CHICAGO, IL - OCTOBER 31: Head linesman Ed Walker is carted off the field after suffering an injury during the first quarter of the game between the Minnesota Vikings and the Chicago Bears at Soldier Field on October 31, 2016 in Chicago, Illinois. (Photo by Stacy Revere/Getty Images)
ORCHARD PARK, NY - OCTOBER 30: Referee John Parry #5 and field judge Jabir Walker #26 and line judge Jeff Seeman #45 and umpire Mark Pellis #131 and head linesman John McGrath #5 and side judge Keith Washington #7 congregate as they confer over a call during the Buffalo Bills NFL game against the New England Patriots at New Era Field on October 30, 2016 in Orchard Park, New York. (Photo by Tom Szczerbowski/Getty Images)
CHICAGO, IL - OCTOBER 31: Jay Cutler #6 of the Chicago Bears talks with referee Gene Steratore before the game against the Minnesota Vikings at Soldier Field on October 31, 2016 in Chicago, Illinois. (Photo by Stacy Revere/Getty Images)
HOUSTON, TX - OCTOBER 30: Field judge Tom Hill #97 during game action at NRG Stadium on October 30, 2016 in Houston, Texas. (Photo by Bob Levey/Getty Images)
HOUSTON, TX - OCTOBER 30: Referee Brad Allen discusses the result of the coin toss with Detroit Lions Safety Rafael Bush (31) and Detroit Lions Center Travis Swanson (64) as former President George H.W. Bush and others look on before the NFL football game between the Detroit Lions and Houston Texans on October 30, 2016 at NRG Stadium in Houston, TX. (Photo by Ken Murray/Icon Sportswire via Getty Images)
