Small Wrestler (128 lbs) vs Powerlifter (330 lbs) in a Grappling Match

In this match we can see a small guy, a wrestler, in a grappling match against a powerlifter who weights more than 300 lbs. We can see that wrestler is having a huge problems with anything he tries on a huge guy. What do you think how good would some BJJ practitioner do against a someone this size? Would submissions do any difference or not at all? Use code “FIRST15” for 15 OFF 150lb BJJ purple belt vs. MASSIVE 250lb bodybuilder BODYBUILDER Vs. JIU JITSU FIGHTER