This category is a list of all the professional minor leagues that are listed in the Open Directory Project.
A
This category is for Single-A level professional minor league baseball, both full season and short season leagues.
California League,
Carolina League,
Florida State League,
Midwest League,
New York-Penn League,
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AA
This category is for Double-A level professional minor league baseball.
Eastern League,
Southern League,
Texas League,
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AAA
This category is for Triple-A level professional minor league baseball.
International League,
Mexican League,
Pacific Coast League,
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Independent
Independent leagues are professional leagues that have no formal affiliation with Major League Baseball. The level of play is usually comparable to Single-A or Rookie level ball in the affiliated minor leagues.
American Association,
Atlantic League,
Can-Am League,
Central League,
Frontier League,
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Rookie
This category is for Rookie level professional minor league baseball.
Appalachian League,
Pioneer League,
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