Tim Sylvia was a legendary Mixed Martial Arts (MMA) fighter who rose to the top of the sport in the early 2000s. He won the UFC Heavyweight Championship twice and was one of the most successful fighters in the sport's history.
From Wikipedia
Timothy Deane Sylvia is an American retired mixed martial arts (MMA) fighter, professional wrestler, and a former two-time UFC Heavyweight Champion. He has competed as a Super Heavyweight and Heavyweight. While he is best known for competing in the UFC, Sylvia has also fought for Affliction, the International Fighting Championships (IFC), and ONE FC.