The Seattle Mariners play their upcoming games beginning October 12, 2025, with a postseason American League Championship Series (ALCS) against the Toronto Blue Jays. The schedule for their playoff games is:
- October 12, 2025, at Toronto Blue Jays, 8:03 PM (Game 1, ALCS)
- October 13, 2025, at Toronto Blue Jays, time TBD (Game 2, ALCS)
- October 15, 2025, at home vs Toronto Blue Jays, time TBD (Game 3, ALCS)
- October 16, 2025, at home vs Toronto Blue Jays, time TBD (Game 4, ALCS)
- October 17, 2025, at home vs Toronto Blue Jays, time TBD (Game 5, ALCS)
- October 19, 2025, at Toronto Blue Jays, time TBD (Game 6, ALCS)
- October 20, 2025, at Toronto Blue Jays, time TBD (Game 7, ALCS if necessary)
Before this ALCS, the Mariners just finished winning the American League Division Series (ALDS) against the Detroit Tigers in a winner-take-all Game 5 on October 10, 2025. They will also have regular season games that started in April 2025 and continue through the year. If more details on their full regular season schedule or future postseason games are needed, I can provide those as well.
