After watching UFC 100, the Rio De Janeiro Times reports that Rickson Gracie said he can beat both Fedor and Brock, with Lesnar being the easier guy to submit:
"The UFC champion is impressive as an athlete. But he has holes in his game like anybody else. Technically, he is not as good as Fedor. It would take me longer to submit Fedor than it would him
I am not worried about his abilities. Whether he punches at me on the ground or standing, it is only a matter of time. In some ways, it is easier if he tries to punch at me standing. All the simpler to take him down. It ends in an armbar or a strangle regardless."
Rickson Gracie is a 50 yearold 8th degree Brazilian Jiu Jitsu Black belt and is the older brother of UFC hall of famer, Royce Gracie. Sherdog has his MMA record at 11-0, but he claims to have fought around 400 matches while remaining undefeated. He hasn't fought since the year 2000, and has made claims in the past that Fedor has so-so technical skills and he is 100% sure that he'd submit him.
It is also interesting to note that the late Helio Gracie said that Rickson counts practices and amateur bouts in his 400-0 record, and that if Helio did that also, he'd probably have a million fights in his record.