Answer
Forrest Griffin was given his black belt in Brazilian Jiu-Jitsu by Robert Drysdale. Griffin is a mixed martial artist who has competed in the Ultimate Fighting Championship (UFC). He is a former UFC Light Heavyweight Champion and has also competed in the Heavyweight division. Drysdale is a Brazilian Jiu-Jitsu black belt under Rickson Gracie and has been teaching the sport for over 20 years.