Watched UFC 3 again last night. It reinforced a lot of this. Gracie and Shamrock were easily the best fighters in that competition, and Shamrock was pretty moden. Both suffered serious enough injuries / exhaustion that they couldn't continue. As did Keith Hackney, despite beating Yarbrough. So three quarters of the WINNERS in their brackets couldn't continue on in the tournament. That's a lot of attrition. Christophe Leininger was a good judoka; ranked second in the US at the time. Shamrock just tossed him on the ground, pressed him against the fence , and beat on him. Leininger couldn't pull off any submissions, and his ground striking seemed a little ad hoc compared to Gracie. Leininger, even if competing today in his prime, would likely beat 99% of internet people in a grappling match. Two alternates competed in that tournament, and both of them showed the advantages of being fresh. Again, that's what a hypothetical time machined competitor would have to face. One of them also showed tenacious and effective takedown defense against Shamrock. Kimo knew some ground grappling by the time he faced Royce. Not enough, but more than nothing. He was very difficult to take down, and did a real number in Royce when they were both fresh. Roland Payne was also more experienced than a lot of "well rounded" amateurs today. Wrestling background plus full contact muay thai competition. He got poleaxed by a hybrid sport jj (point karate + sorta-judo) guy.