"[Martin] just has to pitch well and get on a roll. As we get some guys back, sometimes it gets a little bit crowded," Girardi said. "What I would tell him is to be ready. When the phone rings, you want to be the guy."
Martin, 28, pitched a perfect inning for the RailRiders in Saturday's 6-1 loss to Norfolk, inducing three groundouts. He was 0-1 with a 3.55 ERA in 15 appearances before being placed on the disabled list May 9 with right elbow tendinitis.
"At the end, it was a little bit of a struggle for him," Girardi said. "We'll see if we can get him back on a roll, and then if we need him, we'll call him."
Bryan Hoch is a reporter for MLB.com. Follow him on Twitter @bryanhoch, on Facebook and read his MLBlog, Bombers Beat. This story was not subject to the approval of Major League Baseball or its clubs.