Stands for Major League Baseball. A North American organization consisting of 30 baseball teams (29 of them are in the U.S. and one is in Canada) and two leagues, the American (AL) and National (NL). The National league is the older of the two leagues and is sometimes refered to as the "Senior Circuit"; The "Junior Circuit" refers to the American League. Each year is concluded with the World Series where the winner of the National League pennant and the winner of the American League pennant play each other in a best of 7 game series.
Notable Teams: New York Yankees, St. Louis Cardinals, Los Angeles Dodgers
Notable Players: Babe Ruth, Willie Mays, Stan Musial, Cy Young, Hank Aaron
The St. Louis Cardinals won last year's MLB World Series.