Amare played defense when Woodson took over. And I honestly think he'll play better defense as a center than pf. Another reason why he needs to come off the bench.
Last year was his first in a defensive system (every team doesn't really have a system with principles to rely on) They did in Phx, but it was a zone defense. With the training camp that Amare mostly did go through (even if he didn't play in preseason) I think he'll be better.