Bellingham signed a player development contract with Seattle and adopted their parent club's identity, taking the name Mariners.
The Baby M's held off the Mavericks by a score of 4–2 in the decisive game to claim the 1977 Northwest League crown.
The decisive third game was cancelled due to rain; as a result, the Mariners and Emeralds were named co-champions of the Northwest League.
Two seasons later in 1983, with a roster that included future Hall of Famer Edgar Martinez, the Mariners claimed the division title with a 40-28 record.
In 1987, 17-year-old Ken Griffey Jr. hit his first professional home run while on the road at Everett Memorial Stadium on June 18.
Since 1999, the ballpark serves as the home of the Bellingham Bells of the collegiate summer West Coast League.