| Postseason Series | Leagues | Years of Existance
|
| New England Championship | Connecticut League, New England League | 1903, 1905-1906
|
| Little World Series | American Association, International League | 1904, 1906-1907, 1917, 1920-1931
|
| Iowa State Series | Iowa State League, Three-I League, Western League | 1905
|
| Dixie Championship | South Atlantic League, Virginia League | 1906
|
| Midwest Championship | Iowa State League, Wisconsin State League | 1907
|
| Carolina Championship | Carolina Association, Eastern Carolina League | 1909
|
| Dixie Championship | South Atlantic League, Southern Association | 1909, 1919
|
| New York versus Pennsylvania Series | New York State League, Tri-State League | 1909
|
| Kansas versus Nebraska Series | Eastern Kansas League, MINK League | 1910
|
| Northern Championship | Minnesota-Wisconsin League, Wisconsin-Illinois League | 1910
|
| Carolina versus Virginia Series | Carolina Association, Virginia League | 1911
|
| Class D Series | Blue Grass League, Kentucky-Illinois-Tennessee League | 1912
|
| Western Championship | American Association , Western League | 1912
|
| Virginia Series | Appalachian League, Virginia League | 1912
|
| Class B Championship Series | Eastern Association, New England League | 1913, 1914
|
| Michigan State Championship | Michigan State League, Southern Michigan Association | 1913
|
| Minor League Championship | American Association, Western League | 1913, 1916
|
| Minor League Championship | American Association, Southern Association, Western League | 1914
|
| Virginia-North Carolina Series | North Carolina State League, Virginia League | 1914-1915
|
| Junior World Series | American Association, Pacific Coast League | 1919
|
| Dixie Series | Southern Association, Texas League | 1920-1958
|
| Border Series | Texas-Oklahoma League, Western Association | 1921
|
| Class B Championship Series | Central League, Michigan-Ontario League | 1921
|
| Class D Series | Southwestern League, Western Association | 1921
|
| Little World Series Tune-up | Eastern League, International League | 1922-1925
|
| Class A Series | Western League , Southern Association | 1922
|
| Class B Southern Championship | South Atlantic League, Virginia League | 1922-1923
|
| Five-State Championship | Blue Ridge League, Eastern Shore League | 1922-1927
|
| Lone Star Series | East Texas League, Texas Association | 1924, 1926
|
| Class AA Series | American Association, Pacific Coast League | 1924
|
| San Francisco-Louisville Series | American Association, Pacific Coast League | 1925
|
| Southern Championship | South Atlantic League, Virginia League | 1925-1927
|
| Northern Championship | Three-I League, Michigan State League | 1926
|
| Mid-Western Championship | Three-I League, Western League | 1926
|
| Eastern Championship | New York-Penn League, New England League | 1926
|
| Eastern Championship | New York-Penn League, Eastern League | 1926, 1930
|
| Class B Championship | New York-Penn League, Virginia League | 1927
|
| Eastern Championship | Eastern League, International League | 1927, 1929
|
| Southern Championship | Southeastern League, South Atlantic League | 1927-1928, 1930
|
| Texas Class D Championship | Lone Star League, West Texas League | 1928
|
| Tri-State Series | Middle Atlantic League, Blue Ridge League | 1928-1929
|
| Eastern Series | New England League, Eastern League | 1929
|
| Midwest Championship | Central League, Three-I League | 1929-1930
|
| Junior World Series | American Association, International League | 1932-1934, 1936-1962, 1970-1971, 1973-1974
|
| Midwest Series | Western League, Mississippi Valley League | 1933
|
| Pan American Association | Mexican League, Texas League | 1959-1961
|
| Dixie Series | Southern League, Texas League | 1967
|
| World Baseball Championship | American Association, International League, Pacific Coast League, Hawaii Islanders (PCL), Latin American All-Stars | 1973
|
| Triple-A World Series | American Association, International League, Pacific Coast League | 1983
|
| Triple-A Classic | American Association, International League | 1988-1991
|
| Triple-A World Series | International League, Pacific Coast League | 1998-2000
|
| Bricktown Showdown | International League, Pacific Coast League | 2006-present
|
