Weber is set to meet with a doctor in Toronto on Saturday to have his right shoulder examined, Greg Johns of MLB.com reports.
This adds to the concern surrounding Weber, who left Saturday's start in the fourth inning with what has been diagnosed as right shoulder tightness. The Mariners will send him to a specialist for further examination, at which point there should be more clarity on the severity of his injury. If he requires a DL stint, it'll be another blow to what is an already beleaguered Mariners pitching staff.