Carl Cheffers, Super Bowl referee, has history of penalties vs. Chiefs - The Washington Post
Missed calls aplenty, and the NFL is looking for fixes
The NFL Is Calling an Absurd Number of Penalties This Year and It Will Drive Fans Nuts
Decoding American Football Penalties: A Comprehensive Guide - HowTheyPlay
From holding to head-butting: Here are the most and least common penalties in sports - ESPN
NFL standing behind referees on the taunting call made by the refs last Monday against the bears . : r/steelers
Holding calls plummet after call to referees - ESPN
Former NFL Referee Mike Pereira Predicts Illegal Contact Calls Will 'Frustrate the Daylights' Out of Fans in the 2022 NFL Season
False start? Refs missing flags on KC Chiefs RT vs. Detroit Lions
Why opposing fans and players think NFL refs are favoring the Patriots
Sorry about that, NFL chief says of replacements