9-12th, or so. Maybe pushing to 8th if lots are off, and he's really on. He won't look bad, but he's going to be smaller and older, and the Olympia's a young man's game, both physique wise and business wise. Legacy wise, if he even comes in half way decent, they won't dishonor him by putting less than lower double digits. And it make for a decent "feel good" story for a 50+ year old to do that well against the young bucks.
He picked a good Olympia to attempt this, the line up is weak, so there'll probably be some surprises.