Enjoy the following photos of officials in action, courtesy of team photographers and Getty Images. Click on a photo to start the gallery:
Rich Hall (Oakland Raiders)
Brad Allen and Fred Bryan (Philadelphia Eagles)
Jeff Seeman (Green Bay Packers)
Lee Dyer (Pittsburgh Steelers)
Clay Martin (New York Giants)
Mike Weatherford (New Orleans Saints)
Ruben Fowler (Chicago Bears)
John Parry (Green Bay Packers)
Gary Arthur (Minnesota Vikings)
Jabir Walker (Philadelphia Eagles)
Scott Helverson (Denver Broncos)
John Parry (Green Bay Packers)
Carl Paganelli (Detroit Lions)
Mike Weatherford (New Orleans Saints)
Brad Allen (Philadelphia Eagles)
Gary Arthur (Minnesota Vikings)
Gene Steratore (Minnesota Vikings)
Mike Spanier (Green Bay Packers)
Perry Paganelli and Dave Meslow (Green Bay Packers)
From Getty Images: