| Year | Team Name | League | Division | Affilate | W | L | Pct | Rank | Managers | Stadium | Playoffs | |
| 1996 | Bellingham | Giants | Nwst | North | SF | 39 | 36 | .520 | 2 | Shane Turner Ozzie Virgil | Joe Martin Field | dnq |
| 1995 | Bellingham | Giants | Nwst | North | SF | 43 | 33 | .566 | 1 | Glenn Tufts | Joe Martin Field | Lost in Finals |
| 1994 | Bellingham | Mariners | Nwst | North | SEA | 42 | 34 | .553 | 2 | Mike Goff | Joe Martin Field | dnq |
| 1993 | Bellingham | Mariners | Nwst | North | SEA | 44 | 32 | .579 | 1 | Mike Goff | Joe Martin Field | Lost in Finals |
| 1992 | Bellingham | Mariners | Nwst | Northern | SEA | 43 | 33 | .566 | 1 | Dave Myers | Joe Martin Field | League Champions |
| 1991 | Bellingham | Mariners | Nwst | Northern | SEA | 37 | 39 | .487 | 2 | Dave Myers | Joe Martin Field | dnq |
| 1990 | Bellingham | Mariners | Nwst | Northern | SEA | 32 | 44 | .421 | 4 | P.J. Carey | Joe Martin Field | dnq |
| 1989 | Bellingham | Mariners | Nwst | Northern | SEA | 32 | 43 | .427 | 3 | P.J. Carey | Joe Martin Field | dnq |
| 1988 | Bellingham | Mariners | Nwst | Northern | SEA | 25 | 51 | .329 | 4 | P.J. Carey | Joe Martin Field | dnq |
| 1987 | Bellingham | Mariners | Nwst | Western | SEA | 30 | 46 | .395 | 4 | Rick Sweet | Joe Martin Field | dnq |
| 1986 | Bellingham | Mariners | Nwst | Washington | SEA | 45 | 29 | .608 | 1 | Sal Rende | Joe Martin Field | League Champions |
| 1985 | Bellingham | Mariners | Nwst | Washington | SEA | 39 | 35 | .527 | 2 | Gary Pellant | Joe Martin Field | dnq |
| 1984 | Bellingham | Mariners | Nwst | Washington | SEA | 42 | 32 | .568 | 2 | Gary Pellant | Joe Martin Field | dnq |
| 1983 | Bellingham | Mariners | Nwst | Washington | SEA | 40 | 28 | .588 | 1 | Jeff Scott | Joe Martin Field | Lost in Finals |
| 1982 | Bellingham | Mariners | Nwst | Northern | SEA | 33 | 37 | .471 | 2 | Roly De Armas | Joe Martin Field | dnq |
| 1981 | Bellingham | Mariners | Nwst | Northern | SEA | 39 | 31 | .557 | 1 | Jeff Scott | Joe Martin Field | Lost in Finals |
| 1980 | Bellingham | Mariners | Nwst | Northern | SEA | 45 | 25 | .643 | 1 | Jeff Scott | Joe Martin Field | Co-League Champions |
| 1979 | Bellingham | Mariners | Nwst | Northern | SEA | 41 | 31 | .569 | 1 | Jeff Scott | Joe Martin Field | dnq |
| 1978 | Bellingham | Mariners | Nwst | Northern | SEA | 41 | 30 | .577 | 3 | Bob Didier | Joe Martin Field | dnq |
| 1977 | Bellingham | Mariners | Nwst | Affiliate | SEA | 42 | 26 | .618 | 1 | dnq | ||