Mata's contract was purchased by the Red Sox on Friday.

One of Boston's top pitching prospects, Mata spent the summer at the alternate site, although he missed a couple weeks with a hamstring injury. He won't turn 22 until May but already has 11 starts at Double-A under his belt, so he could open the year at Triple-A. Mata has the potential to develop into a mid-rotation starter if he can throw enough strikes.

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