Wroten is the only one I know of that could be close to a first rd pick, I never considered him a 1st rd player. Wroten was busted a few months ago for having weed in his car and now has failed a drug test.
Interesting...however, I read that the two players that failed drug tests where Claude Wroten from LSU (some think he has 1st round talent) and John Scifres, a kicker from Missouri State (some consider him the 2nd best kicker). I don't know if those are the two he's talking about, but those are two guys that have reportedly failed drug tests. For Wroten, it wouldn't be his first time.
The guy with first round talent is Wroten, he was a definite first rounder before he was arrested for having drugs on him. Then this hurts him badly, but at the same time most NFL teams know about it, because he has been on a PR tour, ala Luis Castillo last year.