Answer
On November 18, 2012, Barnett faced Ryron Gracie in the finals of Metamoris 4. Barnett was the underdog in the match, as Gracie is a third-degree black belt in Brazilian jiu-jitsu and a member of the Gracie family. However, Barnett used his superior size and strength to control Gracie on the ground and eventually submit him with an armbar. With this victory, Barnett became the Metamoris Heavyweight Champion.