Severino was placed on the 7-day DL Tuesday with a blister on his right middle finger, MLB.com's Matt Kardos reports. He was forced to exit his last start Sunday after just two innings due to the blister. Severino is the Yankees' top pitching prospect, and a top-50 overall prospect in dynasty leagues. Fortunately the injury sounds minor and he should be back on the mound in the relatively near future.