| 1958 |
Albuquerque Dukes, Amarillo Gold Sox, Colorado Springs Sky Sox, Des Moines Bruins, Lincoln Chiefs, Pueblo Bruins, Sioux City Soos, Topeka Hawks |
| 1957 |
Albuquerque Dukes, Amarillo Gold Sox, Colorado Springs Sky Sox, Des Moines Bruins, Lincoln Chiefs, Pueblo Dodgers, Sioux City Soos, Topeka Hawks |
| 1956 |
Albuquerque Dukes, Amarillo Gold Sox, Colorado Springs Sky Sox, Des Moines Bruins, Lincoln Chiefs, Pueblo Dodgers, Sioux City Soos, Topeka Hawks |
| 1955 |
Colorado Springs Sky Sox, Des Moines Bruins, Lincoln Chiefs, Pueblo Dodgers, Sioux City Soos, Wichita Indians |
| 1954 |
Colorado Springs Sky Sox, Denver Bears, Des Moines Bruins, Lincoln Chiefs, Omaha Cardinals, Pueblo Dodgers, Sioux City Soos, Wichita Indians |
| 1953 |
Colorado Springs Sky Sox, Denver Bears, Des Moines Bruins, Lincoln Chiefs, Omaha Cardinals, Pueblo Dodgers, Sioux City Soos, Wichita Indians |
| 1952 |
Colorado Springs Sky Sox, Denver Bears, Des Moines Bruins, Lincoln A's, Omaha Cardinals, Pueblo Dodgers, Sioux City Soos, Wichita Indians |
| 1951 |
Colorado Springs Sky Sox, Denver Bears, Des Moines Bruins, Lincoln A's, Omaha Cardinals, Pueblo Dodgers, Sioux City Soos, Wichita Indians |
| 1950 |
Colorado Springs Sky Sox, Denver Bears, Des Moines Bruins, Lincoln A's, Omaha Cardinals, Pueblo Dodgers, Sioux City Soos, Wichita Indians |
| 1949 |
Denver Bears, Des Moines Bruins, Lincoln A's, Omaha Cardinals, Pueblo Dodgers, Sioux City Soos |
| 1948 |
Denver Bears, Des Moines Bruins, Lincoln A's, Omaha Cardinals, Pueblo Dodgers, Sioux City Soos |
| 1947 |
Denver Bears, Des Moines Bruins, Lincoln A's, Omaha Cardinals, Pueblo Dodgers, Sioux City Soos |
| 1938 |
|
| 1937 |
Cedar Rapids Raiders, Davenport Blue Sox, Des Moines Demons, Rock Island Islanders, Sioux City Cowboys, Waterloo Reds |
| 1936 |
Cedar Rapids Raiders, Davenport Blue Sox, Des Moines Demons, Omaha Robin Hoods/Rock Island Islanders, Sioux City Cowboys, Waterloo Hawks |
| 1935 |
Cedar Rapids Raiders, Davenport Blue Sox, Des Moines Demons, Keokuk Indians, Omaha Pakers/Council Bluffs Rails, Rock Island Islanders, Sioux City Cowboys, St. Joseph Saints |
| 1934 |
Cedar Rapids Raiders, Davenport Blue Sox, Des Moines Demons, Omaha Packers, Rock Island Islanders, Sioux City Cowboys, St. Joseph Saints, Topeka Senators |
| 1933 |
Des Moines Demons, Hutchinson Wheatshockers/Bartlesville Broncos, Joplin Miners, Omaha Packers, Springfield Cardinals, St. Joseph Saints, Topeka Senators, Wichita/Muskogee Oilers |
| 1932 |
Denver Bears, Des Moines Demons, Oklahoma City Indians, Omaha Packers, Pueblo Braves, St. Joseph Saints, Tulsa Oilers, Wichita Aviators |
| 1931 |
Denver Bears, Des Moines Demons, Oklahoma City Indians, Omaha Packers, Pueblo Braves, St. Joseph Saints, Topeka Senators, Wichita Aviators |
| 1930 |
Denver Bears, Des Moines Demons, Oklahoma City Indians, Omaha Packers, Pueblo Braves, St. Joseph Saints, Topeka Senators, Wichita Aviators |
| 1929 |
Denver Bears, Des Moines Demons, Oklahoma City Indians, Omaha Crickets, Pueblo Steelworkers, Topeka Jayhawks, Tulsa Oilers, Wichita Aviators |
| 1928 |
Amarillo Texans, Denver Bears, Des Moines Demons, Oklahoma City Indians, Omaha Crickets, Pueblo Steelworkers, Tulsa Oilers, Wichita Larks |
| 1927 |
Amarillo Texans, Denver Bears, Des Moines Demons, Lincoln Links, Oklahoma City Indians, Omaha Buffaloes, Tulsa Oilers, Wichita Larks |
| 1926 |
Denver Bears, Des Moines Demons, Lincoln Links, Oklahoma City Indians, Omaha Buffaloes, St. Joseph Saints, Tulsa Oilers, Wichita Izzies |
| 1925 |
Denver Bears, Des Moines Demons, Lincoln Links, Oklahoma City Indians, Omaha Buffaloes, St. Joseph Saints, Tulsa Oilers, Wichita Izzies |
| 1924 |
Denver Bears, Des Moines Boosters, Lincoln Links, Oklahoma City Indians, Omaha Buffaloes, St. Joseph Saints, Tulsa Oilers, Wichita Izzies |
| 1923 |
Denver Bears, Des Moines Boosters, Oklahoma City Indians, Omaha Buffaloes, Sioux City Packers, St. Joseph Saints, Tulsa Oilers, Wichita Izzies |
| 1922 |
Denver Bears, Des Moines Boosters, Oklahoma City Indians, Omaha Buffaloes, Sioux City Packers, St. Joseph Saints, Tulsa Oilers, Wichita Witches |
| 1921 |
Des Moines Boosters, Joplin Miners, Oklahoma City Indians, Omaha Buffaloes, Sioux City Packers, St. Joseph Saints, Tulsa Oilers, Wichita Witches |
| 1920 |
Des Moines Boosters, Joplin Miners, Oklahoma City Indians, Omaha Rourkes, Sioux City Packers, St. Joseph Saints, Tulsa Oilers, Wichita Jobbers |
| 1919 |
Des Moines Boosters, Joplin Miners, Oklahoma City Indians, Omaha Rourkes, Sioux City Indians, St. Joseph Saints, Tulsa Oilers, Wichita Jobbers |
| 1918 |
Des Moines Boosters, Hutchinson Salt Packers/Oklahoma City Indians, Joplin Miners, Omaha Rourkes, Sioux City Indians, St. Joseph Saints, Topeka Kaw-nees/Hutchinson Salt Packers, Wichita Jobbers |
| 1917 |
Denver Bears, Des Moines Boosters, Joplin Miners, Lincoln Links, Omaha Rourkes, Sioux City Indians/St. Joseph Drummers, St. Joseph Drummers/Hutchinson Wheatshockers, Wichita Witches |
| 1916 |
Denver Bears, Des Moines Boosters, Lincoln Tigers, Omaha Rourkes, Sioux City Indians, St. Joseph Drummers, Topeka Savages, Wichita Witches/Colorado Springs Millionaires |
| 1915 |
Denver Bears, Des Moines Boosters, Lincoln Tigers, Omaha Rourkes, Sioux City Indians, St. Joseph Drummers, Topeka Jayhawks, Wichita Witches |
| 1914 |
Denver Bears, Des Moines Boosters, Lincoln Tigers, Omaha Rourkes, Sioux City Indians, St. Joseph Drummers, Topeka Jayhawks, Wichita Witches |
| 1913 |
Denver Bears, Des Moines Boosters, Lincoln Railsplitters, Omaha Rourkes, Sioux City Packers, St. Joseph Drummers, Topeka Jayhawks, Wichita Witches |
| 1912 |
Denver Grizzlies, Des Moines Boosters, Lincoln Railsplitters, Omaha Rourkes, Sioux City Packers, St. Joseph Drummers, Topeka Jayhawks, Wichita Witches |
| 1911 |
Denver Grizzlies, Des Moines Boosters, Lincoln Railsplitters, Omaha Rourkes, Sioux City Packers, St. Joseph Drummers, Topeka Jayhawks, Wichita Jobbers/Pueblo Indians |
| 1910 |
Denver Grizzlies, Des Moines Boosters, Lincoln Railsplitters, Omaha Rourkes, Sioux City Packers, St. Joseph Drummers, Topeka Jayhawks, Wichita Jobbers |
| 1909 |
Denver Grizzlies, Des Moines Boosters, Lincoln Railsplitters, Omaha Rourkes, Pueblo Indians, Sioux City Packers, Topeka Jayhawks, Wichita Jobbers |
| 1908 |
Denver Grizzlies, Des Moines Boosters, Lincoln Railsplitters, Omaha Rourkes, Pueblo Indians, Sioux City Packers |
| 1907 |
Denver Grizzlies, Des Moines Champs, Lincoln Treeplanters, Omaha Rourkes, Pueblo Indians, Sioux City Packers |
| 1906 |
Denver Grizzlies, Des Moines Champs, Lincoln Ducklings, Omaha Rourkes, Pueblo Indians, Sioux City Packers |
| 1905 |
Colorado Springs Millionaires/Pueblo Indians, Denver Grizzlies, Des Moines Underwriters, Omaha Rourkes, Sioux City Packers, St. Joseph Saints |
| 1904 |
Colorado Springs Millionaires, Denver Grizzlies, Des Moines Prohibitionists, Omaha Rangers, Sioux City Soos, St. Joseph Saints |
| 1903 |
Colorado Springs Millionaires, Denver Grizzlies, Des Moines Undertakers, Kansas City Blue Stockings, Milwaukee Creams, Omaha Indians, Peoria Distillers, St. Joseph Saints |
| 1902 |
Colorado Springs Millionaires, Denver Grizzlies, Des Moines Midgets, Kansas City Blue Stockings, Milwaukee Creams, Omaha Indians, Peoria Distillers, St. Joseph Saints |
| 1901 |
Colorado Springs Millionaires, Denver Grizzlies, Des Moines Hawkeyes, Grand Rapids, Kansas City Blues, Minneapolis Millers, Omaha Omahogs, St. Joseph Saints,
St. Paul Saints |
| 1899 |
Buffalo Bisons, Columbus Buckeyes/Senators/Grand Rapids Furnituremakers, Detroit Tigers, Indianapolis Hoosiers, Kansas City Blues, Milwaukee Brewers/Creams, Minneapolis Millers, St. Paul Apostles/Saints |
| 1898 |
Columbus Buckeyes/Senators, Detroit Tigers, Indianapolis Hoosiers, Kansas City Blues, Milwaukee Brewers/Creams, Minneapolis Millers, Omaha Omahogs/St. Joseph Saints, St. Paul Apostles/Saints |
| 1897 |
Columbus Senators, Detroit Tigers, Grand Rapids Bob-o-links, Indianapolis Indians, Kansas City Blues, Milwaukee Brewers, Minneapolis Millers, St. Paul Saints |
| 1896 |
Columbus Buckeyes/Senators, Detroit Tigers, Grand Rapids Rippers/Gold Bugs, Indianapolis Hoosiers, Kansas City Blues, Milwaukee Brewers/Creams, Minneapolis Millers, St. Paul Apostles/Saints |
| 1895 |
Detroit Tigers, Grand Rapids Gold Bugs, Indianapolis Hoosiers/Indians, Kansas City Blues, Milwaukee Brewers, Minneapolis Millers, St. Paul Apostles, Toledo Swamp Angels/Terre Haute Hottentots |
| 1892 |
Columbus Reds, Indianapolis Hoosiers, Kansas City Cowboys, Milwaukee Brewers, Minneapolis Minnies, Omaha Omahogs, St. Paul Saints/Fort Wayne, Toledo Black Pirates |