Major League Baseball, MLB, from
1903 to 2000, is the combination of two professional baseball
leagues, the National League and the American League. In 2000,
the American and National Leagues were officially disbanded as
separate legal entities and are now consolidated in the MLB
commissioner's office. MLB was founded in 1876 and currently
has 30 professional teams and 20 minor baseball leagues with 246
member clubs in various cities throughout North America.