PITTSBURGH, PA - DECEMBER 20: Head coach Gary Kubiak of the Denver Broncos jaws with referee Carl Cheffers (51) after a punt returned for a touchdown by Jordan Norwood (11) was called back due to Broncos players stepping onto the field during the second half of the Steelers' 34-27 win at Heinz Field. The Pittsburgh Steelers hosted the Denver Broncos on Sunday, December 20, 2015. (Photo by AAron Ontiveroz/The Denver Post via Getty Images)