Major League Baseball (MLB) is a professional baseball organization and the oldest major professional sports league in the world.  MLB is composed of 30 teams, divided equally between the National League (NL) and the American League (AL), with 29 in the United States and 1 in Canada.
How many teams are in the MLB National League
The National League (NL) consists of 15 teams aligned in three divisions. In the NL East are the Atlanta Braves, Miami Marlins, New York Mets, Philadelphia Phillies, and Washington (D.C.) Nationals. In the NL Central are the Chicago Cubs, Cincinnati Reds, Milwaukee Brewers, Pittsburgh Pirates, and St. Louis Cardinals.