Three things NFL should adopt from USFL, including running clock after incomplete passes depending on quarter
USFL Looks to Fill NFL Void With Spring Pro Football Action in Birmingham (Review)
How the USFL Differs from the NFL
USFL Rules Compared To The NFL (2022)
USFL teams/cities : r/xfl
Knights in the Pros: XFL Week 9/USFL Week 1 - Black & Gold Banneret
New rules coming to USFL this season
XFL vs USFL Which is Better, Who Survives? A surprisingly balanced analysis. : r/xfl
USFL, XFL plan to merge into one league