Miranda started the year as a full-time regular and possible long-term piece for the Twins. A year ago at this time, I was saying that the Twins should trade Miranda in a package to get starting pitching. He promptly took off and made a case that he was a cornerstone of the franchise. I'll wait before I say again that he should be traded, but I don't think his future is at third base with the Twins, which does lessen his value. I've seen very little that makes me believe he'll even be more than passable at third base--the arm and the first step are lacking. He could yet be a middle of the order DH and first baseman, but right now he seems to be pressing and chasing too many pitches outside the zone.
Willi Castro is a classic utility player. He is a switch hitter, with some speed and pretty even platoon splits. He doesn't hit for much power, but he is very versatile. He seems to be Rocco's choice as the alternate at both third base and shortstop over Nick Gordon. When Farmer returns, the need for Willi's skills will be diminished. Today, I would send Castro to St. Paul in exchange for Farmer. If Miranda continues to struggle on either offense or defense, Willi can help this club as a utility guy while someone else steps in at third base.