XFL rules innovations worth NFL examination
What is the rule in American Football for a player catching a ball and then falling down before he crosses the goal line or touches out of bounds? - Quora
XFL vs. AAF: What Is Difference in New Football Leagues?
XFL, USFL, other pro football leagues that took on the NFL
XFL 2023 trying to not be another start-up pro football league to fail
Pro football: Why the XFL could succeed where the AAF failed
Pro football: With AAF death, the game needs another league to survive
Column: XFL has edges over AAF — but can it weather inevitable losses? - The San Diego Union-Tribune
AAF,XFL, and USFL : r/USFL
XFL & IFL ANNOUNCE PLAYER PERSONNEL PARTNERSHIP - Indoor Football League