Michigan-Ontario League was the name of an American professional baseball league. It operated seven full seasons and part of an eighth from 1919 to 1926.
In 1926, the Michigan-Ontario League merged with the Central League to form the Michigan State League , which played only the one season.
Americas
Major
Minor
Triple-A:
Double-A:
Class A Advanced:
Class A:
Class A Short-Season:
Rookie Advanced:
Rookie:
Independent
Off-season
MLB Affiliated:
Independent:
Defunct Major Leagues
Asia
China
Japan
Major:
Minor:
Off-season:
Independent:
Women's:
South Korea
Taiwan
Inter-league and Professional National Team Championships
