The Boston Red Sox are promoting Marcelo Mayer to the Greenville Drive. Congratulations Marcelo!

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Boston Red Sox Promoting Top Prospect to Next Level - Fastball

Marcelo Mayer, the Red Sox' top prospect, already looks destined for the big leagues - The Boston Globe

Marcelo Mayer launches go-ahead home run for Red Sox' High-A affiliate

triston casas – Page 6 – Blogging the Red Sox

Red Sox prospect Marcelo Mayer off to impressive start for Greenville Drive

Red Sox's Top Prospect Marcelo Mayer Promoted To High-A Greenville

SoxProspects News: 2021

A cluster of talent at Double A Portland bodes well for the Red Sox' future - The Boston Globe

Red Sox's Top Prospect Marcelo Mayer Promoted To High-A Greenville, Boston Red Sox, Boston, Salem

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

What Marcelo Mayer's promotion means for shortstop's future