NFL referees throw record-breaking amount of flags - The Aggie
ESPN) Referee Ed Hochuli could face discipline for comments made to Cam Newton of Carolina Panthers : r/nfl
Report: NFL Planning To 'Crack Down' On Controversial Play In Week 2, The Spun
Yellow flags, red flags, black eyes for NFL's 100th season
Referee defends roughing the passer flag on Chiefs DL Chris Jones
7 totally unique ways NFL officials have robbed Detroit Lions this decade
ESPN Monday Night Football Conference Call Transcript - ESPN Press Room U.S.
What's the Deal With the NFL's Replacement Referees?, Smart News
Ten Years Later, the Failed Lessons From the Fail Mary - The Ringer
The worst officiating moments from a NFL Week 15 that was full of them
Why do football referees say the name of the team when announcing a time out but simply 'Offense' or 'Defense' when announcing a penalty? - Quora
American football - Wikipedia