Frank Shamrock is an MMA legend and considered by many to be the prototype for the modern mixed martial artist. He has earned titles in the UFC, WEC, andStrikeforce promotions. Outside of the ring, Shamrock is an MMA color commentator on CBS, Showtime, and ESPN2. Also internationally known as one of the world's top martial arts instructors and trainers, Shamrock is the highest-ranking instructor of the Submission Fighting style of martial arts in the United States.