Sullinger and T-Jones both hurt their draft stocks by coming back, not sure how that can be debated.. Both had disappointing sophomore seasons, the book was out on Sullinger this season in the big 10, play physical with him in the post and try to knock him off the block and he'll struggle.. He did, but some teams (like Michigan for example) didn't have the bigs to body him..
Anyway, the point is they weren't knocked down draft boards because this draft is so much sicker bro ! They were knocked down because NBA people realized they weren't as good as they thought they were once they got more exposure..