Shamrock is widely regarded as one of the greatest mixed martial artists of all time, as well as one of the first complete mixed martial artists, adapting his game from a grounded style of fighting to a more complete, well-rounded, and versatile style that included always improving striking to go along with his skilled ground game.
He is the adopted brother of Ken Shamrock. An author, entrepreneur, philanthropist, and social activist, he also was a Color Commentator for Showtime Networks, Bellator MMA, Glory Kickboxing, and Combate Americas. Shamrock has been a brand spokesman for Strikeforce, VAS, UFC, and K-1 MMA and has advised on over 4.5 billion dollars in assets.