| Cuban Winter League |
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| Independent Negro |
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Nashville Elite Giants, Pittsburgh Crawfords, Schenectady Mohawk Giants, Shreveport Black Sports |
| Wisconsin State League |
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| 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, Montreal Royals, Newark Bears, Reading Keystones, Rochester Red Wings, Toronto Maple Leafs |
| Pacific Coast League |
AA |
Hollywood Stars, Los Angeles Angels, Mission Reds, Oakland Oaks, Portland Beavers, Sacramento Senators, San Francisco Seals, Seattle Indians |
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| Eastern League |
A |
Albany Senators, Allentown Dukes, Bridgeport Bears, Hartford Senators, New Haven Profs, Pittsfield Hillies, Providence Grays, Springfield Ponies |
| 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, Houston Buffaloes, San Antonio Indians, Shreveport Sports, Waco Cubs, Wichita Falls Spudders |
| Western League |
A |
Denver Bears, Des Moines Demons, Oklahoma City Indians, Omaha Crickets, Pueblo Steelworkers, Topeka Jayhawks, Tulsa Oilers, Wichita Aviators |
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| Central League |
B |
Akron Tyrites, Canton Terriers, Dayton Aviators, Erie Sailors, Fort Wayne Chiefs, Springfield Dunnmen |
| Illinois-Indiana-Iowa League |
B |
Bloomington Bloomers, Danville Veterans, Decatur Commodores, Evansville Hubs, Peoria Tractors, Quincy Indians, Springfield Senators, Terre Haute Tots |
| New England League |
B |
Brockton Shoemakers, Haverhill Hillies/Fitchburg Wanderers/Gloucester Hillies, Lewiston Twins, Lowell Millers/Nashua Millionaires, Lynn Papooses, Manchester Blue Sox, New Bedford Millmen, Portland Mariners |
| New York-Pennsylvania League |
B |
Binghamton Triplets, Elmira Colonels, Harrisburg Senators, Scranton Miners, Syracuse Stars/Hazleton Mountaineers, Wilkes-Barre Barons, Williamsport Grays, York White Roses |
| South Atlantic League |
B |
Asheville Tourists, Augusta Tygers, Charlotte Hornets, Columbia Comers, Greenville Spinners, Knoxville Smokies, Macon Peaches, Spartanburg Spartans |
| Southeastern League |
B |
Columbus Foxes, Jacksonville Tars, Montgomery Lions, Pensacola Flyers, Selma Cloverleafs, Tampa Smokers |
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| Middle Atlantic League |
C |
Charleroi Governors, Clarksburg Generals, Cumberland Colts, Fairmont Black Diamonds, Jeannette Jays, Johnstown Johnnies, Scottdale Scotties, Wheeling Stogies |
| Piedmont League |
C |
Durham Bulls, Greensboro Patriots, Henderson Bunnies, High Point Pointers, Salisbury-Spencer Colonials, Winston-Salem Twins |
| Western Association |
C |
Fort Smith Twins, Independence Producers, Joplin Miners, Muskogee/Maud Chiefs, Shawnee Robins, Springfield Midgets |
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| Arizona State League |
D |
Bisbee Bees, Globe Bears, Mesa Jewels, Miami Miners, Phoenix Senators, Tucson Cowboys |
| Blue Ridge League |
D |
Chambersburg Young Yanks, Frederick Warriors, Hagerstown Hubs, Hanover Raiders, Martinsburg Blue Sox, Waynesboro Red Birds |
| California State League |
D |
Bakersfield Bees, San Bernardino Padres, San Diego Aces, Santa Ana/Pomona/Coronado Orange Countians/Arabs |
| Cotton States League |
D |
Alexandria Reds, El Dorado Lions, Hattiesburg Pinetoppers/Baton Rouge Essos, Jackson Senators, Laurel Cardinals, Meridian Mets/Lake Charles Newporters, Monroe Drillers, Vicksburg Hill Billies |
| Eastern Carolina League |
D |
Fayetteville Highlanders, Goldsboro Goldbugs, Greenville Tobacconists, Kinston Eagles, Rocky Mount Buccaneers, Wilmington Pirates |
| Georgia-Alabama League |
D |
Anniston Nobles, Carrollton Champs, Cedartown Sea Cows, Gadsden Eagles, Lindale Collegians, Talladega Indians |
| Lone Star League |
D |
Palestine Pals, Sherman Snappers, Texarkana Twins, Tyler Trojans |
| Mississippi Valley League |
D |
Burlington Bees, Cedar Rapids Bunnies, Davenport Blue Sox, Dubuque Tigers, Keokuk Indians, Moline Plowboys, Rock Island Islanders, Waterloo Hawks |
| Nebraska State League |
D |
Fairbury Jeffersons, Grand Island Islanders, Lincoln Links, McCook Generals, Norfolk Elks, North Platte Buffaloes, Norton Jayhawks, York Dukes |
| West Texas League |
D |
Abilene Aces, Ballinger Bearcats, Big Spring Cowboys, Coleman Bobcats, Midland Colts, San Angelo Sheep Herders |
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| Cuban League |
Foreign |
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| Mexican League |
Independent |
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| Negro Southern League |
Negro |
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| Texas Negro League |
Negro |
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| American Negro League |
Negro Majors |
Atlantic City Bacharach Giants, Baltimore Black Sox, Cuban Stars East, Homestead Grays, New York Lincoln Giants, Philadelphia Hilldale Giants |
| Negro National League |
Negro Majors |
Birmingham Black Barons, Chicago American Giants, Cuban Stars West, Detroit Stars, Kansas City Monarchs, Memphis Red Sox, St. Louis Stars |