioles | 3-8 | Fassero (5-2) | 31164 | 23-28 |
| May 28 | @ Tampa Bay Devil Rays | 5-2 | Johnson (2-2) | 27017 | 24-28 |
| May 29 | @ Tampa Bay Devil Rays | 6-2 | Saunders (1-5) | 32142 | 25-28 |
| May 30 | @ Tampa Bay Devil Rays | 2-5 | Cloude (3-3) | 40212 | 25-29 |
| May 31 | @ Tampa Bay Devil Rays | 11-6 | White (0-1) | 35184 | 26-29 |