World Series is the annual championship series of Major League Baseball (MLB). It has been contested since 1903 between the champion teams of the American League (AL) and the...
History: World Series ; 1903: After two years of discord between the long-established National League and the upstart American League, the two circuits settled their differences and agreed to a postseason series to crown an Interleague champion, a best-of-nine "World's Championship Series." · 1905: The NL champion Giants refused to play the 1904 AL champ Boston Pilgrims in a postseason series, but starting in 1905, the World Series was established as an annual tradition, with 1994...