Guys on this thread need to lay-off Barney. He had a hell of a year by any defensive measure and had a much shakier middle infield partner defensively with Castro than BP has with Cozart.
BP will win another Gold Glove in his career. I'd bet on it. I can't argue that he deserved it more than Barney this year without homerism, though. This is much less of a snub than all that All Star nonsense as far as I'm concerned.
And no, I don't think this means BP is starting to decline defensively. It probably will come, but I haven't seen it yet.