MLB Draft 2021: Red Sox select prep shortstop Marcelo Mayer with No. 4 pick
Marcelo Mayer among five Red Sox prospects on Baseball America top 100 - Over the Monster
Marcelo Mayer Stats, Fantasy & News
Marcelo Mayer already crown jewel of Red Sox farm system, Sports
Boston Red Sox Top Prospect Voting: Marcelo Mayer is the next big thing - Over the Monster
Where are the Top Class of 2021 Prospects Now? - ITG Next
Red Sox prospect Marcelo Mayer's custom cleats at Futures Game - ESPN
MARCELO MAYER/McDONOUGH 2021 BOWMAN CHROME DRAFT FRANCHISE FUTURES RED SOX #FF-4
Marcelo Mayer 2021 Bowman Draft Chrome DP Auto - Refractor #CDA-MM Price Guide - Sports Card Investor
5 things to know about Red Sox shortstop Marcelo Mayer
Who is Marcelo Mayer? Boston Red Sox pick is five-tool shortstop from California, widely considered top overall player in draft class
Red Sox prospect Marcelo Mayer out for rest of 2023
Marcelo Mayer 2021 MLB Draft Profile - Last Word On Baseball
2021 MLB Draft profile: SS Marcelo Mayer is the Tigers' top target - Bless You Boys