Minor League American Football
This is a record of A (4th Level Regional Leagues), Semi-Pro State Football Leagues and Amateur Gridiron Development Leagues. A American Football Leagues are Regional Professional Leagues, that come below the National Football League, AAA American Football Leagues and NCAA College Football. They are Regional in character i.e. being entirely based in either the Northeast/East Coast; Midwest; South or West.

AA American Football Leagues
Eastern Football League; Anthracite Football League;
Eastern Football Leagues
Anthracite Football League 1923-1924
Eastern Football League 1926-1927
Anthracite Football League 1928-1929
American Football Association 1936-1941 (Check this)
American Football League 1946-1950 (Check this)
Mid-Western Football Leagues
Mid-West Football League 1936-1937 (check This)
United Football League 1961-1964 (Check This)
Southern Football Leagues
Dixie Football League 1936-1941 (Check This)
The Spring League 2017-Present
Gridiron Developmental Football League 2015-2019
Gridiron Development Football League (Seasons): 2020
Western Football Leagues
Pacific Coast Football League 1926 (Check This)
Pacific Coast Pro Football League 1934-1935
Salinas Packers | California Pro American Football 1936-1937 (Check this)
California Football League 1938
Pacific Coast Pro Football League 1940-1948
Southwestern Football League 1972-1973
Picture Credit: [1] Gridiron Development Football League | Facebook (2019) Profile Picture June 24, 2019 [Internet] Available from: https://scontent-dub4-1.xx.fbcdn.net/v/t1.0-9/64898428_3342045482488280_78505804533071872_n.png?_nc_cat=106&_nc_ohc=WssFybmymiIAQkc4DdkVBfQCMiEf4BdPxJEcBO3luhWHvXLbQh08RTOOw&_nc_ht=scontent-dub4-1.xx&oh=15aa8944938de83a04aa6af0f68ba8a8&oe=5E41776F [Accessed 27 November 2019]
Semi-Pro State Leagues
The first Professional American Football League in America that openly paid its players was the Ohio League (1902-1919). Four of its leading teams, including the Canton Bulldogs asked teams in Pennsylvania and New York State to form a National League in 1920 – thus the NFL was born.
Semi-Pro Leagues exist all over USA, organised roughly on state lines.
Below you will find a link to Irish Connections throughout the USA

New York-Penn Football Leagues
Five Star Football League; Western Pennsylvania Pro Football Circuit
New York Metropolitan Area
Semi-Pro State American Football | Five Star Football League 2010-2017
Pennsylvania League
Western Penn Pro Football Circuit (Seasons): 1895 1896 (Check These)
National Football League (Seasons): 1902 (Check This)
Picture Credit: Picture Credit: 1920s football action. Thousands of spectators watch from double decker stadium seats. By Everett Collection[Shutterstock]

Eastern Mid-West Football Leagues
Ohio League; Indiana
Ohio League
Ohio League Champions 1903-1919
Ohio League 1915-1919 (Irish Players) (check This)
Ohio League (Seasons): 1904 1905 (Check These)
Indiana
Indiana State Football Championship (Seasons): 1920 (check this)
Picture Credit: Picture Credit: 1920s football action. Hundreds of spectators watch from stadium seats. Everett Collection [Sutterstock]

Upper South Football Leagues
Kentucky; Virginia-Carolina
Kentucky
Armco Semi-Pro Football Teams 1924-1929
Virginia-Carolina
Virginia-Carolina Football League 1937 (Check This)
Picture Credit: Picture Credit: 1920s football action. Thousands of spectators watch from double decker stadium seats. By Everett Collection[Shutterstock]

Texas and Southwest Football Leagues
Sevenman Tackle Football League
Texas
Sevenman Tackle Football League (Texas) 1999-2005
Picture Credit: [11] Sevenman | Wayback Machine (2004) STFL Logo [Internet] Available from: https://web.archive.org/web/20021126163725im_/http://www.sevenman.com/stfllogo.gif [Accessed 13 February 2020]

Mountain West Football Leagues
Montana
Montana Leagues
Butte Independent League 1920-1928
Picture Credit:
PIcture Credit: A worn and aged vintage old style American football helmet. Authentic and game-worn 1950s style football face mask and helmet By Brocreative[Shutterstock]

North West Football Leagues
Washington; Oregon
Northwest Leagues (Washington & Oregon)
Pacific Northwest Football League 1980
Northwest International Alliance 1980-1981
Northwest Football League 1982-1989
Picture Credit: Pexels Free Photos

California Football Leagues
Pacific Coast Football League; California Winter League
California
Pacific Coast Football League 2010-2019
California Football League 1938
Salinas Packers | California Pro American Football 1936-1937 (Check This)
Pacific Coast Pro Football League 1934-1935
Pacific Coast Football League 1926 (Check this)
Picture Credit: Picture Credit: 1920s football action. Hundreds of spectators watch from stadium seats. Everett Collection [Sutterstock]

Pacific & Mexico-America Leagues
Alaska; Super 8 Football League
Alaska
Alaska Football League 2015-2018
Mexico-America Football Leagues
California Leagues
Super 8 Football League West Coast 2016-Present
Mexico-USA Border Tournaments
Super 8 Football League Bowls & Tournaments 2010-Present
S8FL 8 Man Outdoor (TX-NV-CA: Seasons): 2020
S8FL Winter Bowl (CA-Baja: Seasons): 2014
Picture Credit:
Images
[13] Super 8 Football League (2018) Super 8 Football League Logo [Internet] Available from: http://super8footballleague.info/wp-content/uploads/2011/10/10378207_1545248759045177_2010222216677056541_n.jpg [Accessed 20 July 2019]