Yankees pitching prospect Jose Campos, considered one of the team's best young arms, was placed on the Minor League disabled list on Thursday. There is no official word out of Class A Charleston on how long Campos will be sidelined or the extent or nature of the injury, but it has been reported that he complained of elbow trouble after his last start and that an MRI was performed on his elbow. Campos was acquired along with Michael Pineda from the Mariners in a deal that shipped Jesus Montero to Seattle.