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Doc, hes not Montero or Clement here. Hes actually caught in the big leagues for the vast majority of his innings. His CS is poor, but managable. His PBs are fine.
Game calling isn't measurable, so the question is, just how bad is it?
By calling Napoli a non-catcher you're saying his game-calling is more damaging 40 runs in a full season. I find that very difficult to believe.
Even in an extreme -20 runs scenario, hes better than any catcher we've had since Joh's first season. And call me skeptical, but theres no way his intagibles with cost him 20 runs.