Michael Pineda’s rehab will take longer than initially anticipated, as the Yankees right-hander is continuing to feel discomfort in a muscle behind his right shoulder. Manager Joe Girardi said that Pineda reported an issue after playing catch on Friday. An MRI revealed inflammation near the teres major muscle in his upper back, prompting the Yankees to scratch him from a scheduled intrasquad outing in Tampa, Fla. “He’s got some inflammation still in that area, and he’ll be shut down for a little bit of time here and then we’ll try to get him going again,” Girardi said. “It’s not the news we wanted, but it’s what we’re dealing with.”