Joshua Lawrence Barnett is an American mixed martial artist, submission wrestler, professional wrestler, and color commentator currently signed to Bellator MMA. Barnett previously competed for the Ultimate Fighting Championship (UFC), where he was the youngest-ever UFC Heavyweight Champion. Barnett was the final Openweight King Of Pancrase, a finalist in both the 2006 PRIDE Openweight Grand Prix and the 2012 Strikeforce Heavyweight Championship Grand Prix. He has also competed in Affliction, World Victory Road, DREAM and Impact FC.

Submission wrestling, also known as submission grappling, submission fighting or simply grappling, is a competitive martial art and combat sport that focuses on ground fighting and submission techniques. It is a hybrid discipline that incorporates elements of various grappling arts such as various wrestling styles, judo, and Brazilian jiu-jitsu. Submission wrestling is practiced both as a competitive sport and as a training method for self-defence and mixed martial arts (MMA).