| 2026 (6 Teams) | Memphis | Springfield | Peoria | Palm Beach | | Cardinals | Cardinals | |
| 2025 (6 Teams) | Memphis | Springfield | Peoria | Palm Beach | | Cardinals | Cardinals | |
| 2024 (6 Teams) | Memphis | Springfield | Peoria | Palm Beach | | Cardinals | Cardinals | |
| 2023 (6 Teams) | Memphis | Springfield | Peoria | Palm Beach | | Cardinals | Cardinals | |
| 2022 (6 Teams) | Memphis | Springfield | Peoria | Palm Beach | | Cardinals | Cardinals | |
| 2021 (7 Teams) | Memphis | Springfield | Peoria | Palm Beach | | Cardinals | Cardinals Blue, Cardinals Red | |
| 2019 (9 Teams) | Memphis | Springfield | Palm Beach | Peoria | State College | Cardinals, Johnson City | Cardinals Red, Cardinals Blue | |
| 2018 (9 Teams) | Memphis | Springfield | Palm Beach | Peoria | State College | Cardinals, Johnson City | Cardinals Blue, Cardinals Red | |
| 2017 (8 Teams) | Memphis | Springfield | Palm Beach | Peoria | State College | Johnson City, Cardinals | Cardinals | |
| 2016 (8 Teams) | Memphis | Springfield | Palm Beach | Peoria | State College | Cardinals, Johnson City | Cardinals | |
| 2015 (8 Teams) | Memphis | Springfield | Palm Beach | Peoria | State College | Johnson City, Cardinals | Cardinals | |
| 2014 (8 Teams) | Memphis | Springfield | Palm Beach | Peoria | State College | Johnson City, Cardinals | Cardinals | |
| 2013 (8 Teams) | Memphis | Springfield | Palm Beach | Peoria | State College | Johnson City, Cardinals | Cardinals | |
| 2012 (8 Teams) | Memphis | Springfield | Palm Beach | Quad Cities | Batavia | Johnson City, Cardinals | Cardinals | |
| 2011 (8 Teams) | Memphis | Springfield | Palm Beach | Quad Cities | Batavia | Cardinals, Johnson City | Cardinals | |
| 2010 (9 Teams) | Memphis | Springfield | Palm Beach | Quad Cities | Batavia | Johnson City, Cardinals | Cardinals, Cardinals | |
| 2009 (9 Teams) | Memphis | Springfield | Palm Beach | Quad Cities | Batavia | Cardinals, Johnson City | Cardinals, Cardinals | |
| 2008 (9 Teams) | Memphis | Springfield | Palm Beach | Quad Cities | Batavia | Johnson City, Cardinals | Cardinals, Cardinals | |
| 2007 (9 Teams) | Memphis | Springfield | Palm Beach | Quad Cities | Batavia | Johnson City, Cardinals | Cardinals, Cardinals | |
| 2006 (8 Teams) | Memphis | Springfield | Palm Beach | Quad Cities | State College | Johnson City | Cardinals, Cardinals | |
| 2005 (7 Teams) | Memphis | Springfield | Palm Beach | Quad Cities | New Jersey | Johnson City | Cardinals | |
| 2004 (6 Teams) | Memphis | Tennessee | Palm Beach | Peoria | New Jersey | Johnson City | | |
| 2003 (7 Teams) | Memphis | Tennessee | Palm Beach | Peoria | New Jersey | Johnson City | Cardinals | |
| 2002 (8 Teams) | Memphis | New Haven | Potomac | Peoria | New Jersey | Johnson City | Carora, Cardinals | |
| 2001 (7 Teams) | Memphis | New Haven | Potomac | Peoria | New Jersey | Johnson City | Cardinals | |
| 2000 (7 Teams) | Memphis | Arkansas | Potomac | Peoria | New Jersey | Johnson City | Cardinals | |
| 1999 (7 Teams) | Memphis | Arkansas | Potomac | Peoria | New Jersey | Johnson City | Cardinals | |
| 1998 (7 Teams) | Memphis | Arkansas | Prince William | Peoria | New Jersey | Johnson City | Cardinals | |
| 1997 (7 Teams) | Louisville | Arkansas | Prince William | Peoria | New Jersey | Johnson City | Cardinals | |
| 1996 (7 Teams) | Louisville | Arkansas | St. Petersburg | Peoria | New Jersey | Johnson City | Cardinals | |
| 1995 (8 Teams) | Louisville | Arkansas | St. Petersburg | Peoria, Savannah | New Jersey | Johnson City | Phillies/Cardinals | |
| 1994 (9 Teams) | Louisville | Arkansas | St. Petersburg | Savannah, Madison | New Jersey | Johnson City, Cardinals | Cardinals/Phillies | |
| 1993 (9 Teams) | Louisville | Arkansas | St. Petersburg | Springfield, Savannah | Glens Falls | Johnson City, Cardinals | Tigers/Cardinals | |
| 1992 (9 Teams) | Louisville | Arkansas | St. Petersburg | Springfield, Savannah | Hamilton | Cardinals, Johnson City | Tigers/Cardinals | |
| 1991 (8 Teams) | Louisville | Arkansas | St. Petersburg | Savannah, Springfield | Hamilton | Johnson City, Cardinals | | |
| 1990 (8 Teams) | Louisville | Arkansas | St. Petersburg | Springfield, Savannah | Hamilton | Cardinals, Johnson City | | |
| 1989 (8 Teams) | Louisville | Arkansas | | Springfield, St. Petersburg, Savannah | Hamilton | Johnson City, Cardinals | | |
| 1988 (7 Teams) | Louisville | Arkansas | | Springfield, St. Petersburg, Savannah | Hamilton | Johnson City | | |
| 1987 (7 Teams) | Louisville | Arkansas | | Savannah, St. Petersburg, Springfield | Erie | Johnson City | | |
| 1986 (7 Teams) | Louisville | Arkansas | | Savannah, St. Petersburg, Springfield | Erie | Johnson City | | |
| 1985 (7 Teams) | Louisville | Arkansas | | Springfield, St. Petersburg, Savannah | Erie | Johnson City | | |
| 1984 (7 Teams) | Louisville | Arkansas | | St. Petersburg, Springfield, Savannah | Erie | Johnson City | | |
| 1983 (7 Teams) | Louisville | Arkansas | | Springfield, Macon, St. Petersburg | Erie | Johnson City | | |
| 1982 (7 Teams) | Louisville | Arkansas | | Gastonia, Springfield, St. Petersburg | Erie | Johnson City | | |
| 1981 (6 Teams) | Springfield | Arkansas | | St. Petersburg, Gastonia | Erie | Johnson City | | |
| 1980 (5 Teams) | Springfield | Arkansas | | Gastonia, St. Petersburg | | Johnson City | | |
| 1979 (5 Teams) | Springfield | Arkansas | | Gastonia, St. Petersburg | | Johnson City | | |
| 1978 (6 Teams) | Springfield | Arkansas | | Gastonia, St. Petersburg | | Johnson City, Calgary | | |
| 1977 (7 Teams) | New Orleans | Arkansas | | Gastonia, St. Petersburg | | Johnson City, Calgary | | Cardinals |
| 1976 (5 Teams) | Tulsa | Arkansas | | St. Petersburg | | Johnson City, Cardinals | | |
| 1975 (5 Teams) | Tulsa | Arkansas | | St. Petersburg | | Cardinals, Johnson City | | |
| 1974 (5 Teams) | Tulsa | Arkansas | | Modesto, St. Petersburg | | Cardinals | | |
| 1973 (7 Teams) | Tulsa | Arkansas | | St. Petersburg, Modesto | | Cardinals, Red Birds | | Cardinals |
| 1972 (8 Teams) | Tulsa | Arkansas | | Cedar Rapids, St. Petersburg, Modesto | | Red Birds, Cardinals | | Cardinals |
| 1971 (6 Teams) | Tulsa | Arkansas | | St. Petersburg, Modesto, Cedar Rapids | | Cardinals | | |
| 1970 (8 Teams) | Tulsa | Arkansas | | Modesto, Cedar Rapids, St. Petersburg | Lewiston | Cardinals | | Cardinals |
| 1969 (8 Teams) | Tulsa | Arkansas | | Modesto, St. Petersburg, Cedar Rapids | Lewiston | Cardinals | | Cardinals |
| 1968 (9 Teams) | Tulsa | Arkansas | | Modesto, Cedar Rapids, St. Petersburg | Lewiston | Cardinals | | Cardinals, Cardinals |
| 1967 (8 Teams) | Tulsa | Arkansas | | Cedar Rapids, St. Petersburg, Modesto | Lewiston | Cardinals | | Cardinals |
| 1966 (7 Teams) | Tulsa | Arkansas | | St. Petersburg, Rock Hill, Cedar Rapids | | Cardinals | | Cardinals |
| 1965 (7 Teams) | Jacksonville | Tulsa | | Raleigh, Rock Hill, Cedar Rapids | | Cardinals | | Cardinals |
| 1964 (7 Teams) | Jacksonville | Tulsa | | Winnipeg, Rock Hill, Raleigh | | Cardinals | | Cardinals |
| 1963 (6 Teams) | Atlanta | Tulsa | | Winnipeg, Brunswick, Billings | | | | Cardinals |
| 1962 (7 Teams) | Atlanta | Tulsa | | Portsmouth-Norfolk | | | | Brunswick, Winnipeg, Billings, Cardinals |
| 1961 (9 Teams) | Portland, San Juan/Charleston | Tulsa | | Lancaster | | | | Keokuk, Cardinals, Winnipeg, Johnson City, Billings |
| 1960 (10 Teams) | Rochester | Memphis, Tulsa | | | | | | Daytona Beach, Winston-Salem, Cardinals, Dothan, Keokuk, Billings, Winnipeg |
| 1959 (13 Teams) | Rochester, Omaha | Tulsa | | York | | | | Winnipeg, Winston-Salem, Daytona Beach, Hobbs, Keokuk, Wytheville, Dothan, Cardinals, Billings |
| 1958 (15 Teams) | Rochester, Omaha | Houston | | York | | | | Cardinals, Hobbs, Daytona Beach, Billings, Dothan, Winston-Salem, Wytheville, Keokuk, Albany, Winnipeg, Stockton |
| 1957 (12 Teams) | Omaha, Rochester | Houston | | Columbus | | | | Winnipeg, Ardmore, Albany, Billings, Winston-Salem, Wytheville, Daytona Beach, Decatur |
| 1956 (15 Teams) | Omaha, Rochester | Houston | | Sioux City, Allentown | | | | Fresno, Albany, Ardmore, Dothan, Beaumont, Decatur, Mexicali, Peoria, Gainesville, Winnipeg |
| 1955 (19 Teams) | Omaha, Rochester | Houston | | Allentown, Columbus | | | | Hamilton, Johnson City, Sanford, Paducah, Dothan, Winnipeg, Albany, Peoria, Lynchburg, Fresno, Decatur, Hazlehurst-Baxley, Mexicali, Ardmore |
| 1954 (22 Teams) | Columbus, Rochester | Houston | | Allentown, Columbus, Omaha | | | | Hazlehurst-Baxley, Albany, Johnson City, Dothan, Winnipeg, Fresno, Hamilton, Peoria, Lynchburg, Mexicali, Hannibal, Hot Springs, Ardmore, Daytona Beach, Joplin, Paducah |
| 1953 (18 Teams) | Columbus, Rochester | Houston | | Omaha, Columbus | | | | Lynchburg, Ardmore, Fresno, Paducah, Winston-Salem, Hazlehurst-Baxley, Albany, Hamilton, Johnson City, Dothan, St. Joseph, Hannibal, Sanford |
| 1952 (15 Teams) | Rochester, Columbus | Houston | | Columbus, Omaha | | | | Allentown, Lynchburg, Fresno, Johnson City, Hamilton, Winston-Salem, Hazlehurst-Baxley, Albany, Goldsboro, Paducah |
| 1951 (16 Teams) | Rochester, Columbus | Houston | | Omaha, Columbus | | | | Winston-Salem, St. Joseph, Pocatello, Allentown, Hamilton, Goldsboro, Johnson City, Lynchburg, Tri-City, Fresno, Albany |
| 1950 (21 Teams) | Rochester, Columbus | Houston | | Omaha, Columbus | | | | West Frankfort, Goldsboro, Willows, Montgomery, Johnson City, Albany, Fresno, Lebanon, Duluth, Lynchburg, Winston-Salem, Geneva, Allentown, St. Joseph, Pocatello, Hamilton |
| 1949 (20 Teams) | Columbus, Rochester | Houston | | Omaha, Columbus | | | | Hamilton, Willows, Tallassee, West Frankfort, Albany, Winston-Salem, Allentown, St. Joseph, Salisbury, Lynchburg, Johnson City, Lebanon, Pocatello, Duluth, Fresno |
| 1948 (21 Teams) | Rochester, Columbus | Houston | | Columbus, Omaha | | | | Johnson City, Allentown, Salisbury, West Frankfort, St. Joseph, Hamilton, Carthage, Pocatello, Fresno, Willows, Winston-Salem, Lynchburg, Albany, Duluth, Lawrenceville, Tallassee |
| 1947 (19 Teams) | Rochester, Columbus | Houston | | Omaha, Columbus | | | | West Frankfort, Carthage, Allentown, Duluth, Albany, Hamilton, Pocatello, St. Joseph, Salisbury, Lynchburg, Fresno, Decatur, Winston-Salem, Johnson City |
| 1946 (18 Teams) | Rochester, Columbus | Houston | | Columbus | | | | Johnson City, Albany, Pocatello, Marion, Decatur, Salisbury, Winston-Salem, Fresno, Allentown, St. Joseph, Lynchburg, Duluth, Carthage, Hamilton |
| 1945 (7 Teams) | | Rochester, Columbus | | | | | | Johnson City, Allentown, Marion, Winston-Salem, Lynchburg |
| 1944 (7 Teams) | | Columbus, Sacramento, Rochester | | | | | | Allentown, Johnson City, Lynchburg, Lima |
| 1943 (7 Teams) | | Rochester, Sacramento, Columbus | | | | | | Johnson City, Lynchburg, Jamestown, Allentown |
| 1942 (22 Teams) | | Columbus, Sacramento, Rochester | | | | | | Decatur, Fresno, Hamilton, La Crosse, Springfield, Washington, New Orleans, Albany, Houston, Springfield, Johnson City, Union City, Columbus, Williamson, Duluth, Allentown, Asheville, Pocatello, Mobile |
| 1941 (26 Teams) | | Columbus, Sacramento, Rochester | | | | | | Cooleemee, Duluth, New Orleans, Sioux City, Pocatello, Batesville, Houston, Springfield, Daytona Beach, Springfield, Williamson, Fresno, Union City, Fostoria, Cambridge, Johnson City, Mobile, Decatur, Hamilton, Albany, Columbus, Asheville, Washington |
| 1940 (31 Teams) | | Columbus, Sacramento, Rochester | | | | | | Albany, Columbus, Hamilton, Cooleemee, Union City, Pocatello, Springfield, Kilgore, Allentown, Washington, Daytona Beach, Asheville, Fostoria, Houston, Caruthersville/Batesville, Williamson, Cambridge, Lansing, Mobile, Decatur, Albuquerque, Johnson City, Siloam Springs, Portsmouth, Gastonia, New Orleans, Worthington, Duluth |
| 1939 (28 Teams) | | Rochester, Sacramento, Columbus | | | | | | Johnson City, Albany, Union City, Hamilton, Gastonia, Houston, Decatur, Duluth, Martinsville, Kilgore, Columbus, Williamson, Portsmouth, Pocatello, Albuquerque, Cambridge, Caruthersville, Mobile, Monett, Fostoria, Springfield, Asheville, Washington, Worthington, New Iberia |
| 1938 (27 Teams) | | Columbus, Rochester, Sacramento | | | | | | Albany, Shelby/Gastonia, Jacksonville, New Iberia, Asheville, Springfield, Houston, Paducah, Caruthersville, Johnson City, Duluth, Portsmouth, Cambridge, Fostoria, Monett, Mobile, Daytona Beach, Grand Island, Pine Bluff, Columbus, Midland, Decatur, Amsterdam, Cedar Rapids |
| 1937 (27 Teams) | | Columbus, Sacramento, Rochester | | Cedar Rapids | | | | Fostoria, Decatur, Cambridge, New Iberia, Asheville, Houston, Crookston, Newport, Union City, Springfield, Mobile, Shelby, Portsmouth, Mitchell, Monessen, Jacksonville, Pine Bluff, Daytona Beach, Grand Island, Caruthersville, Columbus, Duluth, Midland |
| 1936 (24 Teams) | | Sacramento, Rochester, Columbus | | Cedar Rapids | | | | Springfield, Jamestown, Ozark, Columbus, New Philadelphia, Newport, Mitchell, Pine Bluff, Daytona Beach, Huntington, Norfolk, Greensburg, Jacksonville, Fostoria, Americus, Union City, Asheville, Houston, New Iberia, Albany |
| 1935 (13 Teams) | | Columbus, Rochester | | Houston | | | | New Iberia, Asheville, Springfield, Beatrice, Greensburg, Bloomington, Hutchinson, Greenwood, Huntington, Jacksonville |
| 1934 (9 Teams) | | Columbus, Rochester | | Elmira, Houston | | | | Springfield, Greensboro, Paris/Lufkin, Huntington, Greensburg |
| 1933 (7 Teams) | | Rochester, Columbus | | Houston, Elmira, Springfield | | | | Greensboro, Springfield |
| 1932 (11 Teams) | | Columbus, Rochester | | Houston, Denver | | | | Elmira, Greensboro, Danville, Springfield, Monroe, Mobile, Keokuk |
| 1931 (3 Teams) | | Rochester | | Houston | | | | Keokuk |
| 1930 (3 Teams) | | Rochester | | Houston | | | | Keokuk |
| 1929 (2 Teams) | | Rochester | | Houston | | | | |
| 1928 (2 Teams) | | Rochester | | Houston | | | | |
| 1927 (2 Teams) | | Syracuse | | Houston | | | | |
| 1926 (1 Teams) | | | | Houston | | | | |
| 1925 (1 Teams) | | | | Houston | | | | |
| 1924 (1 Teams) | | | | Houston | | | | |
| 1923 (1 Teams) | | | | Houston | | | | |
| 1922 (1 Teams) | | | | Houston | | | | |
| 1921 (1 Teams) | | | | Houston | | | | |
| 1920 (1 Teams) | | | | | | | | Houston |
| 1919 (1 Teams) | | | | | | | | Houston |
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