D'Arnaud is 27. That's not old, but it's old enough to think that he is what he is. He absolutely cannot stay healthy, and now there are legitimate questions about whether all the injuries have taken a toll on his hitting, and he has a noodle arm. The "upside" of him is nice, but it's hard to see him ever really fulfilling his potential. He needs to go to the AL and try his hand as a DH.