| Cuban Winter League | | |
| Independent Negro | | Atlantic City Bacharach Giants, Baltimore Black Sox, Brooklyn Royal Giants, Buffalo Stars, Cuban Stars East, Harrisburg Giants, New Orleans Crescent Stars, New York Bacharach Giants, New York Lincoln Giants, Philadelphia Giants, Philadelphia Hilldale Giants, Richmond Giants |
| California Winter League | | |
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| American Association | AA | Columbus Senators, Indianapolis Indians, Kansas City Blues, Louisville Colonels, Milwaukee Brewers, Minneapolis Millers, St. Paul Saints, Toledo Mud Hens |
| International League | AA | Baltimore Orioles, Buffalo Bisons, Jersey City Skeeters, Newark Bears, Reading Aces, Rochester Tribe, Syracuse Stars, Toronto Maple Leafs |
| Pacific Coast League | AA | Los Angeles Angels, Oakland Oaks, Portland Beavers, Sacramento Senators, Salt Lake City Bees, San Francisco Seals, Seattle Indians, Vernon Tigers |
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| Eastern League | A | Albany Senators, Bridgeport Americans, Fitchburg/Worcester Boosters, Hartford Senators, New Haven Indians, Pittsfield Hillies, Springfield Ponies, Waterbury Brasscos |
| Southern Association | A | Atlanta Crackers, Birmingham Barons, Chattanooga Lookouts, Little Rock Travelers, Memphis Chickasaws, Mobile Bears, Nashville Volunteers, New Orleans Pelicans |
| Texas League | A | Beaumont Exporters, Dallas Steers, Fort Worth Panthers, Galveston Sand Crabs, Houston Buffaloes, San Antonio Bears, Shreveport Gassers, Wichita Falls Spudders |
| Western League | A | Denver Bears, Des Moines Boosters, Oklahoma City Indians, Omaha Buffaloes, Sioux City Packers, St. Joseph Saints, Tulsa Oilers, Wichita Witches |
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| Central League | B | Grand Rapids Billbobs, Ionia Mayors, Kalamazoo Celery Pickers, Lansing Senators, Ludington Mariners, Muskegon Daniels/Muskies |
| Eastern Canada League | B | Montreal Royals, Ottawa Senators, Trois-Rivieres Trios, Valleyfield/Cap de la Madeleine Madcaps |
| Illinois-Indiana-Iowa League | B | Bloomington Bloomers, Danville Veterans, Decatur Commodores, Evansville Evas, Moline Plowboys, Peoria Tractors, Rockford Rox, Terre Haute Tots |
| Michigan-Ontario League | B | Bay City Wolves, Brantford Brants, Flint Vehicles, Hamilton Tigers, Kitchener Terriers, London Tecumsehs, Port Huron-Sarnia Saints, Saginaw Aces |
| Pacific Coast International League | B | |
| South Atlantic League | B | Augusta Tygers, Charleston Pals, Charlotte Hornets, Columbia Comers, Greenville Spinners, Spartanburg Spartans |
| Virginia League | B | Newport News Shipbuilders, Norfolk Tars, Portsmouth Truckers, Richmond Colts, Rocky Mount Tar Heels, Wilson Bugs |
| Western International League | B | Calgary Bronchos, Edmonton Eskimos, Tacoma Tigers, Vancouver Beavers |
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| Florida State League | C | Daytona Beach Islanders, Jacksonville Indians, Lakeland Highlanders, Orlando Bulldogs, St. Petersburg Saints, Tampa Smokers |
| Piedmont League | C | Danville Tobacconists, Durham Bulls, Greensboro Patriots, High Point Furniture Makers, Raleigh Capitals, Winston-Salem Twins |
| Southwestern League | C | Bartlesville Grays, Coffeyville Refiners, Hutchinson Wheat Shockers, Independence Producers, Muskogee Mets, Salina Millers, Sapulpa Sappers, Topeka Kaws |
| Western Association | C | Enid Harvesters, Fort Smith Twins, Henryetta Hens, Joplin Miners, McAlester Miners, Okmulgee Drillers, Pawhuska Osages, Springfield Midgets |
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| Appalachian League | D | Bristol State Liners, Cleveland Manufacturers, Greeneville Burley Cubs, Johnson City Soldiers, Kingsport Indians, Knoxville Pioneers |
| Blue Grass League | D | Cynthiana Merchants, Lexington Reds, Maysville Cardinals, Mount Sterling Essex, Paris Bourbons, Winchester Dodgers |
| Blue Ridge League | D | Chambersburg Maroons, Frederick Hustlers, Hagerstown Terriers, Hanover Raiders, Martinsburg Blue Sox, Waynesboro Villagers |
| Cotton States League | D | Clarksdale Cubs, Greenville Bucks, Greenwood Indians, Jackson Red Sox, Meridian Mets, Vicksburg Hill Billies |
| Dakota League | D | Aberdeen Grays, Fargo Athletics, Jamestown Jimkotans, Mitchell Kernels, Sioux Falls Soos, Valley City/Bismarck Hi-Liners, Wahpeton-Breckenridge Twins, Watertown Cubs |
| Eastern Shore League | D | Cambridge Canners, Crisfield Crabbers, Laurel Blue Hens, Parksley Spuds, Pocomoke City Salamanders, Salisbury Indians |
| Kentucky-Illinois-Tennessee League | D | Cairo Egyptians, Fulton Railroaders, Hopkinsville Hoppers, Madisonville Miners, Mayfield Pantsmakers, Paducah Indians, Paris Travelers, Trenton Reds |
| Mississippi Valley League | D | Cedar Rapids Bunnies, Dubuque Climbers, Marshalltown Ansons, Ottumwa Cardinals, Rock Island Islanders, Waterloo Hawks |
| Nebraska State League | D | Beatrice Blues, Fairbury Jeffersons, Grand Island Champions, Hastings Cubs, Lincoln Links, Norfolk Elk Horns |
| Oklahoma State League | D | Chickasha Chicks, Clinton Bulldogs, Duncan Oilers, El Reno Railroaders, Guthrie, Wilson Drillers |
| Texas-Oklahoma League | D | Ardmore Producers, Bonham Bingers, Cleburne Generals/Scouts, Corsicana Gumbo Busters, Greenville Togs, Mexia Gushers, Paris Snappers, Sherman Red Sox |
| West Texas League | D | Abilene Eagles, Amarillo Gassers, Clovis Buzzers, Lubbock Hubbers, Ranger Nitros, San Angelo Colts, Stamford Colonels, Sweetwater Swatters |
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| Cuban League | Foreign | |
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| Quebec Provincial League | Independent | |
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| Negro Southern League | Negro | |
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| Negro National League | Negro Majors | Chicago American Giants, Cleveland Tate Stars, Cuban Stars West, Detroit Stars, Indianapolis ABCs, Kansas City Monarchs, Pittsburgh Keystones, St. Louis Stars |