Triple-A (baseball)
Minor League Baseball competition level representing highest level of play
Triple-A (officially Class AAA) has been the highest level of play in Minor League Baseball in the United States since 1946. Currently, two leagues operate at the Triple-A level, the International League (IL) and the Pacific Coast League (PCL). There are 30 teams, one per Major League Baseball (MLB) franchise, with 20 in the IL and 10 in the PCL. Triple-A teams are generally located in smaller to mid-size cities which do not have sports teams of the "Big Four" leagues, such as Syracuse, Toledo, Reno and Omaha, as well as larger metropolitan areas without MLB teams that also have a team in another major professional league, such as Jacksonville, Columbus, Buffalo, and Indianapolis. Four Triple-A teams play in the same metro areas as their parent clubs.
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. Reasons for the relocation of these teams were solely because of costs and attendance. Other than the current two Triple-A leagues, only three other leagues have ever held the classification.
History
Prior to 1946, the top level of Minor League Baseball was Double-A, which had been established in 1912. The Triple-A classification was created before the 1946 season, and began with all three leagues then in Double-A moving up to the new level:
American Association (AA)
International League (IL)
Pacific Coast League (PCL)
This structure persisted for the next 75 years with only a few changes:
1952–1957: The PCL was classified as "Open" for these six seasons, in anticipation of it potentially becoming a third major league; once the Brooklyn Dodgers and New York Giants relocated from New York City to California, the PCL returned to Triple-A for the 1958 season.
1963–1968: The AA did not operate during these six seasons.
1967: The Mexican League received Triple-A classification; it had previously been Double-A since 1955
1979: The Inter-American League debuted with a Triple-A classification; the league disbanded in June
1998: Teams from the AA, which disbanded after the 1997 season, were added to the PCL and IL
The IL, PCL, and Mexican League continued as Triple-A leagues until Major League Baseball reorganized the minor leagues prior to the 2021 season.
This brief starts where responsible research should: with the source description of “Triple-A (baseball)” as minor League Baseball competition level representing highest level of play. Everything that follows is an evidence route, not borrowed authority.
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Attribution, date and provenance are strongest when supported by the original work, a catalogue record and documented transmission. The source revision retrieved here is dated Jul 26, 2026. The linked authority identifier is Q5359555. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1946, 2008, 1967 and 2020.
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This entry incorporates text from “Triple-A (baseball)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.