Formed in 18, respectively, the NL and AL cemented their cooperation with the National Agreement in 1903, making MLB the oldest major professional sports league in the world. One of the major professional sports leagues in the United States and Canada, MLB comprises 30 teams, divided equally between the National League (NL) and the American League (AL), with 29 in the United States and 1 in Canada.
Major League Baseball ( MLB) is a professional baseball organization.
