Denver Broncos head coach John Fox will undergo heart-valve surgery this week the team confirmed late Saturday night. As a result Fox will miss several weeks while he recovers from that surgery. The Broncos will eventually name an interim head coach -- possibly as early as Sunday -- and the top candidate is defensive coordinator Jack Del Rio.
Del Rio last worked as a head coach with the Jacksonville Jaguars in 2011, when he was fired as head coach after a nine-year stint running the Jags.
As defensive coordinator of the Broncos, Del Rio's seen his star rise again and has been mentioned in numerous head-coaching vacancies.
His experience, position and recent success make him a logical pick to be the Broncos interim coach while Fox is gone.
It's not a complete guarantee though: it's also possible the Broncos could tap running backs coach Eric Studesville to be the interim head coach.
Studesville was the interim head coach in 2010 after Josh McDaniels was fired.