In both a street fight and an MMA fight. These guys are 6'3+, 240 lb+ monsters. Most of them have no actual fighting skill, but they are athletic enough where all they need is that insane size advantage. Could any human take a clean shot from someone athletic and more that twice their size? Could any human stand a realistic chance in grappling? I don't think so. We are not talking Weidman VS LeBron where both guys are huge and Weidman has enough strength and skill where LeBron's pure size advantage wouldn't mean much. We are talking a relatively small man, vs some of the biggest monsters on earth.