Leagues in blue are active. Click here to read a note about my research.
| National Association | 1871 - 1875 | NA |
| National League | 1876 - | NL |
| American Association | 1882 - 1891 | AA |
| Union Association | 1884 | UA |
| Players League | 1890 | PL |
| American League | 1901 - | AL |
| National Association of Colored Professional Clubs of the United States and Cuba | 1907 | NACPC |
| Federal League | 1914 - 1915 | FL |
| Negro National League | 1920 - 1931 | NNL1 |
| Eastern Colored League | 1923 - 1928 | ECL |
| American Negro League | 1929 | ANL |
| Negro Southern League | 1932 | NSL |
| Negro East-West League | 1932 | NEWL |
| Negro National League | 1933 - 1948 | NNL2 |
| Negro American League | 1937 - 1954 | NAL |
| All American Girls Professional Baseball League | 1943 - 1954 | AAGPBL |
| Pacific Coast League | 1952 - 1957 | PCL |
© 2003-12 Paul Healey.