Back Sèries de Campionat de la Lliga Americana Catalan American League Championship Series German Serie de Campeonato de la Liga Americana Spanish Amerikar Ligako Txapelketa Sailak Basque American League Championship Series Finnish Série de championnat de la Ligue américaine de baseball French American League Championship Series Italian 아메리칸 리그 챔피언십 시리즈 Korean American League Championship Series Malay American League Championship Series Polish
| Part of a series on the |
| Major League Baseball postseason |
|---|
| Wild Card Series |
| Division Series |
| League Championship Series |
| World Series |
| Teams |
The American League Championship Series (ALCS) is a best-of-seven playoff and one of two League Championship Series comprising the penultimate round of Major League Baseball's (MLB) postseason. The winner of the ALCS wins the AL pennant and advances to the World Series, MLB's championship series, to play the winner of the National League's (NL) Championship Series. The ALCS began in 1969 as a best-of-five playoff and used this format until 1985, when it changed to its current best-of-seven format.