Simple question. If you were building a team that can run around Rajon Rondo, what centers out there, free agent or not, available or not, young or not, fit with the concept? Let's add two constraints. One, the center has to have the length, height, or defensive skills so that you don't cringe if the Celtics play against a big, quality center with a strong post-up game. (I think that eliminated Chris Wilcox.) Two, the center has to have sufficient intelligence that you don't doubt his ability to understand the offensive and defensive playbook of Doc Rivers. (I think that eliminates Javale McGee.)
So, who fits that criteria? Who are bad fits? (Other than Jermaine O'Neal. There are other threads if you need to criticize him.)