Al Roker, weather anchor on NBC's Today show, underwent a total knee revison on May 9, the news outlet reported May 10.
Mr. Roker's recent surgery was a revision of a left knee replacement that he had done 23 years ago. He had a previous right knee replacement surgery in 2016, according to Today.
Mr. Roker posted a video of himself walking down the hallways of a hospital on Instagram on May 10 with the caption, "Up and walking this morning on the #newknee #stepbystep thanks to @drdavidmayman. Wearing a negative pressure pump to help facilitate wound healing."
The physician tagged in Mr. Roker's post is David Mayman, MD, an orthopedic surgeon and co-director of computer assisted surgery at Hospital for Special Surgery in New York City.