American boxer who became the first USBA Heavyweight Champion and held the WBA World Heavyweight title from March 1980 to December 1982.
He served in the United States Marine Corps from 1968 to 1971 and fought in the Vietnam War. It was during this time that he began training as a boxer.
His Round 15 knockout of John Tate in March 1980, which came with just 45 seconds left in the fight, is considered one of the greatest knockouts in Heavyweight history.
He has two daughters and a son.
He defeated Carl Williams via technical knockout in February 1986.