1991
From SABR Encyclopedia
Leagues active in 1991
- 1991 American Association
- 1991 American League
- 1991 Appalachian League
- 1991 Arizona Instructional League
- 1991 Arizona League
- 1991 Australian Baseball League
- 1991 California League
- 1991 Carolina League
- 1991 Chinese Professional Baseball League
- 1991 Dominican Summer League
- 1991 Dominican Winter League
- 1991 Eastern League
- 1991 Florida Instructional League
- 1991 Florida State League
- 1991 Gulf Coast League
- 1991 International League
- 1991 Japan Central League
- 1991 Japan Pacific League
- 1991 Korean Baseball Organization
- 1991 Mexican League
- 1991 Mexican Pacific Winter League
- 1991 Midwest League
- 1991 National League
- 1991 New York-Pennsylvania League
- 1991 Northwest League
- 1991 Pacific Coast League
- 1991 Pioneer League
- 1991 Puerto Rican Winter League
- 1991 South Atlantic League
- 1991 Southern League
- 1991 Texas League
- 1991 Venezuelan Winter League