Against the Yankees, prospect Marcelo Mayer offers another glimpse at the future - The Athletic
Red Sox first-round draft pick Marcelo Mayer wants to sign 'as soon as possible' - The Boston Globe
2021 MLB Draft - Top 500 Prospects — Prospects Live
Marcelo Mayer, Boston Red Sox 2021 first-round pick, walks three times in professional debut in FCL
MLB Draft Top 500 Prospects. With the MLB Draft only a few days away…, by Tieran Alexander
Detroit Tigers could pick these players No. 3 overall in MLB draft
Four Red Sox minor-leaguers among Baseball America's Top 100 prospects rankings - The Boston Globe
2021 MLB Draft: Mock Draft 3.0 - Baseball Prospect Journal
What Experts Are Saying About Red Sox Draft Pick Marcelo Mayer - CBS Boston
2021 MLB Draft: Red Sox first-round pick Marcelo Mayer quickly ditches Yankees allegiance
Eastlake's Marcelo Mayer: The Six Million Dollar Man
Red Sox prospect Marcelo Mayer hits first homer of season for Greenville Drive
2021 MLB Draft — MLB Draft — Prospects Live
2021 MLB Draft Board. The MLB Draft is swiftly approaching…, by Tieran Alexander
Red Sox prospect Marcelo Mayer out for rest of 2023