The American League Championship Series (ALCS), also known as the American League Pennant, 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.

The League Championship Series Most Valuable Player (MVP) Award is given annually to the Major League Baseball (MLB) players deemed to have the most impact on their teams' performances in each of the two respective League Championship Series that comprise the penultimate round of the MLB postseason. The award is given separately for a player in both the American League Championship Series and the National League Championship Series. It has been presented in the National League (NL) since 1977, and in the American League (AL) since 1980. Dusty Baker won the inaugural award in 1977 with the Los Angeles Dodgers, and Frank White won the first AL award in 1980 with the Kansas City Royals. The ten Hall of Famers to win LCS MVPs include Roberto Alomar, George Brett, Dennis Eckersley, Rickey Henderson, Kirby Puckett, Ozzie Smith, Willie Stargell, John Smoltz, Iván Rodríguez, and Mariano Rivera.