Martinez (elbow) was throwing from 220 feet Friday, but felt a little sore after the workout as he remains on the disabled list, Tony Paul of DetroitNews.com reports.
There was the slight chance that Martinez could play in the outfield for Triple-A Toledo's game on Friday, but the team isn't taking any chances and will keep him in the DH spot for now. Manager Brad Ausmus said that he could return before the end of the team's homestand, which continues through August 7. Chances are that he will be back before then, and could be back in the lineup as a right fielder within the next couple days.