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
The 19th-century competitions are, however, not officially recognized as part of World Series history by Major League Baseball, as it considers 19th-century baseball to be a prologue to the modern baseball era. Until about 1960, some sources treated the 19th-century Series on an equal basis with the post-19th-century series. After about 1930, however, many authorities list the start of the World Series in 1903 and discuss the earlier contests separately.