Red Sox Select Marcelo Mayer With No. 4 Pick In 2021 MLB Draft
Boston Red Sox top prospect Marcelo Mayer belts first professional homer, drives in four runs in FCL game
Marcelo Mayer among five Red Sox prospects on Baseball America top 100 - Over the Monster
Red Sox promote top prospect Marcelo Mayer to Double-A Portland
2021 MLB Draft: Top 400 Prospects
Red Sox prospects Marcelo Mayer, Miguel Bleis impress in spring training
Marcelo Mayer could make MLB Draft history for Eastlake High - The San Diego Union-Tribune
5 things to know about Red Sox shortstop Marcelo Mayer
Red Sox top prospect Marcelo Mayer out with right wrist soreness - The Boston Globe
2021 Arizona Diamondbacks Draft Preview: Marcelo Mayer - AZ Snake Pit
2021 MLB Draft - Top 600 Prospects — Prospects Live