How Marcelo Mayer became a scouting impossible dream come true - The Boston Globe
2021 MLB Draft Picks: Live Team-by-Team Grades and Analysis, News, Scores, Highlights, Stats, and Rumors
MLB draft: Analyzing every first-round pick - Sports Illustrated
Red Sox pick high school SS Marcelo Mayer fourth overall in 2021 MLB Draft
Marcelo Mayer of Eastlake High taken fourth in MLB Draft - The San Diego Union-Tribune
First-round pick Marcelo Mayer signs with Red Sox, gets a Fenway welcome - The Boston Globe
Marcelo Mayer, top MLB Draft 2021 pick, may be the best Boston Red Sox prospect - Over the Monster
2023 American League Futures Game Roster, Player-By-Player Analysis — College Baseball, MLB Draft, Prospects - Baseball America
MLB Draft 2021: A scouting report on Boston Red Sox pick Marcelo Mayer - Over the Monster