Major League Baseball (MLB) is a professional baseball organization that consists of 30 teams, divided between the American League (AL) and the National League (NL). It is recognized as the highest level of professional baseball in North America and one of the major sports leagues in the United States and Canada. The American League is organized into three divisions: East, Central, and West. Teams in the AL include the Baltimore Orioles, Boston Red Sox, New York Yankees, Tampa Bay Rays, and Toronto Blue Jays. The Central Division features the Chicago White Sox, Cleveland Guardians, Detroit Tigers, Kansas City Royals, and Minnesota Twins. The West Division includes the Houston Astros, Los Angeles Angels, Oakland Athletics, Seattle Mariners, and Texas Rangers. The National League is similarly divided into three divisions: East, Central, and West. The NL East includes the Atlanta Braves, Miami Marlins, New York Mets, and Philadelphia Phillies. The Central Division consists of the Chicago Cubs, Cincinnati Reds, Milwaukee Brewers, Pittsburgh Pirates, and St. Louis Cardinals. The West Division features the Arizona Diamondbacks, Colorado Rockies, Los Angeles Dodgers, San Diego Padres, and San Francisco Giants. The structure of these divisions ensures competitive balance and regional rivalries, which are integral to the league's appeal.