I remember reading online somewhere that when the Gracies started the ufc thing back in 1992 they requested that there are NO Judo guys allowed to enter the competition. I myself believe this to be true. A good majority of the brazillian subs came from judo so it makes sense that they would not want to fight them as they have knowledge of the moves and would school them seeings that the gracie family seems have missed the natural physical gifts.