NFL: Can microchips in footballs help officials?
Football Zebras - Analysis and commentary of the NFL's officials and the calls they make
Football Zebras - Analysis and commentary of the NFL's officials and the calls they make
Week 1 referee assignments – Football Zebras
NFL Rumors: Carl Cheffers and All 17 Officiating Crews Revealed for 2023 Season, News, Scores, Highlights, Stats, and Rumors
NFL Officiating Crews for the 2023 NFL Season
Football Zebras - Analysis and commentary of the NFL's officials and the calls they make
VFL Match Replay, R18: Sandringham Zebras v Port Melbourne
First Cherokee official to officiate at 2023 Super Bowl, Sports
Zebra helps the NFL get into data overdrive - CNET
Cowboys-49ers: Who is the referee, officiating crew for Divisional Round game in 2023 NFL Playoffs - DraftKings Network