| 1951 |
Butler Tigers, Erie Sailors, Lockport Locks, New Castle Indians, Niagara Falls Citizens, Youngstown/Oil City A's |
| 1950 |
Butler Tigers, Erie Sailors, Johnstown Johnnies, New Castle Chiefs, Niagara Falls Citizens, Oil City Refiners, Vandergrift Pioneers, Youngstown A's |
| 1949 |
Butler Tigers, Erie Sailors, Johnstown Johnnies, New Castle Nats, Oil City Refiners, Uniontown Coal Barons, Vandergrift Pioneers, Youngstown A's |
| 1948 |
Butler Yankees, Erie Sailors, Johnstown Johnnies, New Castle Chiefs, Oil City Refiners, Uniontown Coal Barons, Vandergrift Pioneers, Youngstown Colts |
| 1947 |
Butler Yankees, Erie Sailors, Johnstown Johnnies, Niagara Falls Frontiers, Oil City Refiners, Uniontown Coal Barons, Vandergrift Pioneers, Youngstown Colts |
| 1946 |
Butler Yankees, Erie Sailors, Johnstown Johnnies, Niagara Falls Frontiers, Oil City Oilers, Youngstown Gremlins |
| 1942 |
Canton Terriers, Charleston Senators, Dayton Ducks, Erie Sailors, Springfield Cardinals, Zanesville Cubs |
| 1941 |
Akron Yankees, Canton Terriers, Charleston Senators, Dayton Ducks, Erie Sailors, Springfield Cardinals, Youngstown Browns, Zanesville Cubs |
| 1940 |
Akron Yankees, Canton Terriers, Charleston Senators, Dayton Wings, Portsmouth Red Birds, Youngstown Browns |
| 1939 |
Akron Yankees, Canton Terriers, Charleston Senators, Dayton Wings, Erie Sailors, Portsmouth Red Birds, Springfield Indians, Youngstown Browns |
| 1938 |
Akron Yankees, Canton Terriers, Charleston Senators, Dayton Ducks, Erie Sailors, Johnstown Johnnies, Portsmouth Red Birds, Springfield Indians |
| 1937 |
Akron Yankees, Canton Terriers, Charleston Senators, Dayton Ducks, Johnstown Johnnies, Portsmouth Red Birds, Springfield Indians, Zanesville Greys |
| 1936 |
Akron Yankees, Canton Terriers, Charleston Senators, Dayton Ducks, Huntington Red Birds, Johnstown Johnnies, Portsmouth Pirates, Zanesville Greys |
| 1935 |
Akron Yankees, Beckley Miners, Charleston Senators, Dayton Ducks, Huntington Red Birds, Johnstown Johnnies, Portsmouth Pirates, Zanesville Greys |
| 1934 |
Beckley Black Knights, Charleston Senators, Dayton Ducks, Huntington Red Birds, Johnstown Johnnies, Springfield Pirates, Wheeling Stogies, Zanesville Greys |
| 1933 |
Beckley Black Knights, Charleston Senators, Dayton Ducks, Huntington Boosters, Johnstown Johnnies, Springfield Chicks, Wheeling Stogies, Zanesville Greys |
| 1932 |
Beckley Black Knights, Charleston Senators, Clarksburg Generals, Cumberland Colts, Huntington Boosters, Johnstown Johnnies |
| 1931 |
Beckley Black Knights, Charleroi Governors, Charleston Senators, Clarksburg Generals, Cumberland Colts, Fairmont Black Diamonds, Hagerstown Hubs/Parkersburg Parkers/Youngstown Tubers, Huntington Boosters,
Jeannette Jays/Altoona Engineers/Beaver Falls Beavers, Johnstown Johnnies, Scottdale Cardinals, Wheeling Stogies |
| 1930 |
Charleroi Governors, Clarksburg Generals, Cumberland Colts, Fairmont Black Diamonds, Jeannette Jays, Johnstown Johnnies, Scottdale Scotties, Wheeling Stogies |
| 1929 |
Charleroi Governors, Clarksburg Generals, Cumberland Colts, Fairmont Black Diamonds, Jeannette Jays, Johnstown Johnnies, Scottdale Scotties, Wheeling Stogies |
| 1928 |
Charleroi Babes, Clarksburg Generals, Cumberland Colts, Fairmont Black Diamonds, Jeannette Jays, Johnstown Johnnies, Scottdale Scotties, Wheeling Stogies |
| 1927 |
Charleroi Babes, Clarksburg Generals, Cumberland Colts, Fairmont Black Diamonds, Jeannette Jays, Johnstown Johnnies, Scottdale Scotties, Wheeling Stogies |
| 1926 |
Clarksburg Generals, Cumberland Colts, Fairmont Black Diamonds, Jeannette Jays, Johnstown Johnnies, Scottdale Scotties, Uniontown Cokers, Wheeling Stogies |
| 1925 |
Clarksburg Cyrians/Ghosts, Cumberland Colts, Fairmont Maroons, Johnstown Johnnies, Scottdale Scotties, Wheeling Stogies |
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