Smith (forearm) will be checked out by a doctor in New York on Monday for a second opinion, the Boston Globe reports.
Smith said the pain he's feeling now is "very similar" to what he felt in spring training, when he was shut down with a strained right flexor muscle. He noted some discomfort in his delivery, particularly his slider. After working his way back from the initial soreness, Smith was activated in early May, but has been unable to pitch on consecutive days and has needed multiple days to recover before being used again.