Castillo's contract was a mistake. (The length of it, anyway. It would have been okay if it was a one- or two-year deal, I think.) Compounding that mistake by not looking at alternatives would be wrong. (And not at all out of character for the Mets.) It's refreshing to see them looking at alternatives even though Castillo has three years to go. If Murphy steals his job, Castillo can either be an expensive backup, or he can be traded. I don't know that the Mets would get much for him. The more cash they include the more they'd get back in talent, but trading him is a possibility.