| Colombian Winter League | | Indios, Torices Tigers, Vanytor, Willard Blues |
| Cuban Winter League | | Almendares, Cienfuegos, Havana, Marianao |
| Dominican Winter League | | |
| Mexican Pacific Coast League | | Ciudad Obregon, Culiacan, Guadalajara, Hermosillo, Mazatlan, Navojoa |
| Mexican Pacific Winter League | | |
| Occidental Winter League | | Cabimas, Espadon, Gavilanes, Pastora |
| Panama Winter League | | Carta Vieja Yankees, Chesterfield Smokers, Spur Cola |
| Puerto Rican Winter League | | Caguas-Guayama, Mayaguez-Aguadilla, Ponce, San Juan, Santurce |
| Venezuelan Winter League | | Caracas, Magallanes, Santa Maria, Venezuela Patriots |
| Veracruz Winter League | | Cordoba, Jalapa, Mexico City Aztecas, Mexico City Reds, Poza Rica Oilers, Puebla Parrots |
| Saskatchewan League | | |
| All-American Girls Professional Baseball League | | Fort Wayne Daisies, Grand Rapids Chicks, Kalamazoo Lassies, Rockford Peaches, South Bend Blue Sox |
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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, Columbus Red Birds, Indianapolis Indians, Kansas City Blues, Louisville Colonels, Minneapolis Millers, St. Paul Saints, Toledo Sox |
| International League | AAA | Buffalo Bisons, Havana Sugar Kings, Montreal Royals, Ottawa A's, Richmond Virginians, Rochester Red Wings, Syracuse Chiefs, Toronto Maple Leafs |
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| 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, Williamsport Grays |
| South Atlantic League | A | Augusta Rams, Charlotte Hornets, Columbia Reds, Columbus Cardinals, Jacksonville Braves, Macon Peaches, Montgomery Rebels, Savannah A's |
| Western International League | A | Calgary Stampeders, Edmonton Eskimos, Lewiston Broncs, Salem Senators, Spokane Indians, Tri-City Braves, Vancouver Capilanos, Victoria Tyees, Wenatchee Chiefs, Yakima Bears |
| Western League | A | Colorado Springs Sky Sox, Denver Bears, Des Moines Bruins, Lincoln Chiefs, Omaha Cardinals, Pueblo Dodgers, Sioux City Soos, Wichita Indians |
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| Big State League | B | Austin Pioneers, Bryan/Del Rio Indians, Corpus Christi Clippers, Galveston White Caps, Harlingen Capitals, Temple Eagles, Tyler Tigers, Waco Pirates |
| Carolina League | B | Burlington-Graham Pirates, Danville Leafs, Durham Bulls, Fayetteville Highlanders, Greensboro Patriots, High Point-Thomasville Hi-Toms, Reidsville Luckies, Winston-Salem Twins |
| Florida International League | B | Miami Beach Flamingos/Greater Miami Flamingos, Miami Sun Sox, St. Petersburg Saints, Tallahassee Rebels, Tampa Smokers, West Palm Beach Indians |
| Illinois-Indiana-Iowa League | B | Burlington Bees, Cedar Rapids Indians, Evansville Braves, Keokuk Kernels, Peoria Chiefs, Quincy Gems, Terre Haute Phillies, Waterloo White Hawks |
| Piedmont League | B | Colonial Heights-Petersburg Colts, Hagerstown Packets, Lancaster Red Roses, Lynchburg Cardinals, Newport News Dodgers, Norfolk Tars, Portsmouth Merrimacs, York White Roses |
| Tri-State League | B | Anderson Rebels, Asheville Tourists, Greenville Spinners, Knoxville Smokies, Rock Hill Chiefs, Spartanburg Peaches |
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| Arizona-Texas League | C | Bisbee-Douglas Copper Kings, Cananea Mineros, El Paso Texans, Juarez Indios, Mexicali Eagles, Nogales Yaquis, Phoenix Stars, Tucson Cowboys |
| California League | C | Bakersfield Indians, Channel Cities Oilers, Fresno Cardinals, Modesto Reds, Salinas Packers, San Jose Red Sox, Stockton Ports, Visalia Cubs |
| Cotton States League | C | El Dorado Oilers, Greenville Tigers, Hot Springs Bathers, Meridian Millers, Monroe Sports, Pine Bluff Judges |
| Evangeline League | C | Alexandria Aces, Baton Rouge Red Sticks, Crowley Millers, Lafayette Oilers, Lake Charles Lakers, New Iberia Pelicans, Port Arthur Sea Hawks, Texas City/Thibodaux Pilots |
| Longhorn League | C | Artesia Numexers, Big Spring Broncs, Carlsbad Potashers, Midland Indians, Odessa Oilers, Roswell Rockets, San Angelo Colts, Wichita Falls/Sweetwater Spudders |
| Mountain States League | C | Harlan Smokies, Kingsport Cherokees, Lexington Colts, Maryville-Alcoa/Morristown Twins, Middlesboro Athletics, Morristown Red Sox, Oak Ridge Pioneers |
| 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 Pilots, Great Falls Electrics, Idaho Falls Russets, Magic Valley Cowboys, Ogden Reds, Pocatello Bannocks, Salt Lake City Bees |
| Provincial League | C | Drummondville A's, Quebec Braves, Sherbrooke Indians, St. Jean Canadians, Thetford Mines Miners, Trois-Rivieres Phillies |
| West Texas-New Mexico League | C | Abilene Blue Sox, Albuquerque Dukes, Amarillo Gold Sox, Borger Gassers, Clovis Pioneers, Lubbock Hubbers, Pampa Oilers, Plainview Ponies |
| Western Association | C | Blackwell Broncos, Hutchinson Elks, Iola Indians, Joplin Cardinals, Muskogee Giants, Ponca City Jets, St. Joseph Saints, Topeka Owls |
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| Alabama-Florida League | D | Andalusia-Opp Indians, Crestview Braves, Dothan Rebels, Fort Walton Beach Jets, Graceville Oilers, Panama City Fliers |
| Appalachian League | D | Bluefield Blue-Grays, Bristol Twins, Johnson City Cardinals, Pulaski Phillies, Welch Miners, Wytheville Statesmen |
| Florida State League | D | Cocoa Indians, Daytona Beach Islanders, DeLand Red Hats, Jacksonville Beach Sea Birds, Lakeland Pilots, Orlando C.B.s |
| Georgia State League | D | Douglas Trojans, Dublin Irish, Hazlehurst-Baxley Cardinals, Sandersville Wacos, Statesboro Pilots, Vidalia Indians |
| Georgia-Florida League | D | Albany Cardinals, Americus-Cordele Orioles, Brunswick Pirates, Fitzgerald Redlegs, Thomasville Dodgers, Tifton Indians, Valdosta Tigers, Waycross Bears |
| Kentucky-Illinois-Tennessee League | D | Fulton Lookouts, Hopkinsville Hoppers, Jackson Generals/Central City Reds, Madisonville Miners, Mayfield Clothiers, Owensboro Oilers, Paducah Chiefs, Union City Dodgers |
| Mississippi-Ohio Valley League | D | Clinton Pirates, Danville Dans, Decatur Commodores, Dubuque Packers, Hannibal Cardinals, Mattoon Phillies, Mount Vernon Kings, Paris Lakers |
| Pennsylvania-Ontario-New York League | D | Bradford Phillies, Corning Red Sox, Erie Senators, Hamilton Cardinals, Hornell Dodgers, Jamestown Falcons, Olean Giants, Wellsville Braves |
| Sooner State League | D | Ada Herefords/Cementers, Ardmore Cardinals, Gainesville Owls, Lawton Braves, McAlester Rockets, Pauls Valley Raiders, Seminole Oilers, Shawnee Hawks |
| Tar Heel League | D | Hickory Rebels, Marion Marauders, Rutherford County Owls, Shelby Clippers |
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| Cuban League | Foreign | |
| Japan Central League | Foreign | Chunichi Dragons, Hiroshima Carp, Kokutetsu Swallows, Osaka Tigers, Taiyo-Shochiku Robins, Yomiuri Giants |
| Japan Pacific League | Foreign | Daiei Stars, Hankyu Braves, Kintetsu Pearls, Mainichi Orions, Nankai Hawks, Nishitetsu Lions, Takahashi Unions, Toei Flyers |
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| Mandak League | Independent | |
| Mexican League | Independent | Mexico City Azul, Mexico City Diablos Rojos, Monterrey Sultanes, Nuevo Laredo Tecolotes, Veracruz Aguila, Yucatan Leones |
| Quebec Provincial League | Independent | |
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| Negro American League | Negro | |