https://www.gridiron-magazine.com/?nfl=mike-carlsons-other-professional-football-leagues-pt-1
Carlson's other professional football leagues - Pt.1 - Gridiron Magazine
Jul 31, 2019 - With the AAF coming and going, and XFL2 due next year, the monolithic monopoly that is the NFL seems once again under challenge. This will not be the first...
other professional footballcarlsonleaguesptgridiron