Mock MLB Draft 2021 May 5
Marcelo Mayer wasn't supposed to be there for the Red Sox at No. 4
Jordan Lawlar SS Scouting Report: 2021 MLB Draft • Prospects
MLB Mock Draft - 2021 Amateur Draft - Top Prospect Rankings
B/R's 2021 MLB Mock Draft 1.0 for Every 1st-Round Pick
Red Sox prospect guide: Marcelo Mayer
Top 2021 MLB Draft prospects
2021 MLB Draft Scouting Report: SS Marcelo Mayer - Lookout Landing
Boston Red Sox Top Prospect Voting: Marcelo Mayer is the next big
Scouting Reports Archives • Prospects Worldwide
Marcelo Mayer Headed for 2021 MLB Draft - ITG Next
MLB Mock Draft 2021: Red Sox get Vandy's Jack Leiter at No. 4
MLB Player Comparisons for Top 2021 Draft Prospects
MLB Draft 2021: Marcelo Mayer and Five Other Prospects to Watch