The Red Sox Prospects Report - Part Two - Over the Monster
Marcelo Mayer, the Red Sox' top prospect, already looks destined for the big leagues - The Boston Globe
2021 MLB Draft Scouting Report: SS Marcelo Mayer - Lookout Landing
marcelo mayer – Blogging the Red Sox
Here's where MLB ranks the top Red Sox prospects
Mayer, Leiter, Rocker among top prospects for MLB draft
Updated Top 100 MLB Prospect List: Where Dylan Crews, Other Top 2023 Draft Picks Rank, News, Scores, Highlights, Stats, and Rumors
The 2023 Top 100 Midseason Prospects — Prospects Live
Boston Red Sox's Marcelo Mayer ranked No. 9 prospect on MLB Pipeline's Top 100 list; Triston Casas No. 18, Jarren Duran No. 26