You're over thinking this.
He'd be the fourth center, behind Duncan, Splitter and Pendergraph. Again, if one of Duncan or Splitter are out, he'd have an opportunity to play. But even then, presuming Diaw, Bonner and Pendergraph aren't, he'd still probably be the fifth big. I'm sure they'd want to take a look at him in that scenario though, especially if they're matched up against a Howard, Bynum, Lopez, Hibbert, Pekovic, etc. That's enough to let him get his feet wet again, but it's far from "relying" on him.