Is Jack Del Rio a good football coach? - Quora
John Fox, Broncos agree to part ways: Denver head coach out after playoff loss - Sports Illustrated
Jack Del Rio Named Head Coach of the Raiders
Jack Del Rio expected to replace John Fox as Broncos coach, new Elway hire – The Denver Post
John Fox (American football) - Wikipedia
John Fox Released from Hospital After Undergoing Open Heart Surgery
Former Jags head coach Jack Del Rio takes over in interim for Broncos coach John Fox
Contingency plan: Ranking the 32 NFL teams' likely interim coaches
Jack Del Rio steps in for ailing Broncos coach Fox