Red Sox promoting No. 1 prospect Marcelo Mayer to Double-A
Red Sox promoting No. 1 prospect Marcelo Mayer to Double-A
Red Sox shut down top prospect Mayer, Red Sox
Red Sox's Top Prospect Marcelo Mayer Promoted To High-A Greenville
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Red Sox shut down top prospect Marcelo Mayer due to shoulder injury – NBC Sports Boston
Red Sox: 3 must-watch Boston prospects in Spring Training
How shortstop prospect Marcelo Mayer put himself on the fast track in the Red Sox system - The Boston Globe
Minor Notes: Mayer earns promotion to Portland - SoxProspects News
May Farm Report: Red Sox promote Shane Drohan, Marcelo Mayer
Top Red Sox prospect and fastest rising prospect both homer for Portland
