Mexican Northern League (1971, 1 season)
Global League (1970, 1 season)
Western Canada League (1951-1961, 6 seasons)
Pan American Association (1960, 1 season)
Canadian-American League (1959, 1 season)
Southern Alberta League (1959, 1 season)
Saskatchewan League (1953-1954, 2 seasons)
Independent Negro (1914-1950, 37 seasons)
Manitoba Senior League (1949, 1 season)
Ohio Valley League (1949, 1 season)
Northwest League (1947, 1 season)
Carolina League (1936-1938, 3 seasons)
Tri-State League (1928-1938, 2 seasons)
Coastal Plain League (1934-1936, 3 seasons)
Wisconsin State League (1902-1936, 11 seasons)
Eastern Wisconsin League (1932-1935, 2 seasons)
Carolina Textile League (1934, 1 season)
East Texas League (1934, 1 season)
Permain Basin League (1934, 1 season)
Sacramento Valley League (1934, 1 season)
Wisconsin-Illinois League (1926-1932, 2 seasons)
Southwestern League (1928, 1 season)
Texas Association (1928, 1 season)
Midwest League (1923-1925, 3 seasons)
Sunshine League (1925, 1 season)
Placer-Nevada League (1924, 1 season)
West Arkansas League (1924, 1 season)
Western Ohio League (1923, 1 season)
Cotton States League (1919-1921, 2 seasons)
Florida East Coast League (1921, 1 season)
San Francisco Shipbuilders League (1918, 1 season)
Tri-Copper League (1916-1917, 2 seasons)
Blue Grass League (1915, 1 season)
Louisiana State League (1915, 1 season)
Northern Association (1914, 1 season)
Iowa State League (1911, 1 season)
Pennsylvania Railroad Clerks (1911, 1 season)
Central New York League (1910, 1 season)
Chicago City League (1910, 1 season)
Illinois-Iowa League (1910, 1 season)
Michigan State League (1910, 1 season)
Atlantic League (1907, 1 season)
Texas Valley League (1902-1907, 3 seasons)
Susquehanna League (1904, 1 season)

All-American Girls Professional Baseball League (1943-1954, 12 seasons)

Southeastern League (1896, 1 season)
Cumberland Valley League (1895, 1 season)
South Atlantic League (1895, 1 season)
Puget Sound League (1894, 1 season)

Hawaii Winter League (1993-1994, 2 seasons)
Florida Winter League (1960-1961, 2 seasons)
Southern California Winter League (1914-1957, 2 seasons)
California Winter League (1894-1947, 45 seasons)
Imperial Valley League (1914-1915, 2 seasons)

Citrus League (1972, 1 season)

Dominican Winter League (1937-1994, 45 seasons)
Mexican Pacific Winter League (1946-1994, 49 seasons)
Puerto Rican Winter League (1933-1994, 58 seasons)
Venezuelan Winter League (1944-1994, 50 seasons)
Colombian Winter League (1953-1985, 7 seasons)
Panama Winter League (1940-1968, 28 seasons)
Nicaraguan Winter League (1957-1966, 8 seasons)
Occidental Winter League (1954-1963, 9 seasons)
Veracruz Winter League (1952-1962, 9 seasons)
Northern Autumn League (1961, 1 season)
Panama-Nicaragua Winter League (1961, 1 season)
Roberto Avila League (1960-1961, 2 seasons)
Sonora Winter League (1958-1961, 4 seasons)
Cuban Winter League (1882-1960, 79 seasons)
Mexican Pacific Coast League (1951-1957, 7 seasons)
Canal Zone League (1948-1950, 3 seasons)
Cuban Independent Winter League (1947, 1 season)
Cuban Federation Winter League (1946, 1 season)

Arizona Fall League (1992-1994, 3 seasons)

Florida Instructional League (1958-1994, 36 seasons)
Arizona Instructional League (1960-1991, 32 seasons)
Florida Instructional League North (1969, 1 season)
Florida Instructional League South (1969, 1 season)
Peninsula Winter League (1959-1968, 10 seasons)
Arizona Rookie League (1964, 1 season)
Florida East Coast Instructional League (1964, 1 season)

Pacific Coast League (1952-1957, 6 seasons)

International League (1946-2013, 68 seasons)
Mexican League (1967-2013, 47 seasons)
Pacific Coast League (1946-2013, 62 seasons)
American Association (1946-1997, 46 seasons)
Inter-American League (1979, 1 season)

Eastern League (1963-2013, 51 seasons)
Southern League (1964-2013, 49 seasons)
Texas League (1946-2013, 67 seasons)
Dixie Association (1971, 1 season)
Mexican League (1955-1966, 12 seasons)
South Atlantic League (1963, 1 season)
Southern Association (1946-1961, 16 seasons)
American Association (1912-1945, 34 seasons)
International League (1912-1945, 34 seasons)
Pacific Coast League (1912-1945, 34 seasons)

California League (1990-2013, 24 seasons)
Carolina League (1990-2013, 24 seasons)
Florida State League (1990-2013, 24 seasons)

Midwest League (1963-2013, 51 seasons)
South Atlantic League (1946-2013, 51 seasons)
California League (1963-1989, 27 seasons)
Carolina League (1963-1989, 27 seasons)
Florida State League (1963-1989, 27 seasons)
Western Carolinas League (1963-1979, 17 seasons)
Mexican Center League (1963-1978, 16 seasons)
Lone Star League (1977, 1 season)
Gulf States League (1976, 1 season)
Mexican Pacific League (1976, 1 season)
Mexican Southeast League (1964-1970, 7 seasons)
Mexican Northern League (1968-1969, 2 seasons)
New York-Pennsylvania League (1933-1966, 9 seasons)
Northern League (1963-1965, 3 seasons)
Northwest League (1963-1965, 3 seasons)
Georgia-Florida League (1963, 1 season)
Pioneer League (1963, 1 season)
Eastern League (1895-1962, 56 seasons)
Western League (1892-1958, 56 seasons)
Western International League (1952-1954, 3 seasons)
Central League (1948-1951, 4 seasons)
Southern Association (1902-1935, 34 seasons)
Texas League (1921-1935, 15 seasons)
American Association (1903-1911, 9 seasons)
Pacific Coast League (1904-1911, 8 seasons)
Pacific National League (1903, 1 season)
Western Association (1888-1901, 3 seasons)
American League (1900, 1 season)
Atlantic League (1896-1899, 2 seasons)
Eastern Association (1891, 1 season)

Southern Association (1936-1945, 10 seasons)
Texas League (1936-1942, 7 seasons)

New York-Pennsylvania League (1967-2013, 47 seasons)
Northwest League (1966-2013, 48 seasons)
Northern League (1966-1971, 6 seasons)

Appalachian League (1963-2013, 51 seasons)
Pioneer League (1964-2013, 50 seasons)
Arizona League (1988-2012, 25 seasons)
Gulf Coast League (1966-2012, 47 seasons)
Florida East Coast League (1972, 1 season)
Florida Rookie League (1965, 1 season)
Cocoa Rookie League (1964, 1 season)
Sarasota Rookie League (1964, 1 season)

Carolina League (1949-1962, 14 seasons)
Northwest League (1955-1962, 8 seasons)
Illinois-Indiana-Iowa League (1902-1961, 53 seasons)
Big State League (1947-1957, 11 seasons)
Southwestern League (1956-1957, 2 seasons)
Piedmont League (1932-1955, 24 seasons)
Tri-State League (1907-1955, 18 seasons)
West Texas-New Mexico League (1955, 1 season)
Florida International League (1949-1954, 6 seasons)
Gulf Coast League (1951-1953, 3 seasons)
Interstate League (1897-1952, 18 seasons)
Western International League (1922-1951, 13 seasons)
Colonial League (1947-1950, 4 seasons)
Southeastern League (1926-1950, 17 seasons)
New England League (1892-1949, 31 seasons)
Mexican National League (1946, 1 season)
South Atlantic League (1921-1942, 17 seasons)
Quebec Provincial League (1940, 1 season)
Central League (1903-1934, 24 seasons)
Northeastern League (1934, 1 season)
Mississippi Valley League (1933, 1 season)
New York-Pennsylvania League (1923-1932, 10 seasons)
Virginia League (1895-1928, 11 seasons)
Michigan State League (1895-1926, 2 seasons)
Michigan-Ontario League (1919-1926, 8 seasons)
Quebec-Ontario-Vermont League (1924, 1 season)
Eastern Canada League (1922-1923, 2 seasons)
Pacific Coast International League (1918-1922, 4 seasons)
Western Canada League (1920-1921, 2 seasons)
Texas League (1892-1920, 11 seasons)
Northwest International League (1919, 1 season)
Eastern League (1916-1918, 3 seasons)
New York State League (1894-1917, 18 seasons)
Northwestern League (1905-1917, 13 seasons)
Canadian League (1914-1915, 2 seasons)
Eastern Association (1913-1914, 2 seasons)
Connecticut State League (1894-1912, 9 seasons)
Pacific National League (1904-1905, 2 seasons)
Pacific Northwest League (1892-1902, 2 seasons)
Southern Association (1886-1901, 8 seasons)
Western League (1900, 1 season)
Western Association (1895-1899, 5 seasons)
Atlantic League (1897-1898, 2 seasons)
Pennsylvania State League (1892-1896, 3 seasons)
Texas-Southern League (1895, 1 season)
Western Interstate League (1895, 1 season)
California League (1892, 1 season)
Montana State League (1892, 1 season)
Nebraska State League (1892, 1 season)

California League (1941-1962, 19 seasons)
Mexican Center League (1961-1962, 2 seasons)
Northern League (1913-1962, 23 seasons)
Pioneer League (1939-1962, 21 seasons)
Arizona-Mexico League (1955-1958, 4 seasons)
Central Mexican League (1955-1957, 3 seasons)
Evangeline League (1949-1957, 9 seasons)
Cotton States League (1936-1955, 15 seasons)
Longhorn League (1951-1955, 5 seasons)
Provincial League (1950-1955, 6 seasons)
Arizona-Texas League (1940-1954, 9 seasons)
Mountain States League (1954, 1 season)
West Texas-New Mexico League (1946-1954, 9 seasons)
Western Association (1904-1954, 36 seasons)
Southwest International League (1951-1952, 2 seasons)
Border League (1946-1951, 6 seasons)
Canadian-American League (1936-1951, 13 seasons)
Middle Atlantic League (1925-1951, 24 seasons)
East Texas League (1936-1950, 8 seasons)
Gulf Coast League (1950, 1 season)
Rio Grande Valley League (1950, 1 season)
Sunset League (1947-1950, 4 seasons)
Central Association (1947-1949, 3 seasons)
Carolina League (1945-1948, 4 seasons)
Florida International League (1946-1948, 3 seasons)
Lone Star League (1947-1948, 2 seasons)
Mountain State League (1942, 1 season)
Virginia League (1906-1942, 16 seasons)
Michigan State League (1940-1941, 2 seasons)
Cape Breton Colliery League (1939, 1 season)
Interstate League (1896-1939, 2 seasons)
East Dixie League (1934-1935, 2 seasons)
West Dixie League (1934-1935, 2 seasons)
Dixie League (1933, 1 season)
Piedmont League (1921-1931, 11 seasons)
Ontario League (1930, 1 season)
Utah-Idaho League (1926-1928, 3 seasons)
Florida State League (1921-1924, 4 seasons)
Southwestern League (1922-1923, 2 seasons)
South Atlantic League (1904-1920, 16 seasons)
Western Canada League (1919, 1 season)
Southern Michigan League (1911-1915, 3 seasons)
Colonial League (1914, 1 season)
Wisconsin-Illinois League (1910-1914, 5 seasons)
Canadian League (1912-1913, 2 seasons)
Central International League (1912, 1 season)
Minnesota-Wisconsin League (1911, 1 season)
Ohio-Pennsylvania League (1905-1911, 7 seasons)
Texas League (1897-1910, 9 seasons)
Hudson River League (1904-1907, 4 seasons)
Interstate Association (1906, 1 season)
Northern-Copper Country League (1906, 1 season)
South Texas League (1903-1906, 4 seasons)
Missouri Valley League (1904-1905, 2 seasons)
North Carolina League (1902, 1 season)
New York State League (1897-1901, 4 seasons)
Virginia-North Carolina League (1901, 1 season)
Southern League (1899, 1 season)
Central League (1897, 1 season)
New Pacific League (1896, 1 season)
Texas Association (1896, 1 season)
Iron And Oil League (1895, 1 season)

Alabama-Florida League (1936-1962, 16 seasons)
Florida State League (1919-1962, 29 seasons)
Georgia-Florida League (1935-1962, 22 seasons)
Midwest League (1956-1962, 7 seasons)
New York-Pennsylvania League (1957-1962, 6 seasons)
Western Carolina League (1948-1962, 8 seasons)
Sophomore League (1958-1961, 4 seasons)
Mexican Center League (1960, 1 season)
Sooner State League (1947-1957, 11 seasons)
Georgia State League (1906-1956, 13 seasons)
Nebraska State League (1910-1956, 20 seasons)
Pennsylvania-Ontario-New York League (1939-1956, 18 seasons)
Appalachian League (1911-1955, 28 seasons)
Kentucky-Illinois-Tennessee League (1903-1955, 31 seasons)
Mississippi-Ohio Valley League (1949-1955, 7 seasons)
Tar Heel League (1939-1954, 4 seasons)
Mountain States League (1911-1953, 8 seasons)
Wisconsin State League (1905-1953, 14 seasons)
Coastal Plain League (1937-1952, 12 seasons)
Kansas-Oklahoma-Missouri League (1946-1952, 7 seasons)
North Carolina State League (1913-1952, 19 seasons)
Far West League (1948-1951, 4 seasons)
Georgia-Alabama League (1913-1951, 14 seasons)
Ohio-Indiana League (1907-1951, 6 seasons)
Virginia League (1900-1951, 7 seasons)
Alabama State League (1940-1950, 7 seasons)
Blue Ridge League (1915-1950, 20 seasons)
Longhorn League (1947-1950, 4 seasons)
North Atlantic League (1946-1950, 5 seasons)
Tobacco State League (1946-1950, 5 seasons)
Eastern Shore League (1922-1949, 16 seasons)
Rio Grande Valley League (1931-1949, 2 seasons)
Evangeline League (1934-1948, 12 seasons)
Illinois State League (1947-1948, 2 seasons)
Ohio State League (1908-1947, 20 seasons)
Bi-State League (1915-1942, 10 seasons)
Florida East Coast League (1940-1942, 3 seasons)
Pennsylvania State Association (1934-1942, 9 seasons)
West Texas-New Mexico League (1937-1942, 6 seasons)
Mountain State League (1937-1941, 5 seasons)
Northeast Arkansas League (1909-1941, 9 seasons)
Western League (1939-1941, 3 seasons)
Arkansas-Missouri League (1936-1940, 5 seasons)
Northern League (1903-1940, 13 seasons)
Arizona-Texas League (1931-1939, 5 seasons)
Cape Breton Colliery League (1937-1938, 2 seasons)
Texas Valley League (1927-1938, 3 seasons)
Alabama-Mississippi League (1936, 1 season)
Oklahoma State League (1912-1936, 5 seasons)
Arkansas State League (1908-1935, 4 seasons)
Keystone League (1935, 1 season)
Cotton States League (1902-1932, 23 seasons)
Interstate League (1905-1932, 10 seasons)
Mississippi Valley League (1922-1932, 11 seasons)
East Texas League (1916-1931, 6 seasons)
Palmetto League (1931, 1 season)
Arizona State League (1928-1930, 3 seasons)
Old Dominion League (1930, 1 season)
California State League (1910-1929, 7 seasons)
Eastern Carolina League (1908-1929, 6 seasons)
Lone Star League (1927-1929, 3 seasons)
West Texas League (1920-1929, 5 seasons)
Anthracite League (1928, 1 season)
Gulf Coast League (1907-1926, 3 seasons)
Southwestern League (1904-1926, 5 seasons)
Texas Association (1923-1926, 4 seasons)
Tri-State League (1924-1926, 3 seasons)
Blue Grass League (1908-1924, 10 seasons)
North Dakota League (1923, 1 season)
Panhandle-Pecos Valley League (1923, 1 season)
South Dakota League (1920-1923, 2 seasons)
Dakota League (1921-1922, 2 seasons)
Texas-Oklahoma League (1911-1922, 6 seasons)
Alabama-Tennessee League (1921, 1 season)
Mississippi State League (1921, 1 season)
Northern Utah League (1921, 1 season)
Western Association (1911-1921, 7 seasons)
Louisiana State League (1920, 1 season)
Piedmont League (1920, 1 season)
Central Association (1908-1917, 10 seasons)
Central Texas League (1914-1917, 4 seasons)
Dixie League (1916-1917, 2 seasons)
Potomac League (1916, 1 season)
Atlantic League (1914-1915, 2 seasons)
Buckeye League (1915, 1 season)
Florida-Alabama-Georgia League (1915, 1 season)
Middle Texas League (1914-1915, 2 seasons)
Rio Grande Association (1915, 1 season)
Eastern Michigan League (1912-1914, 3 seasons)
Illinois-Missouri League (1908-1914, 7 seasons)
Kansas State League (1905-1914, 7 seasons)
Michigan State League (1897-1914, 6 seasons)
Pennsylvania-West Virginia League (1908-1914, 3 seasons)
Union Association (1911-1914, 4 seasons)
Virginia Mountain League (1914, 1 season)
Western Canada League (1907-1914, 8 seasons)
Western Tri-State League (1912-1914, 3 seasons)
Border League (1912-1913, 2 seasons)
Empire State League (1905-1913, 4 seasons)
Missouri-Iowa-Nebraska-Kansas League (1910-1913, 4 seasons)
New Brunswick-Maine League (1913, 1 season)
New York-New Jersey League (1913, 1 season)
Southern California League (1913, 1 season)
Southern Michigan League (1906-1913, 7 seasons)
Carolina Association (1908-1912, 5 seasons)
Central Kansas League (1908-1912, 5 seasons)
Iowa League of Professional Baseball Clubs (1904-1912, 5 seasons)
Massachusetts-Connecticut League (1912, 1 season)
Minnesota-Wisconsin League (1909-1912, 3 seasons)
Northern State of Indiana League (1909-1912, 4 seasons)
Ohio-Pennsylvania League (1912, 1 season)
Rocky Mountain League (1912, 1 season)
South Central League (1906-1912, 2 seasons)
Southeastern League (1910-1912, 3 seasons)
Washington State League (1910-1912, 3 seasons)
Canadian League (1899-1911, 3 seasons)
Central California League (1910-1911, 2 seasons)
Eastern Kansas League (1910-1911, 2 seasons)
Missouri State League (1911, 1 season)
San Joaquin Valley League (1910-1911, 2 seasons)
Southwest Texas League (1910-1911, 2 seasons)
Tidewater League (1911, 1 season)
Twin States League (1911, 1 season)
Connecticut Association (1910, 1 season)
Indiana-Michigan League (1910, 1 season)
Northern Association (1910, 1 season)
Southern California Trolley League (1910, 1 season)
Southern Illinois League (1910, 1 season)
Virginia Valley League (1910, 1 season)
West Michigan League (1910, 1 season)
West Virginia League (1910, 1 season)
Inter-Mountain League (1909, 1 season)
Wisconsin-Illinois League (1907-1909, 3 seasons)
Atlantic Association (1908, 1 season)
Eastern Illinois League (1907-1908, 2 seasons)
Inland Empire League (1902-1908, 2 seasons)
International League (1908, 1 season)
Maine State League (1907-1908, 2 seasons)
Oklahoma-Kansas League (1908, 1 season)
South Carolina League (1906-1908, 3 seasons)
New Hampshire State League (1907, 1 season)
North Texas League (1905-1907, 2 seasons)
Northern-Copper Country League (1907, 1 season)
Oklahoma-Arkansas-Kansas League (1907, 1 season)
Pennsylvania-Ohio-Maryland League (1906-1907, 2 seasons)
Southern New Hampshire League (1907, 1 season)
Western Pennsylvania League (1907, 1 season)
Arkansas-Texas League (1906, 1 season)
Southwest Washington League (1903-1906, 4 seasons)
Texas League (1902-1906, 3 seasons)
Copper Country Soo League (1905, 1 season)
Delta League (1904-1905, 2 seasons)
Virginia-North Carolina League (1905, 1 season)
Western Ontario Baseball Association (1905, 1 season)
Connecticut State League (1902-1904, 3 seasons)
Oregon State League (1904, 1 season)
Hudson River League (1903, 1 season)
Iowa-South Dakota League (1902-1903, 2 seasons)
Missouri Valley League (1901-1903, 3 seasons)
Southwest Iowa League (1903, 1 season)
Northern Maine League (1902, 1 season)
Northern New York League (1902, 1 season)
Pennsylvania State League (1901-1902, 2 seasons)
Illinois-Indiana-Iowa League (1901, 1 season)
Pacific Northwest League (1901, 1 season)
California League (1898, 1 season)
New Jersey State League (1897, 1 season)
South New Jersey League (1896, 1 season)

Appalachian League (1957-1962, 6 seasons)
Nebraska State League (1957-1959, 3 seasons)

Twin Ports League (1943, 1 season)
California League (1899, 1 season)
Indiana-Illinois League (1899, 1 season)
Connecticut State League (1891, 1 season)

Connecticut State League (1897-1901, 4 seasons)
Connecticut League (1899, 1 season)
New England League (1899, 1 season)
Iron And Oil League (1898, 1 season)
Ohio State League (1898, 1 season)
Pacific Northwest League (1898, 1 season)
Central Pennsylvania League (1897, 1 season)
Red River Valley League (1897, 1 season)

Dutch Major League (1999-2013, 15 seasons)
Italian Baseball League (1999-2013, 15 seasons)
Japan Central League (1950-2013, 64 seasons)
Japan Pacific League (1950-2013, 64 seasons)
Australian Baseball League (1989-2012, 13 seasons)
Korean Baseball Organization (1982-2012, 31 seasons)
Chinese Professional Baseball League (1990-2011, 22 seasons)
Cuban League (1878-2008, 94 seasons)
Israel Baseball League (2007, 1 season)
China Baseball League (2002-2004, 3 seasons)
Federation Francaise De Baseball (2002-2004, 3 seasons)
Japan Eastern League (1997-2004, 8 seasons)
Japan Western League (1997-2004, 8 seasons)
International Baseball League (1999-2003, 5 seasons)
Taiwan Major League (1997-2002, 6 seasons)
Cuban Pro. League (1960, 1 season)
Pro. League De Nicaragua (1960, 1 season)
Pro. League De Panama (1960, 1 season)
Japanese Baseball League (1939-1949, 11 seasons)
Japanese Baseball League (Fall) (1936-1938, 3 seasons)
Japanese Baseball League (Spring) (1936-1938, 3 seasons)
Cuban-American Negro Clubs Series (1904-1915, 9 seasons)
Cuban-American Major League Clubs Series (1908-1913, 6 seasons)
Cuban National League (1911-1912, 2 seasons)
Cuban General League (1905-1911, 7 seasons)
Havana League (1903-1904, 2 seasons)

Tabasco League (2003, 1 season)

Venezuelan Summer League (1997-2013, 17 seasons)
Dominican Summer League (1985-2012, 28 seasons)
Mexican Academy League (1997-2001, 5 seasons)
Mexican Rookie League (1968, 1 season)

American Association (1902-2013, 9 seasons)
Atlantic League (1895-2013, 17 seasons)
Canadian-American Association (2005-2013, 9 seasons)
Frontier League (1993-2013, 21 seasons)
Pecos League (2011-2013, 3 seasons)
North American League (2011-2012, 2 seasons)
Golden Baseball League (2005-2010, 6 seasons)
Northern League (1902-2010, 19 seasons)
United League Baseball (2006-2010, 5 seasons)
Arizona Winter League (2007-2009, 3 seasons)
Continental Baseball League (2007-2009, 3 seasons)
South Coast League (2007, 1 season)
Central League (2002-2005, 4 seasons)
Northeast League (1995-2004, 10 seasons)
Southwestern League (1895-2004, 2 seasons)
Arizona-Mexico League (2003, 1 season)
Canadian Baseball League (2003, 1 season)
Southeastern League (2002-2003, 2 seasons)
Western League (1995-2003, 9 seasons)
All-American Association (2001, 1 season)
Texas-Louisiana League (1994-2001, 8 seasons)
Heartland League (1996-1998, 3 seasons)
Big South League (1996-1997, 2 seasons)
Prairie League (1995-1997, 3 seasons)
North Atlantic League (1995-1996, 2 seasons)
Atlantic Coast League (1995, 1 season)
Golden State League (1995, 1 season)
Mid-America League (1995, 1 season)
North Central League (1994-1995, 2 seasons)
Great Central League (1994, 1 season)
Quebec Provincial League (1922-1970, 36 seasons)
Mandak League (1950-1955, 5 seasons)
Mexican League (1925-1954, 30 seasons)
Provincial League (1948-1949, 2 seasons)
Carolina Baseball League (1935-1938, 4 seasons)
Colonial League (1915, 1 season)
Federal League (1913, 1 season)
United States League (1912-1913, 2 seasons)
California League (1902-1909, 5 seasons)
Blue Mountain League (1907, 1 season)
Eastern Colored Independents (1907, 1 season)
Nevada State League (1907, 1 season)
Tri-State League (1904-1906, 3 seasons)
California State League (1904, 1 season)
Dawson League (1904, 1 season)
Pennsylvania League (1903-1904, 2 seasons)
Tennessee-Alabama League (1904, 1 season)
Pacific Coast League (1903, 1 season)
Cumberland Valley League (1896, 1 season)
Colorado State League (1895, 1 season)
Connecticut State League (1895, 1 season)
Eastern International League (1895, 1 season)
Eastern Interstate League (1895, 1 season)
Eastern Iowa League (1895, 1 season)
Iowa State League (1895, 1 season)
Kansas State League (1895, 1 season)
Missouri Valley League (1895, 1 season)
New England Association (1895, 1 season)
New Hampshire State League (1895, 1 season)
Northeastern League (1895, 1 season)
Northern Michigan League (1895, 1 season)
Northwestern League (1895, 1 season)
Ohio State League (1895, 1 season)
South New Jersey League (1895, 1 season)
Southern Illinois League (1895, 1 season)
Southwest Interstate League (1895, 1 season)
Upper Peninsula League (1895, 1 season)
Eastern New England League (1885, 1 season)

Negro American League (1951-1960, 10 seasons)
Baseball Association Of America (1949, 1 season)
United States Baseball League (1945-1946, 2 seasons)
West Coast Baseball League (1946, 1 season)
Negro Southern League (1920-1945, 18 seasons)
Negro Major Baseball League Of America (1942, 1 season)
Texas-Oklahoma Negro League (1933-1935, 3 seasons)
Texas Negro League (1924-1931, 8 seasons)
Texas-Louisiana League (1931, 1 season)
Denver City League (1930, 1 season)
Southern Negro League (1921, 1 season)
Ilip (1906, 1 season)
National Colored Baseball League (1887, 1 season)
Southern League Of Colored Base Ballists (1886, 1 season)

Negro American League (1937-1950, 14 seasons)
Negro National League (1920-1948, 28 seasons)
East-West League (1932, 1 season)
Negro Southern League (1932, 1 season)
American Negro League (1929-1931, 2 seasons)
Eastern Colored League (1923-1928, 6 seasons)
Southern Negro League (1920, 1 season)

Interstate Baseball League (1903, 1 season)
Northern New York League (1900, 1 season)
Wisconsin State League (1897, 1 season)
Cochero League (1896, 1 season)
Lehigh Valley League (1896, 1 season)
New York State League (1896, 1 season)
Schuykill Valley League (1894, 1 season)
Ohio Valley League (1891, 1 season)
Red River Valley League (1887-1891, 2 seasons)
Rhode Island League (1889-1891, 2 seasons)
Chicago Commercial League (1888, 1 season)
Philadelphia Region League (1888, 1 season)
Mountain League (1887, 1 season)
Central New York League (1886, 1 season)
Interstate League (1886, 1 season)
North Carolina League (1885, 1 season)
Texas League (1884, 1 season)

Mexican Northwest League (1958, 1 season)
Western Canada League (1958, 1 season)
Oahu League (1913, 1 season)
Iowa State League (1912, 1 season)
Missouri-Kansas League (1898-1912, 2 seasons)
Ohio Valley League (1890-1912, 2 seasons)
Southern Texas League (1912, 1 season)
Virginia Mountain League (1912, 1 season)
Atlantic League (1900-1909, 4 seasons)
Chicago City League (1887-1909, 5 seasons)
Eastern Association (1882-1909, 2 seasons)
Harrisburg City League (1908, 1 season)
Lake Shore League (1908, 1 season)
Old Dominion League (1908, 1 season)
Texas Valley League (1901-1908, 5 seasons)
Union Association (1908, 1 season)
California State League (1883-1906, 7 seasons)
Geauga County League (1905, 1 season)
Interstate League (1885-1903, 8 seasons)
Tennessee-Alabama League (1903, 1 season)
California League (1879-1901, 18 seasons)
Inter-Mountain League (1901, 1 season)
New England League (1877-1901, 9 seasons)
North Carolina League (1901, 1 season)
Northern New York League (1901, 1 season)
Wisconsin State League (1883-1901, 5 seasons)
Central League (1887-1900, 4 seasons)
Indiana State League (1888-1900, 5 seasons)
International League (1886-1900, 5 seasons)
Montana State League (1887-1900, 4 seasons)
North Carolina Association (1900, 1 season)
Provincial League (1900, 1 season)
Southern California League (1886-1900, 3 seasons)
Utah-Idaho League (1900, 1 season)
Eastern New York League (1899, 1 season)
Illinois-Iowa League (1890-1899, 4 seasons)
Ohio State League (1884-1899, 10 seasons)
Pacific States League (1898-1899, 2 seasons)
San Joaquin Valley League (1896-1899, 2 seasons)
Southwestern League (1887-1899, 5 seasons)
Canadian League (1885-1898, 7 seasons)
Central Pennsylvania League (1886-1898, 5 seasons)
Colorado State League (1885-1898, 7 seasons)
Kansas State League (1887-1898, 4 seasons)
Maine State League (1887-1898, 5 seasons)
New York State League (1884-1898, 6 seasons)
Pacific Coast League (1887-1898, 2 seasons)
Arizona League (1897, 1 season)
Arkansas State League (1894-1897, 2 seasons)
Kootenay And Washington League (1897, 1 season)
Lehigh Valley League (1897, 1 season)
Ohio-West Virginia League (1896-1897, 2 seasons)
South New Jersey League (1897, 1 season)
Southeastern League (1897, 1 season)
Southeastern Virginia League (1897, 1 season)
Texas-Southern League (1881-1897, 3 seasons)
Virginia League (1885-1897, 4 seasons)
Washington State League (1897, 1 season)
Blue Grass League (1892-1896, 2 seasons)
Central Connecticut League (1896, 1 season)
Illinois League (1896, 1 season)
Kentucky-Indiana League (1896, 1 season)
Michigan State League (1886-1896, 8 seasons)
Missouri State League (1896, 1 season)
Naugatuck Valley League (1896, 1 season)
Northeastern League (1887-1896, 2 seasons)
Pennyrile League (1896, 1 season)
San Francisco City League (1896, 1 season)
Schuykill Valley League (1895-1896, 2 seasons)
Southern Illinois League (1896, 1 season)
Canadian Association (1895, 1 season)
Beaver Valley League (1894, 1 season)
California Players League (1894, 1 season)
Canadian Midland League (1894, 1 season)
Eastern League (1884-1894, 7 seasons)
Merrimac Valley League (1894, 1 season)
Mississippi State League (1893-1894, 2 seasons)
Monongahela League (1894, 1 season)
Pennsylvania State League (1891-1894, 3 seasons)
Tri-State League (1888-1894, 5 seasons)
Western League (1885-1894, 6 seasons)
Western Ontario League (1884-1894, 2 seasons)
Ohio-Michigan League (1893, 1 season)
Oregon State League (1893, 1 season)
Western Association (1889-1893, 5 seasons)
Black Hills League (1891-1892, 2 seasons)
Central California League (1892, 1 season)
Central New Jersey League (1892, 1 season)
Florida State League (1892, 1 season)
Iron And Oil League (1885-1892, 2 seasons)
Kansas-Missouri League (1892, 1 season)
Mountain League (1892, 1 season)
South Atlantic League (1892, 1 season)
Wisconsin-Michigan League (1892, 1 season)
Central New Jersey League (1891, 1 season)
Independent (1877-1891, 6 seasons)
New York-Pennsylvania League (1890-1891, 2 seasons)
Northwestern League (1879-1891, 8 seasons)
Pacific Interstate League (1891, 1 season)
Pacific Northwestern League (1891, 1 season)
Puget Sound League (1887-1891, 2 seasons)
Upper Peninsula League (1888-1891, 3 seasons)
Western New York and Pennsylvania League (1890-1891, 2 seasons)
Atlantic Association (1889-1890, 2 seasons)
Central Interstate League (1887-1890, 4 seasons)
Eastern Interstate League (1888-1890, 2 seasons)
Eastern Iowa League (1890, 1 season)
International Association (1877-1890, 5 seasons)
Middle States League (1889-1890, 2 seasons)
New Brunswick League (1890, 1 season)
Pacific Northwest League (1890, 1 season)
Pennsylvania State Association (1886-1890, 3 seasons)
Rhode Island League (1890, 1 season)
Texas League (1888-1890, 3 seasons)
Western New York League (1886-1890, 3 seasons)
Delaware State League (1889, 1 season)
Illinois-Indiana League (1889, 1 season)
Southern League (1885-1889, 4 seasons)
Western Pennsylvania League (1888-1889, 2 seasons)
Central Atlantic League (1888, 1 season)
Central New York League (1888, 1 season)
Connecticut State League (1884-1888, 3 seasons)
Eastern International League (1888, 1 season)
Hudson River League (1885-1888, 3 seasons)
Interstate Association (1883-1888, 3 seasons)
New England Interstate League (1888, 1 season)
New Mexico League (1888, 1 season)
Saginaw Valley League (1888, 1 season)
Nebraska State League (1887, 1 season)
Northern Michigan League (1887, 1 season)
Georgia State League (1884-1886, 2 seasons)
Gulf League (1886, 1 season)
Illinois-Indiana-Iowa League (1886, 1 season)
New Hampshire State League (1885-1886, 2 seasons)
Keystone Association (1884-1885, 2 seasons)
Northeastern Connecticut State League (1885, 1 season)
Southern New England League (1885, 1 season)
Eastern New England League (1884, 1 season)
Iron & Oil Association (1884, 1 season)
Massachusetts State Association (1884, 1 season)
Ontario League (1884, 1 season)
Rhode Island Association (1884, 1 season)
League Alliance (1877-1882, 5 seasons)
Eastern Championship Association (1881, 1 season)
New California League (1881, 1 season)
National Association (1879-1880, 2 seasons)
Pacific League (1878-1880, 3 seasons)
Humboldt County League (1879, 1 season)
Non-League Players (1879, 1 season)