Red Sox top prospect Marcelo Mayer promoted to Double-A - CBS Boston

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Marcelo Mayer is the biggest Red Sox prospect to hit Portland in a decade. Catch him while you can. – The Portland Phoenix

Red Sox promote top prospect Marcelo Mayer to Double-A

Boston Red Sox promote prospect Marcelo Mayer to Double-A

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Red Sox shut down top prospect Marcelo Mayer due to shoulder injury – NBC Sports Boston

Red Sox shut down top prospect Mayer, Red Sox