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Josh Barnett is a professional mixed martial artist who has competed in the Ultimate Fighting Championship (UFC), Strikeforce, and Bellator. He is a former UFC Heavyweight Champion and has also won the World No-Gi Jiu-Jitsu Black Belt Championship. In 2009, Barnett won the World No-Gi Jiu-Jitsu Black Belt Championship by defeating Braulio Estima in the final.