Flag Football was invented in the 1940s as a non-contact version of American Football.
The first Pro leagues were set up in the coming decades, with a America-wide League currently in operation with Regional Playoffs followed by a Final with a purse of $1 Million, which includes teams of former NFL players.
Below you will find links to Top-Level Leagues Worldwide:
European Champions Bowl:
Scottish Flag Football Association 2003-2007: https://eirball.ie/2020/04/20/scottish-flag-football-association-senior-2003-2007/