MLB Draft 2021: Marcelo Mayer and Five Other Prospects to Watch - The New York Times
Present and future collide as Xander Bogaerts eagerly welcomes Red Sox' top draft pick Marcelo Mayer - The Boston Globe
Red Sox first-round draft pick Marcelo Mayer wants to sign 'as soon as possible' - The Boston Globe
A guide to the Pirates' possible selections with No. 1 draft pick, Pittsburgh Pirates
Marcelo Mayer already crown jewel of Red Sox farm system, Sports
Eastlake's Marcelo Mayer selected No. 4 overall by Boston Red Sox in 2021 MLB Draft - Sports Illustrated High School News, Analysis and More
2021 Bowman Draft Chrome Draft Pick Autographs Orange Refractor #CDA-MM Marcelo Mayer Signed Rookie Card (#22/25) – PSA GEM MT 10, PSA/DNA 10 – Pop 5 on Goldin Auctions
Red Sox: Marcelo Mayer's prospect ranking shows he was the right draft choice
2021 MLB Draft: Mock Draft 3.0 - Baseball Prospect Journal
Red Sox prospect Marcelo Mayer hits first homer of season for Greenville Drive
Red Sox Marcelo Mayer or Yankees Anthony Volpe
2021 MLB Draft Picks: Live Team-by-Team Grades and Analysis, News, Scores, Highlights, Stats, and Rumors
Red Sox top prospect Marcelo Mayer embracing stop with Sea Dogs