Denver Broncos coach John Fox returned to work today following aortic valve surgery on his heart on Nov. 4.

"I'm actually in better shape now than I was a month ago," Fox said. "I feel tremendous. As my surgeon said, I had a valve that was about as big as a pinhead, and now it's about the size of a 50-cent piece. I feel tremendous, obviously the doctors feel good about me getting back to work. I actually would have preferred to have been back sooner, but there was a pretty hard deadline after the surgery of four weeks, and I honored that.

"I feel as healthy as I've ever felt in the last 20 years. I'm going to be smart. If all of a sudden I can't hold my eyes open, I'm going to go home. But, like I said, the last three weeks I've been operating pretty much as I did the first eight weeks of the season. It's not like I'm moving furniture or doing roofs. I mean, I sit somewhere and watch football. ... [But] the procedure I had; I'm well."

Fox had the procedure, which he wanted to delay until after the season, after dealing with dizziness during a round of golf in North Carolina. He had surgery two days later.

Interim coach Jack Del Rio won three of four games with Fox sidelined.

"Great job by Jack and the staff and everybody in this building, to be honest with you," Fox said. "A lot of people's roles had to adjust some to pick up for my absence."

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Aaron Wilson covers the Ravens for The Baltimore Sun.