List of World Series champions
The World Series is the annual championship series of Major League Baseball (MLB) and concludes the MLB postseason. First played in 1903, the World Series championship is determined through a best-of-seven playoff and is a contest between the champions of baseball's National League (NL) and American League (AL). Often referred to as the "Fall Classic", the modern World Series has been played every year since 1903 with two exceptions: in 1904, when the NL champion New York Giants declined to play the AL champion Boston Americans; and in 1994, when the series was canceled due to the players' strike.
1972 World Series
The A's won the American League West division by 5½ games over the Chicago White Sox, then defeated the Detroit Tigers three games to two in the American League Championship Series. The Cincinnati Reds won the National League West division by 10½ games over both the Los Angeles Dodgers and the Houston Astros. The Reds dethroned the defending World Series champion Pittsburgh Pirates three games to two in the National League Championship Series, marking the first year in which an LCS series in either league went the full five games since divisional play was introduced in . The Reds () won one less game than the Pirates () during the strike-reduced regular season and became the first team in MLB history to reach the World Series without having the best record in its respective league. In each of the first six League Championship Series, the team with the better record advanced to the World Series. (The A's () had the best record in the American League in 1972, but the AL pennant winner the next three seasons did not.)