I think everyone agrees that you don't trade Perk to trade him. You do it for supreme talent, and at positions of need. This is reason 1 why I don't like Castellanos. While he's a top 20 prospect, he fits into an area where the Twins already have a glut of players... and to add to it, Detroit's system sucks outside of him, so no help at pitching or the middle infield worth bragging about. The most likely trading partners are Arizona and Boston, as both have needs there and have the guys that match up. Levi already mentioned Owings, Bradly, and Skaggs. AZ might be desperate enough to part with one of those guys. In Boston, there's Bogarts, Marerro, Barnes, Raunado, and Webster. All of them fit nicely into the Twins needs too.