Major League Baseball

Major League Baseball (MLB) is a professional baseball league with teams in the United States of America and Canada. It consists of two different leagues, the American League (AL), established in 1901, and the National League (NL), established in 1876. Since 2000, the two leagues have existed as a single organization under the Commissioner of Baseball.

MLB has 30 teams, 15 in each league. Of these teams, 29 are in the United States and one is in Canada. The regular season consists of 162 games for each team and runs from late March or early April to late September or early October. At the end of the regular season, five teams in each league advance to the postseason, which ends in late October with the World Series, a seven-game series between the winner of the AL and the winner of the NL.