Joshua Lawrence Barnett (born November 10, 1977) is an American mixed martial artist, submission wrestler, professional wrestler, and color commentator. 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.
Barnett is one of the most prominent modern-day catch wrestlers. He won an IBJJF no-gi jiu-jitsu world championship in 2009 - despite no formal jiu-jitsu training, the Metamoris Heavyweight Championship in 2014, and a Snake Pit Catch Wrestling World Championship in 2018.