MLB Draft 2021: Marcelo Mayer and Five Other Prospects to Watch - The New York Times

Boston Red Sox draft Marcelo Mayer with fourth overall pick; SS was considered a candidate to go No. 1 overall

Red Sox prospect Marcelo Mayer off to impressive start for Greenville Drive

MLB Draft 2021: Marcelo Mayer and Five Other Prospects to Watch - The New York Times

Carlos Collazo 2021 MLB Draft Prospects Chat (Subscriber Exclusive) — College Baseball, MLB Draft, Prospects - Baseball America

Red Sox top prospect Marcelo Mayer has arrived in Portland

2021 MLB Draft Big Board, Updated: Keith Law ranks the Top 101 draft prospects - The Athletic

2021 Bowman Draft Baseball #BD-174 Marcelo Mayer Pre-Rookie Card - 1st Bowman Card : Collectibles & Fine Art

MLB Draft: Five from state on 1st night

Red Sox Prospect Outlook: Marcelo Mayer Destined For Stardom?

Top Four High School Shortstops Could Make MLB Draft History In 2021 — College Baseball, MLB Draft, Prospects - Baseball America

Red Sox prospect Marcelo Mayer hits first homer of season for Greenville Drive

MLB Draft: Top 500