 He won silver medals in the Sumo World Championships in 1992 and 1994, as well as a bronze medal in 1993.Two years later, after his appearance in Ultimate Fighting Championship, Yarbrough increased his previous weight by 282 lbs, reaching an excess of 828 lbs that awarded him the Guinness World Record for the heaviest living athlete.He quickly became the World Amateur Sumo Champion, leading him to be one of the most famous sumo wrestlers outside Japan.