Martin (shoulder) is scheduled to make a rehab appearance with Triple-A Worcester on Thursday, Alex Speier of The Boston Globe reports.
Martin, who was placed on the 15-day injured list April 16 with right shoulder inflammation, is expected to require just one rehab appearance before rejoining the big club as soon as this weekend. Prior to landing on the shelf, Martin had posted a 2.57 ERA and 1.29 WHIP while collecting three holds across seven innings.