A simple info graphic for showing refs how to call end game situations. : r/GreenBayPackers
Carl Cheffers' crew may bring flag-happy approach to Super Bowl 2023
NFL playoff officiating decisions - What happened on controversial calls -- right and wrong -- and what came next - ESPN
Super Bowl 2021: Officials have thrown fewer flags this season, will that trend continue in Super Bowl LV?
Must be terrible for officials to impact the results of a game, huh KC? : r/Patriots
February 2021 – Captain Comeback: NFL Analysis by Scott Kacsmar
Seahawks Humbled In Week 2 Loss To 49ers
Carl Cheffers, Super Bowl referee, has history of penalties vs. Chiefs - The Washington Post
Was Super Bowl LI rigged? - Quora
Will the Super Bowl Be Decided by Penalties? - The New York Times
Super Bowl 2021: Chiefs first half marred by record-setting penalties