1998 Seattle Mariners season

Their record was 76–85 (.472) and they finished in third place in the four-team American League West, 11½ games behind the champion Texas Rangers.

[1] The Mariners were the defending division champions, but exceeded the .500 mark only once during the season; at 19–18 after a win at Detroit on May 12.

[2] On July 18 at the Kingdome, Seattle (crimson, silver, and black) and the Kansas City Royals (yellow gold and blue) played a game in futuristic uniforms for "Turn Ahead the Clock" night.

Shortstop Alex Rodriguez hit a three-run homer in the seventh inning and the Mariners won by three.

[3][4] Ken Griffey Jr. hit 56 home runs to tie his franchise record set the year before;[5] Rodriguez hit 42 home runs and stole 46 bases to become the third member of the 40/40 club, joining Jose Canseco (1988) and Barry Bonds (1996).