"Our focus at this time is Coach Fox's health and well-being," the team said in a statement. "We extend our thoughts and well-wishes to him for a full and speedy recovery."
Fox was advised by doctors months ago that he would eventually require this procedure. The plan was to undergo the surgery after the season. After Saturday's incident, they decided he couldn't wait any longer.
"I sincerely appreciate all of the support from friends, Denver Broncos fans and so many around the league today," Fox said. "Although I am disappointed I must take some time away from the team to attend to this pre-existing health condition, I understand that it's the right thing to do.
"I have great confidence in our coaches and players, who are fully committed to our goals. I look forward to returning to coaching as soon as possible."
We wish Fox the best in his recovery.