Major League Baseball
"MLB" redirects here. For Minor League Baseball, see Minor League Baseball. For other uses, see MLB (disambiguation). Major League Baseball Current season, competition or edition: 2018 Major League Baseball season Sport Baseball Founded 1903 ; 115 years ago ( 1903 ) [1] (National League, 1876) [2] (American League, 1901) [2] Commissioner Rob Manfred [3] No. of teams 30 [4] Countries United States (29 teams) Canada (1 team) Headquarters New York City, New York, United States Most recent champion(s) Houston Astros (1st title) Most titles New York Yankees (27 titles) [5] TV partner(s) United States: Fox/FS1 TBS ESPN/ESPN2 MLB Network Canada: Sportsnet RDS TVA Sports TSN/TSN2 MLB Network Official website mlb.com Major League Baseball ( MLB ) is a professional baseball organization, the oldest of the four major professional sports leagues in the United States and Canada. A total of 30 teams play in the National League (NL) and American League (AL), with 15 teams in each league. ...