| Cuban Winter League | | |
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| Cuban League | Foreign | |
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| National Colored Baseball League | Negro | Baltimore Lord Baltimores, Boston Resolutes, Louisville Falls City, New York Gorhams, Philadelphia Pythians, Pittsburgh Keystones |
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| Mountain League | | |
| Red River Valley League | | Fargo, Fergus Falls, Grand Forks, Wahpeton |
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| California League | No Classification | Oakland Greenhood & Morans, Sacramento Altas, San Francisco Haverlys, San Francisco Pioneers |
| Central Interstate League | No Classification | Decatur, Peoria |
| Central League | No Classification | |
| Central Pennsylvania League | No Classification | Ashland, Danville, Hazleton, Mahanoy City, Minersville, Mount Carmel, Shamokin Maroons, Sunbury |
| Chicago City League | No Classification | Chicago Aetnas, Chicago Diamonds, Chicago Franklins, Chicago Garden Citys, Chicago Picketts, Chicago Stars, Chicago West Ends, Chicago Whitings |
| Eastern League | No Classification | Bridgeport Giants, Danbury Hatters, Hartford Dark Blues, New Haven Blues, Springfield Horsemen, Waterbury Brass Citys |
| International Association | No Classification | Binghamton Crickets, Buffalo Bisons, Hamilton Hams, Jersey City Skeeters, Newark Little Giants, Oswego Starchboxes, Rochester Maroons, Scranton Miners, Syracuse Stars, Toronto Canucks, Utica Pent Ups, Wilkes-Barre Coal Barons |
| Kansas State League | No Classification | Arkansas City, Emporia, Joplin, Webb City, Wellington, Wichita, Winfield |
| Maine State League | No Classification | |
| Montana State League | No Classification | |
| Nebraska State League | No Classification | |
| New England League | No Classification | Boston Blues/Haverhill, Haverhill, Lawrence/Salem, Lowell Magicians, Lynn Lions, Manchester Farmers, Portland, Salem Fairies |
| Northeastern League | No Classification | Burlington, Malone, Montpelier, Rutland, St. Albans |
| Northern Michigan League | No Classification | Big Rapids, Evart, Greenville, Ionia, Reed City |
| Northwestern League | No Classification | Des Moines Hawkeyes, Duluth Freezers, Eau Claire, LaCrosse Freezers, Milwaukee Cream Citys, Minneapolis Millers, Oshkosh, St. Paul Saints |
| Ohio State League | No Classification | Akron Acorns, Canton, Columbus Buckeyes, Kalamazoo Kazoos, Mansfield, Sandusky Suds/Sands/Maroons, Steubenville Stubs, Wheeling, Zanesville Kickapoos |
| Pacific Coast League | No Classification | Oakland, San Francisco, San Francisco A & G's, San Francisco Damianas |
| Pennsylvania State Association | No Classification | Allentown Peanut Eaters, Altoona, Bradford, Johnstown, Reading, Scranton Miners, Wilkes-Barre Coal Barons, Williamsport Lumber Citys |
| Puget Sound League | No Classification | |
| Southern League | No Classification | Birmingham Ironmakers, Charleston Quakers, Memphis Browns, Mobile Swamp Angels, Nashville Blues, New Orleans Pelicans, Savannah |
| Southwestern League | No Classification | Fort Smith Indians, Hot Springs Blues, Joplin, Little Rock Giants, Pine Bluff Infants, Springfield Indians, Webb City Stars |
| Western League | No Classification | Denver, Emporia Reds, Hastings Hustlers, Kansas City Cowboys, Leavenworth Soldiers, Lincoln Tree Planters, Omaha Omahogs, St. Joseph Reds, Topeka, Wichita Braves |
| Western New York League | No Classification | Batavia, Leroy, Perry, Warsaw |