The term 'Boxing Legend' refers to three famous boxers: Muhammad Ali (3 letters), Mike Tyson (10 letters), and Sugar Ray Leonard (15 letters). Muhammad Ali was an American professional boxer, activist, and philanthropist who is widely regarded as one of the most significant and celebrated sports figures of the 20th century. Mike Tyson is an American former professional boxer who was the undisputed world heavyweight champion and holds the record as the youngest boxer to win a heavyweight title at 20 years, 4 months, and 22 days old. Sugar Ray Leonard is an American former professional boxer, motivational speaker, and occasional actor who was named 'Boxer of the Decade' in the 1980s.