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Vierling (shoulder) began a hitting progression this week and was cleared Friday to advance his shoulder strengthening exercises, Evan Petzold of the Detroit Free Press reports.

The 28-year-old resumed light baseball activities in early March after being shut down due to a strained rotator cuff early in camp, and he's now ramping up his rehab work. Vierling will begin the season on the injured list but could make his season debut sometime in April.

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