Member of NFL's first all-Black officiating crew has ties to DC area - WTOP News
Officiating head Al Riveron, NFL's 1st Hispanic ref, retires
Were the Chiefs Doomed by Bad Officiating or Their Own Mistakes? Yes. - The Ringer
NFL officiating video stresses new crown of the helmet rule - NBC Sports
NFL's First All-Black Crew Officiated 'Monday Night Football' Game : NPR
Veteran NFL referee on what it's like to officiate a Super Bowl
Another first for NFL referee Sarah Thomas: She's headed to the Super Bowl.
We Have A Problem - And The Valley Shook
It's a Rams-Patriots Super Bowl, and an Officiating Nightmare - Sports Illustrated
Super Bowl: Kansas City Chiefs' Grunhard talks Carl Cheffers