Triple-A Minor League

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Wikipedia - Triple-A (baseball)

Triple-A (officially Class AAA) is the highest level of play in Minor League Baseball in the United States since 1946. Currently, two leagues operate at the Triple-A level, Triple-A East and Triple-A West, with a total of 30 teams, 20 in the East and 10 in the West. Triple-A teams can be located both in smaller cities as well as larger metropolitan areas without Major League Baseball teams, such as Austin, Jacksonville, Columbus, and Charlotte.

All current Triple-A teams are located in the United States; before 2008, some Triple-A leagues also fielded teams in Canada, and from 1967 to 2020 the Mexican League was classified as Triple-A. Other than the current two Triple-A leagues, only five other leagues have ever held the classification.