What if his apathy comes from playing against crappy players? Maybe he needs a challenge.
I don't think Shaq O'Neal was known for having a great work ethic. He didn't stay in shape consistently, really only developed a few offensive moves, didn't always apply himself on defense, and never really learned to shoot free-throws in his career. But he still won 4 rings and made the Finals two other times. His combination of size and natural athleticism was just unstoppable. Drummond looks to be physically dominant and has an awful lot of skill and natural talent. Even if he plays at half speed, he still looks like a potentially dominant go-to player. I don't think he's a big risk to whomever drafts him.