Marcelo Mayer drafted No. 4 by Red Sox in MLB Draft
MLB Draft 2021: See Who Tampa Bay Rays Picks
The Boston Red Sox select Marcelo Mayer with the 4th overall pick in the 2021 MLB Draft - MLB Daily Dish
Boston Red Sox select Marcelo Mayer from Eastlake HS with the 4th pick of the 2021 MLB Draft
2021 MLB Draft: Red Sox select No. 1-ranked prospect Mayer, Local Sports
Marcelo Mayer wasn't supposed to be there for the Red Sox at No. 4, but the MLB Draft had other plans - The Boston Globe
MLB Draft 2021: Marcelo Mayer is a potential pick for the Boston Red Sox - Over the Monster
Where Red Sox prospects rank in recent top prospect lists
MLB Draft 2021: A scouting report on Boston Red Sox pick Marcelo Mayer - Over the Monster
Four Red Sox minor-leaguers among Baseball America's Top 100 prospects rankings - The Boston Globe
2023 MLB Draft: The Top 500 Prospects - Future Stars Series
2021 MLB Draft: Red Sox first-round pick Marcelo Mayer quickly ditches Yankees allegiance
Red Sox top prospect Marcelo Mayer has arrived in Portland