|1942||Butler Yankees, Johnstown Johnnies, Oil City Oilers, Washington Red Birds|
|1941||Beaver Falls Bees, Butler Yankees, Johnstown Johnnies, Oil City Oilers, Warren Buckeyes, Washington Red Birds|
|1940||Beaver Falls Browns, Butler Yankees, Johnstown Johnnies, McKeesport Little Braves/Oil City Oilers, Warren Redskins, Washington Red Birds|
|1939||Beaver Falls Bees, Butler Yankees, Greensburg Senators, Johnstown Johnnies, McKeesport Little Pirates, Washington Red Birds|
|1938||Beaver Falls Browns, Butler Yankees, Greensburg Green Sox, McKeesport Tubers|
|1937||Beaver Falls Bees, Butler Yankees, Greensburg Green Sox, Jeannette Bisons, McKeesport Tubers, Monessen Cardinals|
|1936||Butler Yankees, Charleroi Tigers, Greensburg Red Wings, Jeannette Little Pirates, McKeesport Tubers, Monessen Indians|
|1935||Butler Indians, Charleroi Tigers, Greensburg Red Wings, McKeesport Braves, Monessen Reds, Washington Generals|
|1934||Charleroi Tigers, Greensburg Trojans, Jeannette Reds, McKeesport Tubers, Monessen Indians, Washington Generals|
Historical performance data for professional leagues (affiliated minor leagues, independent minor leagues, fall/winter leagues, and other international leagues) is provided by and licensed from 24-7 Baseball and Chadwick Baseball Bureau. It incorporates the work of many stalwart baseball researchers, including Cliff Blau, Art Cantu, Frank Hamilton, Reed Howard, Kevin Johnson, Bob McConnell, Jack Morris, and Ray Nemec, as well as members of the Minor Leagues Committee of the Society for American Baseball Research.
Perhaps most importantly, it builds upon the seminal work of Ed Washuta, who magnanimously provided the framework to make the whole thing possible.