Carpenter (shoulder) is scheduled to throw to bases Tuesday at Triple-A Toledo, Jason Beck of MLB.com reports.
Carpenter headed out on a minor-league rehab assignment in late May, but he's only served as a designated hitter so far and Beck speculates that the Tigers are unlikely to activate him until he's able to play the outfield. The 25-year-old landed on the injured list in late April because of a right shoulder strain.