Denver Broncos coach John Fox is expected to miss 4-6 months after he undergoes an aortic heart valve replacement. Ian Rapoport of NFL Network reports that Denver expects to name an interim coach on Sunday, according to team sources. Source: The Redzone SteveRobWhatever's Take: Early word is Jack Del Rio is the early favorite to man the controls in Fox's absence. Del Rio was the former coach of the Jaguars where he finished with a regular season record of 68–71 and a 1–2 record in two playoff appearances over his nine years.