Sources: John Fox Taken To Hospital
Source: ESPN.com 
Denver Broncos coach John Fox was hospitalized Saturday after experiencing heart attack symptoms, sources told ESPN NFL Insiders Chris Mortensen and Adam Schefter.
Broncos coach John Fox was taken to Charlotte area hospital from golf course when he complained of chest pains. Broncos believe he is ok.
— Chris Mortensen (@mortreport) November 2, 2013 
The Broncos released a statement confirming that the 58-year-old Fox was taken to a Charlotte hospital after feeling “light-headed” while playing golf.
“Denver Broncos Head Coach John Fox was taken to a Charlotte-area hospital after feeling light-headed while playing golf on Saturday,” the Broncos’ statement said. “He is being held at the hospital for testing and further observation. Our medical staff is currently in contact with Coach Fox, his family and the doctors who are treating him.
Text from John Fox says he's doing fine, awaiting test results, know more in few hours. Has sense of humor. Said don't believe all in media
— Ed Werder (@Edwerderespn) November 2, 2013 
Regarding John Fox, doctors hope tests will rule out there's nothing heart-related; numerous possibilities for lightheadedness.
— Chris Mortensen (@mortreport) November 2, 2013