I think his chin will be proved to be decent. Randy rocked Sylvia with some similar shots that he put on Brock. I wouldn't say that Randy is the best boxer, but he did box during his military career. I think that he hit Brock with enough to show that Lesnar can take one on the button. Now can he take a shot from Fedor or someone else along those lines we will have to wait and see, but I think Brock could take shots from Mir, Herring, Nog, Kongo and a few others. It is when he gets into the boxer HW's he might need to tuck that chin a little more! Arlovski might be able to check his chin?