Fabricio Werdum is a 2nd degree black belt in Brazilian Jiu Jitsu. He is a 2x IBJJF black belt world champion and also a 2x ADCC world champion making him one of the most accomplished Jiu Jitsu fighters in the UFC.
Notable Submission Wins:
Cain Velasquez via Guillotine Choke
Antonio Rodrigo Nogueira via Armbar
Fedor Emelianenko via Triangle Armbar
Alistair Overeem via Kimura