What do the letters stand for on the back of football referees' shirts? - Quora
A star in stripes: NFL makes a historic hire with N.J. official - nj.com
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Ed Hochuli, N.F.L. Referee, Has Long Had Fan Support - The New York Times
Johnny Grier, N.F.L.'s First Black Referee, Dies at 74 - The New York Times
Two officials take big hits from Illinois players | Yardbarker
Officials' Responsibilities & Positions | NFL Football Operations
Ask Sam Farmer: Are there throwback uniforms for NFL officials? - Los Angeles Times
Official (gridiron football) - Wikipedia
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Referee Sarah Thomas Will Make Super Bowl History - But She's Part of a Trend : NPR
Off-season is underway for NFL's part-time game officials, as league considers some full-time changes - cleveland.com
Do College Football Refs Have It In for Your Team? - Bloomberg
Ask Farmer: Why do NFL referees have numbers? - Los Angeles Times
Youth Football Officials Association Referee Agreement - Referee Letters In Football | US Legal Forms
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NFL announces retirement of referee Ed Hochuli, known for his bulging biceps and lengthy explanations - Los Angeles Times
/do0bihdskp9dy.cloudfront.net/08-16-2022/t_cfc361ddb76c47d0a2866035db1bd6ec_name_file_1280x720_2000_v3_1_.jpg "More referees needed for high school sports")
More referees needed for high school sports
NFL taking another look at adding an 8th official in preseason test – Football Zebras
Official (gridiron football) - Wikipedia
First Black woman to referee Big Ten football also has full-time job in financial services | The Gazette
History Made: Mississippi's first all-female officiating crew takes the field - By Torsheta Jackson - Mississippi Scoreboard
