Here's how much NFL referees get paid
Wayne Mackie, longtime NFL linesman and member of officiating department, dies at 62
NFL's First All-Black Crew Officiated 'Monday Night Football' Game : NPR
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What it takes to be an NFL white hat – Football Zebras
Under Armour Referee Cap | Ump Attire
NFL first marked with whistle and hat | Pro Football Hall of Fame Official Site
Upstate NY native Maia Chaka makes history as NFL's first Black female referee - syracuse.com
NFL officials honor late colleague with patch on hats – Football Zebras
Official (gridiron football) - Wikipedia
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NFL Referees Association Releases Statement To Address Damar Hamlin Situation - AthlonSports.com | Expert Predictions, Picks, and Previews
Ed Hochuli, N.F.L. Referee, Has Long Had Fan Support - The New York Times
Here's how much money NFL officials make working games - NBC Sports Chicago
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The NFL's 'all-star' officiating crews are ruining the playoffs - The Boston Globe
