David Jacobs, commonly referred to as "The Rock", was a Brazilian jiu-jitsu black belt under Mario Yamasaki, who also worked extensively with Francisco Neto. Widely recognized as a pioneering figure of this sport/martial art in the East Coast of the United States, Jacobs was an avid competitor on the Grapplers Quest and IBJJF circuits during the 2000s era whilst also becoming one of the very first North Americans to referee for the IBJJF. During this period he also co-founded / founded two of the most successful BJJ academies on the state of Virginia: Fairfax Jiu Jitsu and David Jacobs Jiu-Jitsu Team.