who do the mariners play

The Seattle Mariners play their next games against the Toronto Blue Jays in the 2025 American League Championship Series (ALCS). The series begins on Sunday, October 12, 2025, with Game 1 taking place at Rogers Centre in Toronto. The Mariners advanced to this round by defeating the Detroit Tigers in a dramatic 15-inning Game 5 of the Division Series. The ALCS schedule includes games both in Toronto and back at the Mariners' home stadium, T-Mobile Park, in Seattle. This matchup pits the top two seeds of the American League against each other, with the Mariners having won the AL West and the Blue Jays winning the AL East.