Last Time the Seattle Mariners Won a MLB Playoff Series

Seattle Mariners' Julio Rodriguez reacts to hitting an RBI double to score J.P. Crawford as Los Angeles Angels second baseman Christian Moore, right, look on during the fourth inning of a baseball game Sunday, Sept. 14, 2025, in Seattle.
(AP Photo/Lindsey Wasson)

The Seattle Mariners last won a playoff series in 2022, recording a 2-0 victory over the Toronto Blue Jays in the American League wild card round.

Before that, Seattle hadn’t won a playoff series since 2001.

Last Time the Seattle Mariners Won an AL Pennant

The Mariners have never won the American League pennant in the history of their franchise since 1977.

Seattle has made it to the ALCS three times, losing in 1995, 2000, and 2001.

Last Time the Seattle Mariners Won the World Series

The Mariners are one of five teams never to win the World Series, joining a list that includes the San Diego Padres, Milwaukee Brewers, Colorado Rockies, and Tampa Bay Rays.

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About the Author Read More @ShaneThurston25

Shane Thurston is a Web Content Writer for BetMGM, covering MLB and NBA. After graduating from the University of Kansas, his previous stops include MLB.com, Lawrence Journal-World, Manhattan Mercury, Bet Chicago Sports, WynnBET, and Sportsbook Review.

Shane Thurston is a Web Content Writer for BetMGM, covering MLB and NBA. After graduating from the University of Kansas, his previous stops include MLB.com, Lawrence Journal-World, Manhattan Mercury, Bet Chicago Sports, WynnBET, and Sportsbook Review.