Jamaican-Canadian boxer who was the WBC heavyweight champion in 1986 and is known as the last man to fight Muhammad Ali, and one of the small number to win.
When he was 21 he competed in the 1976 Summer Olympics as a heavyweight boxer, although he had previously only competed at the amateur level.
His nephew and an accomplice were convicted for his murder in 1986. He was survived by his seven children.
He had a very public feud with Larry Holmes, who he brawled with both in and out of the boxing ring.