Marcelo Mayer Baseball Trading Card Database
Red Sox's Marcelo Mayer On Pace To Become No. 1 Prospect In MLB Next Season - Sports Illustrated Inside The Red Sox
Top 100 Baseball Prospects
Marcelo Mayer 2022 Minor League Highlights
Red Sox's Marcelo Mayer On Pace To Become No. 1 Prospect In MLB Next Season - Sports Illustrated Inside The Red Sox
Boston Red Sox top prospects 2023: Marcelo Mayer leads list