 A formal playoff system to determine league champions was established in 1934.The Binghamton Triplets won 10 championships, the most among all teams in the league, followed by the Elmira Colonels/Pioneers/Royals (8) and the Scranton Miners/Red Sox (7).Among active franchises, the Harrisburg Senators have won 6 championships, the most in the league, followed by the Akron Aeros/RubberDucks (5) and the Reading Fightin Phils and Trenton Thunder (4).