| Cuban Winter League | | |
| California Winter League | | |
| | |
| American Association | A | Columbus Senators, Indianapolis Indians, Kansas City Blues, Louisville Colonels, Milwaukee Brewers, Minneapolis Millers, St. Paul Saints, Toledo Mud Hens |
| Eastern League | A | Baltimore Orioles, Buffalo Bisons, Jersey City Skeeters, Montreal Royals, Newark Indians, Providence Grays, Rochester Bronchos, Toronto Maple Leafs |
| Pacific Coast League | A | Los Angeles Angels, Oakland Oaks, Portland Beavers, San Francisco Seals |
| Southern Association | A | Atlanta Crackers, Birmingham Barons, Little Rock Travelers, Memphis Egyptians, Mobile Sea Gulls, Montgomery Senators, Nashville Volunteers, New Orleans Pelicans |
| Western League | A | Denver Grizzlies, Des Moines Boosters, Lincoln Railsplitters, Omaha Rourkes, Pueblo Indians, Sioux City Packers |
| | |
| Central League | B | Dayton Veterans, Evansville River Rats, Fort Wayne Billikens, Grand Rapids Wolverines, South Bend Greens, Terre Haute Hottentots, Wheeling Stogies, Zanesville Infants |
| Connecticut State League | B | Bridgeport Orators, Hartford Senators, Holyoke Papermakers, Meriden Silverites, New Britain Perfectos, New Haven Blues, Springfield Ponies, Waterbury Authors |
| Illinois-Indiana-Iowa League | B | Bloomington Bloomers, Cedar Rapids Rabbits, Clinton Infants, Decatur Commodores, Dubuque Dubs, Peoria Distillers, Rock Island Islanders, Springfield Senators |
| New England League | B | Brockton Tigers, Fall River Indians, Haverhill Hustlers, Lawrence Colts, Lowell Tigers, Lynn Shoemakers, New Bedford Whalers, Worcester Busters |
| New York State League | B | Albany Senators, Binghamton Bingoes, Gloversville-Johnstown Jags/Elmira Colonels, Scranton Miners, Syracuse Stars, Troy Trojans, Utica Pent-Ups, Wilkes-Barre Barons |
| Northwestern League | B | Aberdeen/Grays Harbor Grays, Butte Miners, Seattle Siwashes, Spokane Indians, Tacoma Tigers, Vancouver Beavers |
| Tri-State League | B | Altoona Mountaineers, Harrisburg Senators, Johnstown Johnnies, Lancaster Red Roses, Reading Pretzels, Trenton Tigers, Williamsport Millionaires, Wilmington Peaches |
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| Ohio-Pennsylvania League | C | Akron Champs, Canton Watchmakers, East Liverpool Potters, Girard/Butler/Erie Sailors, McKeesport Tubers, New Castle Nocks, Sharon Giants, Youngstown Champs |
| South Atlantic League | C | Augusta Tourists, Charleston Sea Gulls, Columbia Gamecocks, Jacksonville Jays, Macon Peaches, Savannah Indians |
| Texas League | C | Austin Senators, Dallas Giants, Fort Worth Panthers, Galveston Sand Crabs, Houston Buffaloes, San Antonio Bronchos, Shreveport Pirates, Waco Navigators |
| Virginia League | C | Danville Red Sox, Lynchburg Shoemakers, Norfolk Tars, Portsmouth Truckers, Richmond Colts, Roanoke Tigers |
| Western Association | C | Enid Railroaders, Hutchinson Salt Packers, Joplin Miners, Oklahoma City Mets, Springfield Midgets, Topeka White Sox, Webb City Webfeet, Wichita Jobbers |
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| Arkansas State League | D | Argenta Shamrocks, Helena Hellions, Hot Springs Vaporites, Newport Pearl Diggers, Pine Bluff Pine Knotts, Poplar Bluff/Brinkley |
| Atlantic Association | D | Lewiston, Newport Ponies, Pawtucket Colts, Portland Blue Sox, Taunton/Attleboro Angels, Woonsocket Trotters |
| Blue Grass League | D | Frankfort Statesmen, Lawrenceburg, Lexington Colts, Richmond Pioneers, Shelbyville Grays, Winchester Hustlers |
| Carolina Association | D | Anderson Electricians, Charlotte Hornets, Greensboro Champs, Greenville Spinners, Spartanburg Spartans, Winston-Salem Twins |
| Central Association | D | Burlington Pathfinders, Jacksonville Lunatics, Keokuk Indians, Kewanee Boilermakers, Oskaloosa Quakers, Ottumwa Packers, Quincy Gems, Waterloo Lulus |
| Central Kansas League | D | Ellsworth Worthies, Little River, McPherson Merry Macks, Minneapolis Minnies, Newton Browns, Salina Trade Winners |
| Cotton States League | D | Columbus Discoverers, Gulfport-Biloxi Sand Crabs, Jackson Senators, Meridian Ribboners, Monroe Municipals, Vicksburg Hill Climbers |
| Eastern Carolina League | D | Goldsboro Giants, Kinston, New Bern, Raleigh Red Birds, Wilmington Sailors, Wilson Tobacconists |
| Eastern Illinois League | D | Charleston Evangelists, Danville/Staunton Speakers, Mattoon Giants, Pana/Linton Coal Miners, Paris Parisians, Shelbyville Queen Citys, Taylorville Tailors, Vincennes Alices |
| Gulf Coast League | D | Alexandria White Sox, Beaumont Cubs, Crowley Rice Birds, Lake Charles Creoles, Morgan City Oyster Shuckers, Orange Hoo-Hoos |
| Illinois-Missouri League | D | Canton Chinks, Galesburg Hornets, Hannibal Cannibals, Havana Perfectos, Macomb Potters, Monmouth Browns |
| Inland Empire League | D | Baker City Nuggets, La Grande Babes, Pendleton Pets, Walla Walla Walla Wallas |
| International League | D | Guelph Maple Leafs/St. Thomas Saints, Hamilton Hams, London Cockneys, Niagara Falls |
| Interstate League | D | Bradford Drillers, Erie Fishermen, Franklin Millionaires, Oil City Cubs, Olean Candidates, Warren Blues |
| Maine State League | D | Augusta, Bangor White Sox, Biddeford, Portland Blue Sox |
| Northern League | D | Brandon Angels, Duluth White Sox, Fargo Browns, Winnipeg Maroons |
| Ohio State League | D | Lancaster Lanks, Lima Cigarmakers, Mansfield Pioneers, Marion Diggers, Newark Newks, Springfield Reapers/Portsmouth Cobblers |
| Ohio-Indiana League | D | Huntingon Miamis, Muncie Fruit Jars, Richmond Quakers, Van Wert Buckeyes |
| Oklahoma-Kansas League | D | Bartlesville Boosters, Independence Jewelers, Iola Champs, McAlester Miners, Muskogee Redskins, Tulsa Oilers |
| Pennsylvania-West Virginia League | D | Charleroi Cherios, Clarksburg Drummers, Connellsville Cokers, Fairmont Badies, Scottdale Millers/Grafton Wanderers, Uniontown Coal Barons |
| South Carolina League | D | Chester, Orangeburg Edistoes, Rock Hill Catawbas, Sumter Gamecocks |
| Southern Michigan League | D | Battle Creek Crickets, Bay City, Flint Vehicles, Jackson Convicts, Kalamazoo White Sox, Lansing Senators, Saginaw Wa-was, Tecumseh |
| Western Canada League | D | |
| Wisconsin-Illinois League | D | Fond du Lac Cubs, Freeport Pretzels, Green Bay Tigers, La Crosse Pinks, Madison Senators, Oshkosh Indians, Rockford Reds, Wausau Lumberjacks |
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| Cuban General League | Foreign | Almendares, Fe, Habana, Matanzas |
| Cuban League | Foreign | Azul, Carmelita, Rojo |
| Cuban-American Major League Clubs Series | Foreign | Almendares, Brooklyn Royal Giants, Cincinnati Reds, Habana |
| Cuban-American Negro Clubs Series | Foreign | Almendares, Brooklyn Royal Giants, Habana |
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| California League | Independent | Alameda Encinals, Fresno Tigers, Oakland Commuters, Sacramento Senators, San Francisco Orphans, San Jose Prune Pickers, Santa Cruz Sand Crabs, Stockton Millers |
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| Atlantic League | No Classification | Allentown, Easton, Hazleton, Mount Carmel, Pottsville, Shamokin, Tamaqua, Wilkes-Barre |
| Harrisburg City League | No Classification | |
| Lake Shore League | No Classification | |
| Old Dominion League | No Classification | |
| Texas Valley League | No Classification | |
| Union Association | No Classification | Baltimore, Brooklyn Invaders, Elizabeth, Paterson/Allentown, Philadelphia, Reading, Washington, Wilmington |
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