Marcelo Mayer - Wikipedia
High school baseball: Top 10 MLB Draft prospects
2021 MLB Draft: Mock Draft 3.0 - Baseball Prospect Journal
2021 MLB Draft - Top 500 Prospects — Prospects Live
Eastlake's Marcelo Mayer: The Six Million Dollar Man
2021 MLB Draft Big Board, Updated: Keith Law ranks the Top 101 draft prospects - The Athletic
Top Four High School Shortstops Could Make MLB Draft History In 2021 — College Baseball, MLB Draft, Prospects - Baseball America
Red Sox prospect Marcelo Mayer hits first homer of season for Greenville Drive
Red Sox shut down top prospect Marcelo Mayer due to shoulder injury – NBC Sports Boston
Pittsburgh Pirates draft Louisville catcher Henry Davis with No. 1 pick; Jack Leiter goes to Texas Rangers at No. 2 - ESPN
Red Sox prospect Marcelo Mayer hits first homer of season for Greenville Drive
Meet Marcelo Mayer, Eastlake grad and MLB prospect with 'more pop' than Adrián González