Mariners general manager Jerry Dipoto said Wednesday that Ray (elbow) could return from the 15-day injured list around the middle of May, Jen Mueller of Root Sports Northwest reports.

Dipoto admitted that the mid-May return is just a guess rather than a firm target for Ray, who has yet to resume a throwing program since sustaining a left flexor strain in his season debut March 31. The left-hander will need to complete several bullpen sessions and make at least a couple of rehab starts before he's deemed ready to rejoin the Seattle rotation.