United States Football League (2022) - Wikipedia
Looking at the 2023 Super Bowl referee: Here's how Chiefs and
2022 USFL Championship Game - Wikipedia
A star in stripes: NFL makes a historic hire with N.J. official
Tra Blake earns promotion to referee, replacing Tony Corrente
Referee Clay Martin's crew assigned to work Ravens vs. Bengals
Officiating crews for the 2023 USFL season – Football Zebras
Referee Brad Allen's crew assigned to work Chiefs-Bills game
Referee Magazine - October 2018 by Referee Magazine - Issuu