1998 Seattle Mariners season Game log April

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| April 1 | Cleveland Indians | 7-9 | Moyer (0-1) | 24523 | 0-2 |
| April 3 | Boston Red Sox | 11-6 | Lowe (0-1) | 27555 | 1-2 |
| April 4 | Boston Red Sox | 12-6 | Rose (0-1) | 43035 | 2-2 |
| April 5 | Boston Red Sox | 5-10 | Johnson (0-1) | 35143 | 2-3 |
| April 6 | New York Yankees | 8-0 | Pettitte (0-2) | 27445 | 3-3 |
| April 7 | New York Yankees | 7-13 | Bullinger (0-1) | 28424 | 3-4 |
| April 8 | New York Yankees | 3-4 | Ayala (0-1) | 33922 | 3-5 |
| April 10 | @ Boston Red Sox | 7-9 | Timlin (0-1) | 32805 | 3-6 |
| April 11 | @ Boston Red Sox | 0-5 | Moyer (1-2) | 32403 | 3-7 |