NBC TODAY weather and feature anchor, Al Roker, returned to the set this week after having knee replacement surgery on October 11, 2016. This is the second knee Mr. Roker had replaced – having the first knee replaced after an auto accident 15 years ago. Mr. Roker appeared live on TODAY as he recovered from surgery and explained the years leading up to it, what the surgery involved and how quickly he was up and moving. His surgeon, AAHKS member, David J. Mayman, MD of the Hospital for Special Surgery in New York is also featured in the video. View the video.