Okami got embarrassed in the last fight and he will get embarrassed again.
His defensive wrestling is much better than his offensive wrestling. It isn't good enough to be a decent wrestler with good sub defense to beat Andy.
Okami is far too tentative in his fighting style, he isn't going to be shooting in straight away like Sonnen. I think he'll allow Silva to find his rhythm and get picked apart.
He does have a chance, but I think it's quite a small one. His offensive wrestling isn't quite good enough and he isn't aggressive enough to really put Andy in trouble.