| Cuban Winter League | | |
| California Winter League | | |
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| 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, Sacramento Sacts, San Francisco Seals, Vernon Tigers |
| Southern Association | A | Atlanta Crackers, Birmingham Barons, Little Rock Travelers, Memphis Turtles, Mobile Sea Gulls, Montgomery Climbers, Nashville Volunteers, New Orleans Pelicans |
| Western League | A | Denver Grizzlies, Des Moines Boosters, Lincoln Railsplitters, Omaha Rourkes, Pueblo Indians, Sioux City Packers, Topeka Jayhawks, Wichita Jobbers |
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| 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, New Britain Perfectos, New Haven Black Crows, Northampton Meadowlarks, Springfield Ponies, Waterbury Invincibles |
| Illinois-Indiana-Iowa League | B | Bloomington Bloomers, Cedar Rapids Rabbits, Davenport Prodigals, 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, Elmira Colonels, Scranton Miners, Syracuse Stars, Troy Trojans, Utica Pent-Ups, Wilkes-Barre Barons |
| Northwestern League | B | Grays Harbor Grays, Portland Colts, Seattle Turks, 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, York White Roses |
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| Ohio-Pennsylvania League | C | Akron Champs, Canton Watchmakers, East Liverpool Potters, Erie Sailors, McKeesport Tubers, New Castle Nocks/Alliance, Steubenville Stubs, Youngstown Indians |
| South Atlantic League | C | Augusta Tourists, Charleston Sea Gulls/Knoxville Appalachians, Chattanooga Lookouts, Columbia Gamecocks, Columbus Foxes, Jacksonville Jays, Macon Peaches, Savannah Indians |
| Texas League | C | Dallas Giants, Fort Worth Panthers, Galveston Sand Crabs, Houston Buffaloes, Oklahoma City Indians, 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 | Bartlesville Boosters, Enid Railroaders, Guthrie Senators, Joplin Miners/El Reno Packers, Muskogee Navigators, Pittsburg Pirates, Springfield Midgets, Webb City Webfeet/Sapulpa Oilers |
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| Arkansas State League | D | Alexandria Hoo Hoos, Argenta Shamrocks, Fort Smith Soldiers, Helena Hellions, Hot Springs Vaporites, Jonesboro, Monroe/Newport-Batesville Pearl Diggers, Texarkana |
| Blue Grass League | D | Frankfort Statesmen, Lexington Colts, Paris Bourbonites, 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, Hannibal Cannibals, Jacksonville Braves, Keokuk Indians, Kewanee Boilermakers, Ottumwa Packers, Quincy Vets, Waterloo Lulus |
| Central Kansas League | D | Abilene Red Sox, Beloit, Clay Center Cubs, Ellsworth Worthies, Junction City Soldiers, Manhattan Maroons, Minneapolis Minnies, Salina Trade Winners |
| Eastern Carolina League | D | Fayetteville Highlanders, Goldsboro Giants, Raleigh Red Birds, Rocky Mount Railroaders, Wilmington Sailors, Wilson Tobacconists |
| Illinois-Missouri League | D | Beardstown Infants, Canton Chinks, Galesburg Boosters, Macomb Potters, Monmouth Browns, Pekin Celestials |
| Inter-Mountain League | D | Boise/Bozeman Irrigators, Butte Miners, Helena Senators, Salt Lake City/Livingston Mormons |
| Interstate League | D | |
| Kansas State League | D | Arkansas City-Winfield Twins, Great Bend Millers, Hutchinson Salt Packers, Lyons Lions, McPherson Merry Macks, Newton Railroaders, Strong City-Cottonwood Falls Twins City/Larned Cowboys, Wellington Dukes |
| Minnesota-Wisconsin League | D | Duluth White Sox, Eau Claire Puffs, La Crosse Outcats, Superior Blues, Wausau Lumberjacks, Winona Pirates |
| Northeast Arkansas League | D | Jonesboro Zebras, Marianna Brickeys, Newport Pearl Diggers, Paragould Scouts |
| Northern State of Indiana League | D | Bluffton Babes, Huntington Johnnies, Kokomo Wild Cats, Lafayette Wets, Marion Boosters, Wabash Rockeries |
| Ohio State League | D | Lancaster Lanks, Lima Cigarmakers, Mansfield Pioneers, Marion Diggers, Newark Newks, Portsmouth Cobblers |
| Pennsylvania-West Virginia League | D | Charleroi/Parkersburg Parkers, Clarksburg Bees, Connellsville Cokers, Fairmont Champions, Grafton, Uniontown Coal Barons |
| Southern Michigan League | D | Adrian Yeggs, Battle Creek Crickets, Bay City, Flint Vehicles, Jackson Convicts, Kalamazoo Kazoos, Lansing Senators, Saginaw Wa-was |
| Western Canada League | D | Brandon Angels, Calgary Cowboys, Edmonton Eskimos, Lethbridge Miners, Medicine Hat Hatters, Moose Jaw Robin Hoods, Regina Bone Pilers, Winnipeg Maroons |
| Wisconsin-Illinois League | D | Appleton Papermakers, Fond du Lac Giants, Freeport Pretzels, Green Bay Bays, Madison Senators, Oshkosh Indians, Racine Belles, Rockford Reds |
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| Cuban General League | Foreign | Almendares, Fe, Habana |
| Cuban League | Foreign | |
| Cuban-American Major League Clubs Series | Foreign | All-Stars, Almendares, Detroit Tigers, Habana |
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| California League | Independent | Fresno Raisin Growers, Oakland Commuters, San Francisco Orphans, San Jose Prune Pickers, Santa Cruz Sand Crabs, Stockton Millers |
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| Atlantic League | No Classification | |
| Chicago City League | No Classification | |
| Eastern Association | No Classification | Amsterdam, Gloversville, Johnstown, Kingston Colonials, Middletown Orange Blossoms, Newburgh Colts, Poughkeepsie Students, Schenectady |
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