Nicknamed "Mad Dog", because of his intensity, White became a two-time Pro Bowldefensive end. White spent much of the week leading up to Super Bowl IX in a hospital, suffering from pneumonia; he lost 20 pounds and was not expected to play in the game. However, he did play, and accounted for the only scoring in the first half when he sackedFran Tarkenton in the end zone for a safety — the first points in Steelers' history in a championship game. The Steelers defeated the Minnesota Vikings 16–6.
White finished his career with 46 quarterback sacks, however sacks were not an official defensive stat until 1982.
Steelers owner Dan Rooney called White "one of the greatest players to ever wear a Steelers uniform" and he was named to the Steelers All-Time team in 1982 and again in 2007. He retired after the 1980 season and went on to become a stock broker.
Dwight White died of complications that arose from an earlier surgery. A blood clot in his lung, the complication from back surgery, is the suspected cause of death. On February 1, 2010, his family filed a wrongful death suit against the University of Pittsburgh Medical Center and three doctors, claiming that his death had been caused by medical negligence.