NFL Officials: Preparing for Success | NFL Football Operations
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New Jersey native Robin DeLorenzo makes NFL debut as league's third female official - CBS New York
Ask Farmer: Why do NFL referees have numbers? - Los Angeles Times
All-Black officiating crew makes NFL history
Officials' Responsibilities & Positions | NFL Football Operations
NFL Officials: Preparing for Success | NFL Football Operations
Super Bowl LVI officiating crew by the numbers – Football Zebras
NFL Referee Assignments Week 11: Refs Assigned for Each NFL Game This Week
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NFL Referee Ron Torbert Makes the Tough Calls | Harvard Magazine
2023 Roster of NFL Officials | NFL Football Operations
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Peyton and Eli Manning admire referee Clete Blakeman's buff body - Outsports
Source - NFL prepping COVID-19 ref plan for Sunday's games - ESPN
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A numbers game: 2 officials change uniform numbers – Football Zebras
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NFL100: In 1979, the NFL renumbered its officials. After 3 years, they scrapped the failed plan – Football Zebras
Why Do NFL Referees Have Numbers on Their Uniforms?
NFL tweaks referee uniforms ... again - ESPN - Fandom - ESPN Playbook- ESPN
Lo van Pham honored to be first Asian American NFL official
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