Even with his extra weight he lacks the quickness to play any other position but PF or Center. He doesn't really belong at either spot but he can't even pretend to play small forward or guard.
Or you saying he's a bit on the chubby side? Too many late night burritos?
He works as a stabilizer to slow things down and spread the floor. I agree 15 minutes is too much. Depends on what our active roster looks like come winter. I hope he mainly waves towels while our young core racks up the Ws.