Stewart (knee) had an MRI done Wednesday which revealed "wear and tear" that could potentially require surgery, Adam Berry of MLB.com reports.
Stewart was placed on 15-day DL Monday with hopes of returning shortly after the All-Star break. While his MRI revealed that his knee may require surgery, Stewart remains optimistic he can play through the injury. He had struggled in his five games prior to being placed on the DL, going just 2-for-15 from the plate. Expect an update when the club decides how to handle the situation.