Am I missing something? Right now, our bigs consist of KG, Wilcox, Sullinger, Fab Melo and Jason Collins. Call me crazy, but that just isn't very good depth at the center position.
Well, you _are_ missing something.
For one, you're either talking about "centers" or about "bigs".
If talking about _centers only_, having 5 people that can play the position (the ones you listed) is more than plenty.
If talking about _bigs_, then you need to add Bass to the equation, as well as acknowledge that Green and even Pierce can play the position part-time. Also plenty.
Both of these are true even if Melo gets most of his reps in the D-League.
That's why we haven't, and we won't, sign another center this season, unless an injury happens, or a can't-pass guy somehow becomes available (and no, Chris Andersen is not it).