1998 Seattle Mariners season Game log August

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| August 1 | New York Yankees | 2-5 | Moyer (8-8) | 53840 | 48-61 |
| August 2 | New York Yankees | 6-3 | Cone (15-4) | 47872 | 49-61 |
| August 3 | Boston Red Sox | 3-1 | Wasdin (5-4) | 27887 | 50-61 |
| August 4 | Boston Red Sox | 1-2 | McCarthy (0-2) | 29621 | 50-62 |
| August 7 | @ Detroit Tigers | 6-3 | Crow (1-1) | DH | 51-62 |
| August 7 | @ Detroit Tigers | 7-1 | Moehler (12-8) | 29039 | 52-62 |
| August 8 | @ Detroit Tigers | 9-3 | Powell (2-3) | 37495 | 53-62 |
| August 9 | @ Detroit Tigers | 6-3 | Runyan (1-3) | 27987 | 54-62 |
| August 11 | @ Toronto Blue Jays | 4-7 | Fassero (10-8) | 33137 | 54-63 |