Answer
Dominique Wilkins won the NBA Slam Dunk Contest twice, in 1985 and 1990. He is one of the most successful dunkers in NBA history, and his performances in the Slam Dunk Contest are considered some of the best in the competition's history. In 1985, Wilkins won the contest by dunking over seven-foot-two center Patrick Ewing. In 1990, he won the contest by dunking over a chair.