https://en.wikipedia.org/wiki/List_of_American_and_Canadian_football_leagues

This is a list of leagues in American football and Canadian football. There have been professional football leagues of varying levels since the .... All American Football League, 2007; United States Big Northeast Football Federation 2007– 2012 ...

https://en.wikipedia.org/wiki/Professional_football_(gridiron)

While the practice of professional and semi-pro teams ... Football League of 1902 , the first all-professional league.

https://en.wikipedia.org/wiki/Alliance_of_American_Football

The Alliance of American Football (AAF) was a professional American football league, founded by Charlie Ebersol and Bill Polian. The AAF consisted of eight centrally owned and operated teams, all in the ...

https://www.cbssports.com/nfl/news/from-aaf-to-xfl-to-pacific-pro-football-and-more-heres-a-guide-to-all-the-new-non-nfl-football-leagues/

Feb 13, 2019 ... Founded in 1920 as the American Professional Football Association (another stinkin' name!), it became the ... The Canadian Football League is the only major professional football league in Canada. .... See All Newsletters.

https://www.latimes.com/sports/sportsnow/la-sp-alliance-american-football-20180320-story.html

Mar 20, 2018 ... The Alliance of American Football league was announced Tuesday ... All extra- point attempts will be two-point conversions from the 2-yard line.

https://www.foxbusiness.com/features/xfl-usfl-other-pro-football-leagues-that-took-on-the-nfl

Dec 6, 2018 ... Two new leagues, the AAF and the XFL, are set to kick off by 2020. ... to sustain more than one major professional football league in the past.

https://en.wikibooks.org/wiki/Football_(Soccer)/The_Leagues_and_Teams

UEFA (Union of European Football Associations) is the governing confederation of all European teams and leagues. Many prominent leagues and teams ...

https://www.usatoday.com/story/sports/nfl/2019/04/03/aaf-joins-xfl-usfl-wfl-start-up-pro-football-leagues-failed/3349422002/

Apr 3, 2019 ... AAF's failure begs question: Can any pro football league survive without NFL's help ..... only one start-up outdoor professional football league survived. ... Despite all of this, McMahon is reincarnating the XFL for a 2020 launch.

https://www.fromthegrapevine.com/lifestyle/international-football-leagues-american-football-around-globe

Dec 26, 2014 ... Here are a few of the finest American football leagues around the globe: ... But, in all fairness, the NFL isn't the only game going on here in the states. ... colleges and universities before the first professional championship was ...

https://www.nytimes.com/2019/02/05/sports/football-new-league.html

Feb 5, 2019 ... The leagues have had strange rules, quirky names and colorful owners. But the ... entrepreneurs to try to cash in by starting professional football leagues of their own. ... None have succeeded, but all had their share of novelty.