Here is a list of MAJOR Leagues[]
Baseball[]
All American Girls Baseball League 1943-1954
American Association 1882-1891
American League 1900-Present
National Association of Baseball Players 1857-1870
National Association 1871-1875
National League 1876-Present
Basketball[]
American Basketball Association 1967-1975
Basketball Association of America 1946-1948
National Basketball Association 1949-Present
National Women’s Basketball League 2001-2006
Women’s Basketball League 1978-1980
Women’s National Basketball Association 1997-Present
Football[]
OUTDOOR
All American Football League 1946-1949
American Football League 1926, 1936-1937, 1940-1941, 1960-1969
American Pro Football Association 1919-1921
Arena Football League 2010-Present
Canadian Football League 1958-Present
Eastern Canadian Football League 1941
Inter-Provincial Rugby Football League 1907-1915, 1919-1940
Inter-Provincial Rugby Football League 1943-1957
International Football Alliance 2025-Present
National Football League 1922-Present
United Football League 2024-Present
Western Rugby Football League 1936-1957
WOMEN'S
Independent Women’s Football League (IWFL Tier 1) 2001-2018
Independent Women’s Football League (IWFL Tier 2) 2008-2010
Independent Women’s Football League (IWFL Tier 3) 2012-2018
Legends Football League 2009-2019
Sugar and Spice Football League 2012-2016?
United States Women’s Football League 2015-Present
Women’s Football Alliance 2009-Present
Western Women’s Canadian Football League 2011-Present
X League 2025-Present
INDOOR
American Arena Football League 2 2024-Present
Arena Football League 2024
Arena Football One 2025-Present
American Pro Indoor Football (AIF) 2012-2016, 2024-Present
Champions Professional Indoor Football League 2013-Present
Great Lakes Arena Football League 2023-Present
Indoor Football League 2009-Present
National Arena Football League 2017-Present
North American Indoor Football League 2016-Present
The Arena Football League 2024-Present
Hockey[]
Canadian Women’s Hockey League 2007-2018
National Hockey League 1917-Present
National Women's Hockey League 2019-2022
Professional Women's Hockey League 2023-Present
Western Women’s Hockey League 2004-2011
Women’s National Hockey League 1998-2006
Soccer[]
Indoor Professional Soccer League 2016-????
Major Arena Soccer League 2014-Present
Major League Soccer 1996-Present
Mexican Soccer League 1902-1929, 1931-1933, 1935-Present
National Women’s Soccer League 2013-Present
Northern Super (Soccer) League 2025-Present
North American Soccer League 2011-2018?
Northern Super (Soccer) League 2025
All Other Sports[]
American Inline Hockey League 2008-2018
American Rugby Premiership 2014-2016
American Ultimate Disc League 2012-2023
Association of Fastpitch Professionals 2024-Present
League One Volleyball 2025-Present
Mexican Softball League 2024-Present
Midwest Rugby Premiership 2015-2016
Midwest Rugby Women’s Union 2016-20??
Major League Rugby 2018-Present
Major League Ultimate 2013-2017
National Lacrosse League 1989-Present
National Pro Fast Pitch League 2004-2019
National Ringette League 2004-Present
Pacific Rugby League 2014-2016
Premier Lacrosse League 2024-Present
Premier Ultimate League 2018-Present
Pro Volleyball Federation 2024-Present
Professional Inline Hockey League 1997-Present
Professional Inline Hockey League-Women’s Division 2009-2010
Professional Rugby League 2016
Red River Rugby Conference 2016-????
Ultimate Frisbee Association 2024-Present
United Women’s Lacrosse League 2016-2017
USA Rugby League 2011-Present
Western Ultimate League 2021-Present
Women’s Premier League Rugby 2009-Present
Women's Professional Fastpitch League 2023-Present
World Team Tennis 1974-1978, 1981-2021
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