With thanks to team photographers and Getty Images, here are photos of NFL officials during Week 4.
From team photographers (click on a photo to begin the gallery):
Land Clark (Las Vegas Raiders)
Greg Bradley (Indianapolis Colts)
Jabir Walker (Jacksonville Jaguars)
Clay Martin (Cleveland Browns)
Jim Quirk, Jr. (Indianapolis Colts)
Greg Meyer (Minnesota Vikings)
Alan Eck (Las Vegas Raiders)
Steve Patrick (Dallas Cowboys)
Dyrol Prioleau (New Orleans Saints)
Dale Shaw (Denver Broncos)
Brad Rogers (Minnesota Vikings)
Umpire Tab Slaughter, down judge Jerod Phillips and Eugene Hall downfield (Houston Texans).
John Hussey (New York Giants)
Greg Bradley (Indianapolis Colts)
Tim Podraza (New York Giants)
Terry Killens (Chicago Bears)
Carl Paganelli (Cincinnatti Bengals)
Terry Killens (Indianapolis Colts)
Rich Hall (New York Giants)
From Getty Images: