Herb Dean, as well as a handful of fighters from the American Ju-Jitsu system (not Jake Shields, the way older version) are Black Belts from this system taught by Steve Crawford. I as well.
It was derived from Japanese JJ and not from Brazilian JJ. Although it uses aspects of BJJ, Catch-Wrestling, American Wrestling, Kenpo, and Judo.
UFC guys would be
-Curtis Stout
-Rob Kimmons
-James Krause
thats just to name a few, there are more from this system and a bunch that have fought in Belltator and other big orgs also.