Marcelo Mayer Class of 2021 - Player Profile
Marcelo Mayer Headed for 2021 MLB Draft - ITG Next
2023 Preseason Red Sox prospect rankings - by G.G.
Mayer, Leiter, Rocker among top prospects for MLB draft
Marcelo Mayer, the Red Sox' top prospect, already looks destined for the big leagues - The Boston Globe
Red Sox sluggers Blaze Jordan, Niko Kavadas among Boston prospects with potential for breakout seasons in 2022
2023 MLB Season Preview: American League
MLB The Show 21 CAP - SS Marcelo Mayer
2021 MLB Draft Results: Grades for Overall Team-by-Team Results, News, Scores, Highlights, Stats, and Rumors
Prospect Report: Red Sox's Mayer Caps a Great Week — College Baseball, MLB Draft, Prospects - Baseball America
Top 60 MLB prospects: Keith Law's updated rankings following the Juan Soto trade - The Athletic