This situation with Upshaw is difficult. Like others have said, if he had no personal problems, and had a trouble free college career, he would be a top ten pick. But also, if he had a trouble free college career, there would have been many more big games and big tests to base your opinion on about him.
IMO he will be there at 16, but not 28. So I guess it depends on who is left at 16. (If Turner or WCS are there at 16, I say grab one of them, but I doubt they will be.
The fact is, at #16, we're not talking a about a franchise changer in this draft. Plus, we have a ton of draft picks in the next 2,3 years, and money to spend in free agency this year.
One thing for sure, the number one need for the Celtics is a strong, long, defensive minded center. He could be that guy if his head were screwed on right.
Worst case scenario...he never plays an NBA game, and we loose him in a few years. Money wise it would be a small loss, he would be on a rookie contract.
...If he interviews well, and shows well in the 5 on 5 games,
go for it, his possible up side is just too high.