|1913||C||Berlin Busy Bees, Brantford Red Sox, Guelph Maple Leafs, Hamilton Hams, London Tecumsehs, Ottawa Senators, Peterborough Petes, St. Thomas Saints|
|1912||C||Berlin Busy Bees, Brantford Red Sox, Guelph Maple Leafs, Hamilton Kolts, London Tecumsehs, Ottawa Senators, Peterborough Whitecaps, St. Thomas Saints|
|1911||D||Berlin Green Sox, Brantford Red Sox, Guelph Maple Leafs, Hamilton Kolts, London Cockneys, St. Thomas Saints|
|1905||D||Brantford Indians, Ingersoll, Simcoe, St. Thomas Saints, Woodstock Maroons|
|1899||D||Chatham Reds, Guelph Maple Leafs, Hamilton Blackbirds, London Cockneys, St. Thomas Saints, Stratford Poets, Woodstock Bains|
|1898||N/A||Chatham Reds, Hamilton Hams, London Cockneys, St. Thomas Saints|
|1897||N/A||Guelph Maple Leafs, Hamilton Blackbirds, London Cockneys, Toronto Canucks|
|1896||N/A||Galt, Guelph, Hamilton, London|
|1885||N/A||Guelph Maple Leafs, Hamilton Clippers, Hamilton Primrose, London Cockneys, Toronto|
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.