Marcelo Mayer is not the only Red Sox prospect turning heads up in Portland
Marcelo Mayer is the biggest Red Sox prospect to hit Portland in a decade. Catch him while you can. – The Portland Phoenix
Checking in with the Red Sox' top 10 prospects
MLB expert analysis of Red Sox draft pick Marcelo Mayer
THE FINAL MLB MOCK DRAFT 4.0
Red Sox Prospect Outlook: Marcelo Mayer Destined For Stardom?
Red Sox to promote top prospect Marcelo Mayer to Double-A Portland on Tuesday
Red Sox Top prospect Marcelo Mayer may get called-up to Boston
First-round pick Marcelo Mayer signs with Red Sox, gets a Fenway welcome - The Boston Globe
Red Sox have three prospects in Baseball America's 2021 Top 100 list