Red Sox promote top prospect Marcelo Mayer to Double-A Portland
promotions – Blogging the Red Sox
MLB Draft 2021: A scouting report on Boston Red Sox pick Marcelo Mayer - Over the Monster
First-round pick Marcelo Mayer signs with Red Sox, gets a Fenway welcome - The Boston Globe
Marcelo Mayer, the Red Sox' top prospect, already looks destined for the big leagues - The Boston Globe
The Boston Red Sox are promoting Marcelo Mayer to the Greenville Drive. Congratulations Marcelo!
SoxProspects News: 2021
Red Sox promote top prospects Marcelo Mayer, Blaze Jordan to High-A Greenville – NBC Sports Boston
How Marcelo Mayer became a scouting impossible dream come true - The Boston Globe