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.
World Series
During this seven-year period, only three teams won the World Series: the Oakland Athletics from 1972 to 1974, Cincinnati Reds in 1975 and 1976, and New York Yankees in 1977 and 1978. This is the only time in World Series history in which three teams have won consecutive series in succession. This period was book-ended by World Championships for the Pittsburgh Pirates, in 1971 and 1979.