Garnett, Wilcox, Sullinger, Bass, Melo, Collins... that's 6 players that can play center. There are only so many roster spots if we want depth anywhere else.
In a perfect world maybe one more of those guys is a "true" center, but adding a 7th doesn't make sense to me considering what is out there. Garnett can defend the 5, Wilcox creates some mismatches, and Sullinger/Bass/Collins can all defend the post depending on matchups. Melo could be useful by the end of the year for stretches.
Perfect, no, but half of our roster is committed to the 4/5 spots and I think that's enough.