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A's Acquire Rosario; DFA Mitchell

Rosario pitched briefly for Miami this year.

The Oakland A's added another hard-throwing right-handed relief arm to their organization on Wednesday.

The Oakland A's added more depth to their relief corps on Wednesday, acquiring hard-throwing right-hander Sandy Rosario from the Boston Red Sox for cash considerations or a player to be named later. To make room for Rosario on the A's 40-man roster, Oakland has designated outfielder Jermaine Mitchell for assignment. Rosario joins the A's from Boston but he has spent his entire pitching career in...

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