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Open Leagues

Pacific Coast League (1952-1957, 6 seasons)

Negro Majors Leagues

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)

AAA Leagues

International League (1946-2016, 71 seasons)
Mexican League (6 team season) (1967-2016, 50 seasons)
Pacific Coast League (1946-2016, 65 seasons)
American Association (1946-1997, 46 seasons)
Inter-American League (1979, 1 season)

AA Leagues

Eastern League (1963-2016, 54 seasons)
Southern League (1964-2016, 52 seasons)
Texas League (1946-2016, 70 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)

Adv A Leagues

California League (1990-2016, 27 seasons)
Carolina League (1990-2016, 27 seasons)
Florida State League (1990-2016, 27 seasons)

A Leagues

Midwest League (1963-2016, 54 seasons)
South Atlantic League (1946-2016, 54 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)

A-1 Leagues

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

Short-Season A Leagues

New York-Pennsylvania League (1967-2016, 50 seasons)
Northwest League (1966-2016, 51 seasons)
Northern League (1966-1971, 6 seasons)

Rookie Leagues

Appalachian League (1963-2016, 54 seasons)
Arizona League (1988-2016, 29 seasons)
Gulf Coast League (1966-2016, 51 seasons)
Pioneer League (1964-2016, 53 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)

Negro Leagues

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)

B Leagues

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 League (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)

C Leagues

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 (1905-1954, 35 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)

Short-Season D Leagues

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

E Leagues

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

D Leagues

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, 8 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 League (1904-1905, 2 seasons)
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)

F Leagues

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)

Foreign Leagues

Dutch Major League (1999-2016, 18 seasons)
Italian Baseball League (2016, 1 season)
Japan Central League (1950-2016, 67 seasons)
Japan Pacific League (1950-2016, 67 seasons)
Korean Baseball Organization (1982-2016, 35 seasons)
Australian Baseball League (1989-2015, 16 seasons)
Cuban National Series (1961-2015, 55 seasons)
Italian Baseball League (1999-2013, 15 seasons)
Chinese Professional Baseball League (1990-2011, 22 seasons)
Israel Baseball League (2007, 1 season)
China Baseball League (2002-2005, 4 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 League (1878-1960, 83 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)

Fall Leagues

Arizona Fall League (1992-2015, 24 seasons)
California Fall League (1999, 1 season)
Maryland Fall League (1998, 1 season)

Winter Leagues

Florida Winter Baseball League (2009, 1 season)
Hawaii Winter League (1993-1997, 5 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)

Winter Leagues

Dominican Winter League (1937-2015, 66 seasons)
Mexican Pacific Winter League (1946-2015, 70 seasons)
Puerto Rican Winter League (1933-2015, 78 seasons)
Venezuelan Winter League (1944-2015, 71 seasons)
Probeis Winter League (2001-2004, 4 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)

Spring Leagues

Citrus League (1972, 1 season)

Women's Leagues

Foreign A Leagues

Tabasco League (2003, 1 season)

Foreign Rookie Leagues

Dominican Summer League (1985-2016, 32 seasons)
Venezuelan Summer League (1997-2015, 19 seasons)
Mexican Academy League (1997-2001, 5 seasons)
Mexican Rookie League (1968, 1 season)

Winter Rookie Leagues

Hawaii Winter Baseball (2006-2008, 3 seasons)
Florida Instructional League (1958-2007, 49 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)

Independent Leagues

American Association (1902-2016, 12 seasons)
Atlantic League (1895-2016, 20 seasons)
Canadian-American Association (2005-2016, 12 seasons)
Frontier League (1993-2016, 24 seasons)
Pacific Association (2014-2016, 3 seasons)
Pecos League (2011-2016, 6 seasons)
United League Baseball (2006-2014, 7 seasons)
North American League (2011-2012, 2 seasons)
Golden Baseball League (2005-2010, 6 seasons)
Northern League Central (1902-2010, 19 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)
Utah State League (1902, 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)

No Classification Leagues

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, 6 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)
Northern Independent League (1906, 1 season)
Geauga County League (1905, 1 season)
Montana State League (1887-1905, 5 seasons)
Northern New York League (1900-1905, 4 seasons)
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)
Western Interstate League (1883-1901, 5 seasons)
Central League (1887-1900, 4 seasons)
Indiana State League (1888-1900, 5 seasons)
International League (1886-1900, 5 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)

No Classification Leagues

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 (1917, 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)
Northern New York League (1904, 1 season)
Susquehanna League (1904, 1 season)

About the Minor League Data

Historical performance data for professional leagues (affiliated minor leagues, independent minor leagues, fall/winter leagues, and other international leagues) is provided by and licensed from 24-7 Baseball and Chadwick Baseball Bureau. It incorporates the work of many stalwart baseball researchers, including Cliff Blau, Art Cantu, Frank Hamilton, Reed Howard, Kevin Johnson, Bob McConnell, Jack Morris, and Ray Nemec, as well as members of the Minor Leagues Committee of the Society for American Baseball Research.

Perhaps most importantly, it builds upon the seminal work of Ed Washuta, who magnanimously provided the framework to make the whole thing possible.

Minor league Total Zone (Rctch&Rtz, 2005-2009) data provided by Baseballprojection.com and Minorleaguesplits.com.