Nick Diaz is an American mixed martial artist from Stockton, Californa. He is the former Strikeforce, WEC and IFC Welterweight Champion. He has also competed in the Pride Fighting Championships, Elite XC and currently fights under the UFC (Ultimate Fighting Championships). Diaz was promoted to black belt in Brazilian Jiu-Jitsu by Cesar Gracie on May 8, 2007. Diaz trains at the Cesar Gracie Jiu-Jitsu Academy in Pleasant Hill, Jake Shields Gracie fighter Academy in Berkeley, Gilbert Melendez’ El Nino Training Center in San Francisco and is co-owner of Cesar Gracie Jiu Jitsu Lodi in Lodi, California. Training in Jiu Jitsu since: 1998 MMA Fighter since: 2001