Martin (elbow) is scheduled to throw a bullpen session Wednesday, Rob Bradford of WEEI.com reports.
Martin has been on the injured list since July 5 with right elbow inflammation, but he's set to advance to the final phase of his recovery program if his upcoming bullpen session goes well. Assuming he escapes the workout no worse for the wear, Martin could begin a rehab assignment as soon as this weekend. Martin owns a 3.42 ERA, 1.03 WHIP and 10 holds across 26.1 innings this season.