Marcelo Mayer, top MLB Draft 2021 pick, may be the best Boston Red Sox prospect - Over the Monster
2021 MLB DRAFT SLEEPERS; Alex Mooney, Jaden Hill and more
2021 MLB Draft - Top 600 Prospects — Prospects Live
Marcelo Mayer 2021 Bowman Draft Sky Blue #BD-174 Price Guide - Sports Card Investor
Top Shortstop Prospects
Top prospects in 2024
2021 MLB Draft profile: SS Marcelo Mayer is the Tigers' top target - Bless You Boys
MLB Mock Draft 2021: Jack Leiter lands with Rangers; 7 high schoolers projected for first 10 picks
2021 MLB Draft - Top 600 Prospects — Prospects Live
2021 MLB Draft - Top 600 Prospects — Prospects Live
Top Shortstop Prospects
Marcelo Mayer SS Scouting Report: 2021 MLB Draft • Prospects Worldwide
The Boston Red Sox select Marcelo Mayer with the 4th overall pick in the 2021 MLB Draft - MLB Daily Dish