Mayhem became most famous in a bloody battle with Canadian superstar Georges St. Pierre at UFC 52. He lost by unanimous decision but won much respect for battling through the whole fight.
He holds wins over tough competition such as Falaniko Vitale, Ronald Jhun, Egan Inoue, Denis Kang, and Robbie Lawler.
Mayhem has fought in a variety of organizations, most notably ICON Sport and the Ultimate Fighting Championship (UFC).
He primarily utilizes Brazilian Jiu-jitsu and Muay Thai.