Photos of the officials in action as captured by team photographers. Click on any photo to view the slideshow.
Referee Alberto Riveron makes sure that all parties return to a neutral corner after a sack by Texans defensive end J.J. Watt. (Houston Texans photo)
Texans coach Gary Kubiak discusses a call with side judge Jimmy DeBell. (Houston Texans photo)
Line judge Gary Arthur has his eyes on the feet of Texans running back Arian Foster. (Houston Texans photo)
Referee Scott Green and back judge Scott Helverson preside over the coin toss. (Jim Biever/Green Bay Packers)
Umpire Bruce Stritesky (108) watches the defensive line as they meet Vikings running back Adrian Peterson. (Minnesota Vikings photo)
Referee Scott Green follows Vikings quarterback Joe Webb. (Minnesota Vikings photo)
Head linesman Dana McKenzie on the sideline (Baltimore Ravens photo)
Head linesman Derick Bowers signals a touchdown by Seahawks fullback Michael Robinson. (Seattle Seahawks photo)
