NFL Officials: Preparing for Success | NFL Football Operations
Ask Farmer: Why do NFL referees have numbers? - Los Angeles Times
Why Football Referees Have Letters & Numbers – vIQtory Sports
NFL Relaxes Restrictions on Jersey Numbers - The New York Times
How Much Are NFL Referees Paid? | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
Ed Hochuli, N.F.L. Referee, Has Long Had Fan Support - The New York Times
Super Bowl LIV: How NFL Measures First Downs Is Primitively Low-Tech
All the Gear Super Bowl 50 Refs Will Use to Call the Game | WIRED
Super Bowl 2022 referee, officials: Who is assigned to Rams vs. Bengals? | Sporting News
What do the letters stand for on the back of football referees' shirts? - Quora
College football referees have an impossible job. Here's why - Sports Illustrated
Who Are the NFL's Best, Worst Refs? | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
Empty stadium impact on referee decisions, home field advantage - Sports Illustrated
New NFL font
Why Do NFL Referees Have Numbers on Their Uniforms?
What do the letters stand for on the back of football referees' shirts? - Quora
Column: NFL officials make far too many mistakes, and it's worse in the playoffs - The San Diego Union-Tribune
US referee numbers are plunging and aggression is to blame | Referees | The Guardian
How Much Are NFL Referees Paid? | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
Misogyny greets World Cup's first female refs – DW – 06/29/2022
Why Football Referees Have Letters & Numbers – vIQtory Sports
Yeah, the O-line is important, but referees are Tom Brady's best friends
Ump Attire - The NFL is back! Let's wish our officials... | Facebook
Why Football Referees Have Letters & Numbers – vIQtory Sports
