Detailing athletes such as Brock Lesnar and Bobby Lashley, this guide covers those who have divided themselves between bouts on the professional wrestling circuit and legitimate confrontations. From catch wrestling masters Ad Santel and Billy Robinson to the Japanese professional wrestler who gave birth to the global phenomenon that is modern mixed martial arts (MMA), this investigation travels from the shadowy carnival tent and the dingy training hall to the bright lights of the squared circle and the Las Vegas glitz of the octagon. Stu Hart's infamous Calgary Dungeon, Billy Riley's legendary Wigan Snake Pit, and the rigorous UWF Dojo in Tokyo are all explored, revealing the secret history of both professional wrestling and the rising sport of MMA. Squared circle icons Stranger Lewis and Lou Thesz and Olympic heroes Danny Hodge and Kurt Angle are also featured.