Ralph Gracie

Nicknamed Pitbull for his insane style of always attacking, Ralph Gracie moved to the U.S. to teach BJJ in 1994 and, soon after, he wowed everyone with lightning-fast wins in the Extreme Fighting MMA organization. BJ Penn's first teacher, Ralph is a brother of Ryan and Renzo Gracie, and his academy in San Francisco, in northern California, is one of the world's most successful.