List of Seattle Mariners Opening Day starting pitchers Pitchers Pitchers

| Season | Pitcher | Decision | Opponent | Location_ |
|---|---|---|---|---|
| 1985 | Mike Moore Category:Articles with hCards (2) | W | Oakland Athletics | Kingdome |
| 1986 | Mike Moore Category:Articles with hCards (3) | ND (W) | California Angels | Kingdome |
| 1987 | Mark Langston Category:Articles with hCards | L | California Angels | Anaheim Stadium |
| 1988 | Mark Langston Category:Articles with hCards (2) | L | Oakland Athletics | Network Associates Coliseum |
| 1989 | Mark Langston Category:Articles with hCards (3) | L | Oakland Athletics | Network Associates Coliseum |
| 1990 | Brian Holman Category:Articles with hCards | W | California Angels | Kingdome |
| 1991 | Erik Hanson Category:Articles with hCards | L | California Angels | Kingdome |
| 1992 | Randy Johnson Category:Articles with hCards | ND (L) | Texas Rangers | Kingdome |
| 1993 | Randy Johnson Category:Articles with hCards (2) | W | Toronto Blue Jays | Kingdome |