He hasn't suffered much for prolonged beatings is where he's fortunate. Frank isn't an attrition stylist, he's either going for the throat himself with his crazy finishing power, or his opponents land something on him and often in either scenario the fight is ending. So yeah, he's eaten some finishes. But he's never had a prolonged brain scrambling like hunt received against Stipe. Or gone punch for punch for 5 rounds in like a lawler vs rory type fight. Those are the fights that really plague a fighters prolonged life where guys are just too tough for their own good.