Zimmermann (ankle) was activated from the 60-day injured list ahead of his scheduled start Tuesday against the Red Sox.

The club announced over the weekend that Zimmermann would return from a three-month absence to start Tuesday, and now he's officially been added back to the 28-man and 40-man rosters. The southpaw built up to four innings in his latest rehab outing with Triple-A Norfolk last Thursday, so he should have a chance to qualify for a win if he can be efficient.

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