| Colombian Winter League | | Indios, Kola Roman, Vanytor, Willard |
| Cuban Winter League | | Almendares, Cienfuegos, Havana, Marianao |
| Dominican Winter League | | Aguilas Cibaenas, Escogido, Estrellas Orientales, Licey |
| Mexican Pacific Coast League | | Ciudad Obregon, Culiacan, Hermosillo, Los Mochis, Mazatlan, Navajoa |
| Mexican Pacific Winter League | | |
| Occidental Winter League | | Cabimas, Espadon, Gavilanes, Pastora |
| Panama Winter League | | Carta Vieja, Chesterfield, Spur Cola |
| Puerto Rican Winter League | | Caguas-Guayama, Mayaguez-Aguadilla, Ponce, San Juan Senators, Santurce Crabbers |
| Venezuelan Winter League | | Caracas, Magallanes, Pampero, Valencia |
| Veracruz Winter League | | Cordoba, Jalapa, Mexico City Aztecas, Mexico City Reds, Poza Rica, Puebla |
| Western Canada League | | |
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| Pacific Coast League | Open | Hollywood Stars, Los Angeles Angels, Oakland Oaks, Portland Beavers, Sacramento Solons, San Diego Padres, San Francisco Seals, Seattle Rainiers |
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| American Association | AAA | Charleston Senators, Denver Bears, Indianapolis Indians, Louisville Colonels, Minneapolis Millers, Omaha Cardinals, St. Paul Saints, Toledo Sox |
| International League | AAA | Buffalo Bisons, Columbus Jets, Havana Sugar Kings, Montreal Royals, Richmond Virginians, Rochester Red Wings, Syracuse Chiefs, Toronto Maple Leafs |
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| Mexican League | AA | Mexico City Diablos Rojos, Mexico City Tigres, Monterrey Sultanes, Nuevo Laredo Tecolotes, Veracruz Aguila, Yucatan Leones |
| Southern Association | AA | Atlanta Crackers, Birmingham Barons, Chattanooga Lookouts, Little Rock Travelers, Memphis Chickasaws, Mobile Bears, Nashville Volunteers, New Orleans Pelicans |
| Texas League | AA | Beaumont Exporters, Dallas Eagles, Fort Worth Cats, Houston Buffaloes, Oklahoma City Indians, San Antonio Missions, Shreveport Sports, Tulsa Oilers |
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| Eastern League | A | Albany Senators, Allentown Cardinals, Binghamton Triplets, Elmira Pioneers, Reading Indians, Schenectady Blue Jays, Wilkes-Barre Barons/Johnstown Johnnies, Williamsport Grays |
| South Atlantic League | A | Augusta Tigers, Charlotte Hornets, Columbia Reds, Columbus Cardinals, Jacksonville Braves, Macon Peaches, Montgomery Rebels, Savannah A's |
| Western League | A | Colorado Springs Sky Sox, Des Moines Bruins, Lincoln Chiefs, Pueblo Dodgers, Sioux City Soos, Wichita Indians |
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| Big State League | B | Austin Pioneers, Corpus Christi Clippers, Galveston White Caps, Harlingen Capitals, Port Arthur Sea Hawks, Texas City Texans, Tyler Tigers, Waco Pirates |
| Carolina League | B | Burlington-Graham Pirates, Danville Leafs, Durham Bulls, Fayetteville Highlanders, Greensboro Patriots, High Point-Thomasville Hi-Toms, Reidsville Phillies, Winston-Salem Twins |
| Illinois-Indiana-Iowa League | B | Burlington Bees, Cedar Rapids Raiders, Evansville Braves, Keokuk Kernels, Peoria Chiefs, Quincy Gems, Terre Haute Tigers, Waterloo White Hawks |
| Northwest League | B | Eugene Emeralds, Lewiston Broncs, Salem Senators, Spokane Indians, Tri-City Braves, Wenatchee Chiefs, Yakima Bears |
| Piedmont League | B | Hagerstown Packets, Lancaster Red Roses, Lynchburg Cardinals, Newport News Dodgers, Norfolk Tars, Portsmouth Merrimacs, Sunbury Redlegs, York White Roses |
| Tri-State League | B | Asheville Tourists, Greenville Spinners, Rock Hill Chiefs, Spartanburg Peaches |
| West Texas-New Mexico League | B | Abilene Blue Sox, Albuquerque Dukes, Amarillo Gold Sox, Clovis Pioneers, El Paso Texans, Lubbock Hubbers, Pampa Oilers, Plainview Ponies |
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| Arizona-Mexico League | C | Bisbee-Douglas Copper Kings, Cananea Mineros, Globe-Miami Miners, Mexicali Eagles, Nogales Yaquis, Phoenix Stars, Tucson Cowboys, Yuma Sun Sox |
| California League | C | Bakersfield Indians, Channel Cities Oilers/Reno Silver Sox, Fresno Cardinals, Modesto Reds, Salinas Packers, San Jose Red Sox, Stockton Ports, Visalia Cubs |
| Central Mexican League | C | |
| Cotton States League | C | El Dorado Oilers, Greenville Bucks, Hot Springs Bathers, Monroe Sports, Pine Bluff Judges/Meridian Millers, Vicksburg Hill Billies |
| Evangeline League | C | Alexandria Aces, Baton Rouge Red Sticks, Crowley Millers, Lafayette Oilers, Lake Charles Lakers, New Iberia Pelicans |
| Longhorn League | C | Artesia Numexers, Big Spring Cosden Cops, Carlsbad Potashers, Hobbs Sports, Midland Indians, Odessa Eagles, Roswell Rockets, San Angelo Colts |
| Northern League | C | Aberdeen Pheasants, Duluth Dukes, Eau Claire Braves, Fargo-Moorhead Twins, Grand Forks Chiefs, St. Cloud Rox, Superior Blues, Winnipeg Goldeyes |
| Pioneer League | C | Billings Mustangs, Boise Braves, Great Falls Electrics, Idaho Falls Russets, Magic Valley Cowboys, Ogden Reds, Pocatello Bannocks, Salt Lake City Bees |
| Provincial League | C | Burlington A's, Quebec Braves, Sherbrooke Indians, St. Jean Canadians, Thetford Mines Miners, Trois-Rivieres Phillies |
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| Alabama-Florida League | D | Crestview Braves, Donalsonville Seminoles, Dothan Cardinals, Fort Walton Beach Jets, Graceville Oilers, Panama City Fliers |
| Appalachian League | D | Bluefield Blue-Grays, Bristol Twins, Johnson City Cardinals, Kingsport Cherokees, Pulaski Phillies, Salem Rebels, Welch Miners/Marion A's, Wytheville Statesmen |
| Florida State League | D | Cocoa Indians, Daytona Beach Islanders, Gainesville G-Men, Lakeland Pilots, Orlando C.B.s, Sanford Cardinals, St. Petersburg Saints, West Palm Beach Indians |
| Georgia State League | D | Douglas Trojans, Dublin Irish, Hazlehurst-Baxley Cardinals, Sandersville Giants, Statesboro Pilots, Vidalia Indians |
| Georgia-Florida League | D | Albany Cardinals, Brunswick Pirates, Cordele Orioles, Moultrie Reds, Thomasville Dodgers, Tifton Blue Sox, Valdosta Tigers, Waycross Bears |
| Kentucky-Illinois-Tennessee League | D | Fulton Lookouts, Madisonville Miners, Mayfield Clothiers, Owensboro Oilers, Paducah Chiefs, Union City Dodgers |
| Mississippi-Ohio Valley League | D | Clinton Pirates, Decatur Commodores, Dubuque Packers, Hannibal Citizens, Kokomo Giants, Lafayette Chiefs, Mattoon Phillies, Paris Lakers |
| Pennsylvania-Ontario-New York League | D | Bradford Phillies, Corning Red Sox, Erie Senators, Hamilton Cardinals, Hornell Dodgers, Jamestown Falcons, Olean Oilers, Wellsville Braves |
| Sooner State League | D | Ardmore Cardinals, Gainesville Owls/Ponca City Cubs, Lawton Braves, McAlester Rockets, Muskogee Giants, Paris Orioles, Seminole Oilers, Shawnee Hawks |
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| Cuban League | Foreign | |
| Japan Central League | Foreign | Chunichi Dragons, Hiroshima Carp, Kokutetsu Swallows, Osaka Tigers, Taiyo Whales, Yomiuri Giants |
| Japan Pacific League | Foreign | Daiei Stars, Hankyu Braves, Kintetsu Pearls, Mainichi Orions, Nankai Hawks, Nishitetsu Lions, Toei Flyers, Tombo Unions |
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| Mandak League | Independent | Minot |
| Quebec Provincial League | Independent | |
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| Negro American League | Negro | |