Marcelo Mayer already crown jewel of Red Sox farm system, Sports
Hit bombs': Watch Red Sox draftee Marcelo Mayer meet Xander Bogaerts
Red Sox' Marcelo Mayer vaults into top five on MLB's Top 100 Prospects list – NBC Sports Boston
2021 MLB Mock Draft 6.0: Jack Leiter, Marcelo Mayer Among Key Pieces At The Top — College Baseball, MLB Draft, Prospects - Baseball America
Red Sox sign first-round pick Marcelo Mayer and glimpse their future - The Athletic
Marcelo Mayer #1 Red Sox Prospect (2022 Highlights)
MLB Mock Draft 2021: Boston Red Sox select Marcelo Mayer - Over the Monster
First-round pick Marcelo Mayer signs with Red Sox, gets a Fenway welcome - The Boston Globe
Top Red Sox pick Marcelo Mayer homers in second straight
MARCELO MAYER 2021 BOWMAN DRAFT (TOPPS) 1ST GRADED 10 ROOKIE CARD BOSTON RED SOX
Boston Red Sox's Marcelo Mayer ranked No. 9 prospect on MLB Pipeline's Top 100 list; Triston Casas No. 18, Jarren Duran No. 26