Marcelo Mayer among five Red Sox prospects on Baseball America top 100 - Over the Monster
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Mayer, Yoshida headline 5 Red Sox prospects on BA's top 100 list
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Marcelo Mayer (SS), Top Prospects for the Boston Red Sox Has Just Been Promoted From High A to Double A : r/baseball
Minor Notes: Bello shines in Worcester debut, Mayer placed on injured list - SoxProspects News
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MLB - Shortstop is deep with elite prospects. 👀