I wouldn't say he has NO CHIN. He got hit so many times in that fight against Clay-Bey that I was cringing.
On the other hand, he got knocked out by Fres Oquendo, and went down twice against Botha I don't know how hard Clay-Bey can really hit, but he does have a lot of knockouts. Of course, Tyson can certainly out punch those guys.
Who knows what kind of problems getting that "ink" hit could cause Tyson. +500 might be worth a shot here.