Canal Zone League

Cuban Winter League

Mexican Pacific Winter League

Panama Winter League

Puerto Rican Winter League

Venezuelan Winter League

Independent Negro

Manitoba Senior League

Ohio Valley League

All-American Girls Professional Baseball League

American Association AAA

International League AAA

Pacific Coast League AAA

Southern Association AA

Texas League AA

Central League A

Eastern League A

South Atlantic League A

Western League A

Big State League B

Carolina League B

Colonial League B

Florida International League B

Illinois-Indiana-Iowa League B

Interstate League B

New England League B

Piedmont League B

Southeastern League B

Tri-State League B

Western International League B

Arizona-Texas League C

Border League C

California League C

Canadian-American League C

Central Association C

Cotton States League C

East Texas League C

Evangeline League C

Middle Atlantic League C

Northern League C

Pioneer League C

Sunset League C

West Texas-New Mexico League C

Western Association C

Alabama State League D

Appalachian League D

Blue Ridge League D

Coastal Plain League D

Eastern Shore League D

Far West League D

Florida State League D

Georgia State League D

Georgia-Alabama League D

Georgia-Florida League D

Kansas-Oklahoma-Missouri League D

Kentucky-Illinois-Tennessee League D

Longhorn League D

Mississippi-Ohio Valley League D

Mountain States League D

North Atlantic League D

North Carolina State League D

Ohio-Indiana League D

Pennsylvania-Ontario-New York League D

Rio Grande Valley League D

Sooner State League D

Tobacco State League D

Virginia League D

Western Carolina League D

Wisconsin State League D

Cuban League Foreign

Japanese Baseball League Foreign

Mexican League Independent

Provincial League Independent

Quebec Provincial League Independent

Baseball Association Of America Negro

Negro American League Negro Majors