Martinez will not pitch for Triple-A Round Rock on Sunday, as he could be used in a major league start Tuesday, Evan Grant of the Dallas Morning News reports.
Kyle Lohse is currently slated for that start but isn't guaranteed to make the turn in the rotation after allowing seven runs over 4.1 innings in his last start. Martinez is the other pitcher in consideration Tuesday, but the 25-year-old hasn't had much success in the majors himself this season, allowing 16 runs on 30 hits and 15 walks over 22.1 innings.