This is another nightmare scenario as far as I'm concerned. All the good PG/wing players off the board by 13 and we're left to choose from an interesting group of PF's, all of whom have significant ????'s.
I like Patterson better than Blair. I just don't think Blair will be able to defend at the NBA level. I'm interested in James Johnson, but not at 13.
I agree with Seth about Sam Young. He was the best player on Pitt, much more impressive than Blair in every single game I watched.
I like Pargo as a 2nd round PG prospect, a la Chalmers, though they have different offensive games. I think Pargo has the potential to be a Lindsey Hunter, Anthony Carter like defensive PG specialist who hangs around the league for a long time. That's a hell of 2nd round pick.
edit: I also don't see B.J. Mullens going this low in this draft. It might be en vogue to predict him to fall a la DeAndre Jordan, but he's got legitimate star potential. He'd have been a lottery pick in last year's draft, and the one year @ OSU only showed that he has a little bit farther to go than people thought, not that he has any less potential. If he's there this late in the first, he's definitely worth trying to trade back in to pick up, even though we've got Roy.