1998 Seattle Mariners season Game log September

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| September 23 | Oakland Athletics | 3-8 | Slocumb (2-5) | 21182 | 74-83 |
| September 24 | Texas Rangers | 3-9 | Suzuki (1-2) | 22891 | 74-84 |
| September 25 | Texas Rangers | 15-4 | Loaiza (9-11) | 39325 | 75-84 |
| September 26 | Texas Rangers | 5-2 | Gunderson (0-3) | 33147 | 76-84 |
| September 27 | Texas Rangers | 6-12 | Spoljaric (4-6) | 37986 | 76-85 |