1998 Seattle Mariners season Game log April

| Date_ | Opponent | Score | Loss | Attendance | Record |
|---|---|---|---|---|---|
| April 12 | @ Boston Red Sox | 7-8 | Slocumb (0-1) | 23270 | 3-8 |
| April 13 | @ Cleveland Indians | 5-6 | Cloude (1-1) | 42793 | 3-9 |
| April 14 | @ Cleveland Indians | 3-8 | Slocumb (0-2) | 40490 | 3-10 |
| April 15 | @ Cleveland Indians | 5-3 | Assenmacher (1-1) | 40527 | 4-10 |
| April 16 | @ Minnesota Twins | 3-2 | Aguliera (0-2) | 11351 | 5-10 |
| April 17 | @ Minnesota Twins | 11-6 | Milton (2-1) | 18169 | 6-10 |
| April 18 | @ Minnesota Twins | 5-3 | Tewksbury (2-2) | 23943 | 7-10 |
| April 19 | @ Minnesota Twins | 7-4 | Hawkins (0-2) | 15124 | 8-10 |
| April 20 | Kansas City Royals | 8-7 | Rios (0-1) | 38345 | 9-10 |
| April 21 | Kansas City Royals | 3-5 | Fossas (0-2) | 21547 | 9-11 |
| April 22 | Kansas City Royals | 11-5 | Pichardo (0-2) | 22698 | 10-11 |