The guy has never been even dazed from what i know so i think a Ko .lloss for him is highly doubtful,he has a sturdy chin and rolls well with punches
Can't be done. He has a terrific defense and top of that has a grade A chin. Most fighters have great difficulty landing clean punches let alone try to KO the guy.
If he is in the form he was in during the Pavlik fight then I can't imagine stopping him below cruiser.