Marcelo Mayer Has Been Promoted to AA Portland

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Red Sox Prospect Marcelo Mayer Fitting In Since Portland Promotion

Red Sox promote top prospect Marcelo Mayer to Double-A Portland

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Red Sox top prospect Marcelo Mayer takes liftoff amid struggles

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First-round pick Marcelo Mayer cherishes the moment at Fenway Park

Marcelo Mayer Has Been Promoted to AA Portland

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