With thanks to team photographers and Getty Images, here are photos of NFL officials on the field during Week 5.
From team photographers (click on a photo to begin the gallery)
Patrick Holt (Pittsburgh Steelers)
John Jenkins (Indianapolis Colts)
Tom Stephan (Kansas City Chiefs)
John Jenkins (Cleveland Browns)
Carl Paganelli (Chicago Bears)
Jonah Monroe (Pittsburgh Steelers)
Brad Allen (Carolina Panthers)
Bruce Stritesky (Cleveland Browns)
Tom Stephan (Kansas City Chiefs)
Fred Bryan (Las Vegas Raiders)
Patrick Turner (San Francisco 49ers)
Tom Eaton (Indianapolis Colts)
Steve Zimmer (Houston Texans)
Matt Edwards (Tampa Bay Buccaneers)
James Coleman (Pittsburgh Steelers)
Greg Yette (Pittsburgh Steelers)
Park Pellis (Pittsburgh Steelers)
Tom Stepher (Kansas City Chiefs)
Dyrol Prioleau (Los Angeles Rams)
Shawn Smith (Los Angeles Rams)
Park Pellis (Pittsburgh Steelers)
Brad Allen (Atlanta Falcons)
Terry Killens (Carolina Panthers)
Bryan Neale (Washington)
Tom Eaton (Indianapolis Colts)
Shawn Smith (Washington)
Alex Kemp (Tampa Bay Buccaneers)
Roy Ellison (Houston Texans)
Jerry Bergman, Jr. (Houston Texans)
Bruce Stritesky (Indianapolis Colts)
Shawn Smith and Dino Paganelli (Washington)
From Getty Images: