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 Baseballs postseason. 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. The winner of the ALCS wins the AL pennant and advances to the World Series, MLBs championship series, to play the winner of the National Leagues Championship Series. The ALCS is played between the winners of the Division Series to determine which team will represent the American League in the World Series. Until 1984, the ALCS was a 5-game series between the two division winners, then moved to a best-of-seven format in 1985. Starting in 1995 with the introduction of the wild card, it became possible for two teams from the same division to meet in the ALCS. The ALCS and NLCS, since the expansion to best-of-seven, are always played in a 2–3–2 format: Games 1, 2, 6, and 7 are played in the stadium of the team that has home field advantage, and Games 3, 4, and 5 are played in the stadium of the team that does not. The Milwaukee Brewers, an American League team between 1969 and 1997, and the Houston Astros, a National League team between 1962 and 2012, are the only franchises to play in both the American and National League Championship Series.