I don't think he got kicked off any team. I'm not aware of anything like that. He said that he would come back for his junior year, and then changed his mind and declared for the draft. That pissed off a lot of UNLV fans, but I never heard about him being in that kind of trouble.
He was a little full of himself, and the rumors (whoever "they" are) said that there were doubts about his work ethic. But it was still pretty surprising that he didn't even get drafted. Probably the best thing that could have happened to him, because to his credit he figured out that it was going to be a lot harder to make it in the NBA than it was in college. Had he stayed at UNLV another year, I have no doubt that he would have gotten drafted - likely even somewhere in the first round. I still think he's a guy who could really improve inside the Spurs' system, and be good enough to play. If he had been on the team through SL and D-League, he might get pulled up while Gasol is out. But he wasn't, so it's really just trivial pursuit.
He is tall, though.