<P> Roker is an Honorary member of the Phi Beta Sigma fraternity . </P> <P> On Thursday, June 7, 2001, Roker underwent a total knee arthoplasty (replacement, or "TKA") on his left knee . </P> <P> In 2002, Roker underwent gastric bypass surgery to lose weight, which he said he did after failing at numerous diets . Eight months after the surgery, the New York Daily News reported he had dropped 100 pounds (45 kg) from his 320 lb (150 kg) figure . In 2013, Roker made headlines after he admitted in a nationally televised interview that he had defecated in his pants during a visit to the White House, a side - effect of his gastric bypass surgery . Roker wrote about his battle with weight loss in Never Goin' Back: Winning the Weight Loss Battle For Good, published in 2013 . </P> <P> In 2005, he had a back operation . He had another knee replacement surgery in 2016 . </P>

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