He's been hit standing more than 4 times and he's only been rocked once. Jorge Rivera ripped into him with 5 or 6 massive hooks. Silva winked at him. Hendo landed flush on him. Did nothing. He's been hit plenty of times and only hurt once. After Chael hurt him he stood put his hands down and let him drill him 4 more times that did nothing.
Chael hurt him, Dan didnt land quite the "H-bomb", and I havent watched too much pre-UFC of any fighter.