Miller is headed for the 15-day DL with a forearm injury, Wallace Matthews of ESPN New York reports. He did not warm up during the Yankees' 11-inning loss to the Nationals on Wednesday, and now the reason why has come to light. Manager Joe Girardi said it's an injury to the muscle in Miller's forearm that will land him on the DL, though he did not offer up any sort of timetable for the lefty's return. Dellin Betances is expected to serve as the closer for New York in the interim.