2025 American League Championship Series

The 2025 American League Championship Series (ALCS) was the best-of-seven playoff in Major League Baseball's 2025 postseason between the top-seeded Toronto Blue Jays and the second-seeded Seattle Mariners for the American League (AL) pennant and the right to play in the 2025 World Series. The series began on October 12 and ended with a 4–3 Blue Jays victory in a Game 7 win on October 20, highlighted by a seventh-inning go-ahead three-run home run by George Springer, the first go-ahead home run while trailing by multiple runs in the seventh inning or later in Game 7 history. Vladimir Guerrero Jr. won the ALCS MVP. It marked the sixth time that two expansion teams have met in the ALCS, and was the second postseason meeting for the two teams since their matchup in the 2022 American League Wild Card Series; they were both the teams added to the league in its 1977 expansion. The Mariners were trying to reach the World Series for the first time in franchise history; they are the only major league team who have never played in that series. It was the first time the ALCS has featured two teams that have each played at least thirty years since reaching the World Series or never reaching it before in that timespan. Fox and FS1 (including their Fox One streaming service) televised the games in the United States. Sportsnet (including its Sportsnet+ streaming service) televised the games in Canada in English, while TVA Sports broadcast the series in French. Select games also aired in Canada on Sportsnet's sibling broadcast network Citytv.