DIGITALBALLPARKS.COM - Affiliated Minor League Baseball Systems

MINOR LEAGUE SYSTEMS (Past and Present):

TRIPLE A:
- International League
- Pacific Coast League
- American Association (Defunct: 1903-1962; 1969-1997)

DOUBLE A:
- Eastern League
- Southern League
- Texas League

SINGLE A (Advanced)
- California League
- Carolina League
- Florida State League

SINGLE A (Full Season)
- Midwest League
- South Atlantic League
- Alabama Florida League aka Alabama State League (Defunct: 1946-1962)
- Northern League (Defunct: 1946-1970)

SINGLE A (Short Season)
- New York Penn League
- Northwest League

ROOKIE:
- Appalachian League
- Pioneer League

DEFUNCT CLASSIFICATIONS

CLASS A:
- Northern League (Defunct: 1946-1970) *See Single-A

CLASS B:
- Quebec Provincial League (Defunct: 1940)

CLASS C:
- Colonial League (Defunct: 1947-1950)

CLASS D:
- Alabama Florida League / Alabama State League (Defunct: 1946-1962) *See Single-A
- Kitty League (Defunct: 1946-1955)
- KOM League (Defunct: 1946-1952)
- North Atlantic League (Defunct: 1946-1950)