The 1989 Seattle Mariners season was their 13th since the franchise creation, and the team finished sixth in the American League West, with a record of 73–89 (.451).
The Mariners were led by first-year manager Jim Lefebvre and the season was enlivened by the arrival of nineteen-year-old Ken Griffey Jr., the first overall pick of the 1987 draft.
Infielders Other Batters Coaches Note: Pos = Position; G = Games played; AB = At bats; R = Runs scored; H = Hits; HR = Home runs; RBI = Runs batted in; Avg.
= Batting average; SB = Stolen bases Note: G = Games played; AB = At bats; H = Hits; Avg.
= Batting average; HR = Home runs; RBI = Runs batted in Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts Note: G = Games pitched; IP = Innings pitched; W = Wins; L = Losses; ERA = Earned run average; SO = Strikeouts Note: G = Games pitched; W = Wins; L = Losses; SV = Saves; ERA = Earned run average; SO = Strikeouts