His ability to throw out runners outweighs his inability to keep balls in front of him. does uzr or anything make any effort to differentiate between wild pitches that might have been blocked by a better catcher? i'm sure castillo is being penalized for passed balls, but how much do these systems know that he's not blocking as many balls as he might? i am generally wary of advanced defensive metrics when it comes to catchers and first baseman, as so much of their value comes excusing the mistakes of others. if things have improved in these areas, i'd be thrilled to hear about it. i won't pretend to be particularly up on things these days.