Get ready for a no-holds-barred tournament that brings together athletes skilled in karate, jiu-jitsu, kickboxing, wrestling and other combat sports. The big brawl goes down at the MGM Grand Garden Arena in Las Vegas, with knockout main events featuring Rich Franklin squaring off against Nate Quarry, and Matt Hughes taking on Joe Riggs. Undercard matches include Georges St. Pierre battling Sean Sherk, and Nick Thompson vs. Keith Wisniewski.