Denver Broncos head coach John Fox will require heart surgery and will be out "several weeks", reports ESPN.com.
Fox will undergo aortic valve replacement surgery in North Carolina.
The 58-year-old was on the golf course where he was experiencing dizzy spells and was taken to hospital and told surgery could not wait any longer.
Despite missing their head coach, Fox's absence from the Broncos' sidelines shouldn't have much of an impact on their odds.
"Not from my points of view, said Peter Korner of the Las Vegas based oddsmaking serivce The Sports Club. "That largely stems from the fact that Peyton Manning is their quarterback and knows what to do."
The Broncos opened as 7-point faves at the LVH Superbook for their Week 10 matchup with San Diego Chargers.
There team has not yet named an interim head coach.