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There are two different types of professional baseball in the U.S. -- Major League Baseball (MLB) and its affiliated Minor League Baseball system, and independent league or non-affiliated MLB of which there are seven leagues. There are also thousands of U.S. amateur high school and college teams.
MLB and Minor League Baseball overview: Comprised of 30 teams separated in two leagues. The American League, founded in 1901, features 14 teams while the National League, founded ...
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