Courtesy of team photographers
(Click on an image in this set to open as slides.)

Umpire Ruben Fowler (John Biever/Packers)

Field judge Jimmy Buchanan (Michael C.Hebert/Saints)

Tony Corrente (Detroit Lions photo)

Field judge Bob Waggoner (Seattle Seahawks photo)

Umpire Bruce Stritesky (Arizona Cardinals photo)

Head linesman John McGrath (Denver Broncos photo)

Bill Leavy (Michael C. Hebert/Saints)

Back judge Steve Freeman (Denver Broncos photo)

Umpire Dan Ferrell (Detroit Lions photo)
Courtesy of Getty Images
Saint coach Sean Payton argues a call with head linesman Wayne Mackie:
Gene Steratore lends a hand to Russell Wilson:
Referee Walt Anderson talks with 49ers head coach Jim Harbaugh:
Line judge Jeff Bergman talks with Dolphins coach Joe Philbin:
Back judge Steve Freeman gets knocked down in a scrum:
Umpire Bryan Neale: