in the United States and Canada, consisting of teams that play in the National League
and the American League
. The two leagues
merged in 2000 into a single MLB organization led by the Commissioner of Baseball
after 100 years as separate legal entities.
MLB constitutes one of the major professional sports leagues of the United States and Canada. It is composed of 30 teams
— 29 in the United States and 1 in Canada.
1876 The National League of Professional Baseball Clubs of Major League Baseball is formed.
1914 Babe Ruth makes his debut in Major league baseball.
1920 Ray Chapman of the Cleveland Indians is hit on the head by a fastball thrown by Carl Mays of the New York Yankees, and dies early the next day. To date, Chapman is the second player to die from injuries sustained in a Major League Baseball game, the first being Doc Powers in 1909.
1935 The first night game in Major League Baseball history is played in Cincinnati, Ohio, with the Cincinnati Reds beating the Philadelphia Phillies 2-1 at Crosley Field.
1939 The first Major League Baseball game is telecast, a doubleheader between the Cincinnati Reds and the Brooklyn Dodgers at Ebbets Field, in Brooklyn, New York.
1941 Bob Feller of the Cleveland Indians throws the only Opening Day no-hitter in the history of Major League Baseball, beating the Chicago White Sox 1-0.
1941 Joe DiMaggio hits safely for the 56th consecutive game, a streak that still stands as a MLB record.
1951 The "Shot Heard 'Round the World", one of the greatest moments in Major League Baseball history, occurs when the New York Giants' Bobby Thomson hits a game winning home run in the bottom of the ninth inning off of the Brooklyn Dodgers pitcher Ralph Branca, to win the National League pennant after being down 14 games.
1958 Walter O'Malley's Los Angeles Dodgers host the first Major League Baseball game played on the West Coast of the United States.
1972 Hank Aaron becomes the first player in the history of Major League Baseball to sign a $200,000 contract.