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)
Alex Kemp (Tampa Bay Buccaneers)
Tom Stephan (Kansas City Chiefs)
Shawn Smith and Dino Paganelli (Washington)
Matt Edwards (Tampa Bay Buccaneers)
Tom Stepher (Kansas City Chiefs)
Steve Zimmer (Houston Texans)
Patrick Turner (San Francisco 49ers)
Tom Stephan (Kansas City Chiefs)
Roy Ellison (Houston Texans)
Bruce Stritesky (Indianapolis Colts)
James Coleman (Pittsburgh Steelers)
Greg Yette (Pittsburgh Steelers)
Patrick Holt (Pittsburgh Steelers)
John Jenkins (Indianapolis Colts)
Shawn Smith (Washington)
Fred Bryan (Las Vegas Raiders)
John Jenkins (Cleveland Browns)
Bryan Neale (Washington)
Jonah Monroe (Pittsburgh Steelers)
Brad Allen (Atlanta Falcons)
Tom Eaton (Indianapolis Colts)
Dyrol Prioleau (Los Angeles Rams)
Jerry Bergman, Jr. (Houston Texans)
Shawn Smith (Los Angeles Rams)
Carl Paganelli (Chicago Bears)
Park Pellis (Pittsburgh Steelers)
Park Pellis (Pittsburgh Steelers)
Terry Killens (Carolina Panthers)
Brad Allen (Carolina Panthers)
Tom Eaton (Indianapolis Colts)
Bruce Stritesky (Cleveland Browns)
From Getty Images: