Marcelo Mayer among five Red Sox prospects on Baseball America top 100 - Over the Monster
Red Sox shut down top prospect Mayer, Red Sox
2021 MLB Draft profile: SS Marcelo Mayer is the Tigers' top target - Bless You Boys
Mr. Baseball 2021: Marcelo Mayer
Red Sox top prospect Marcelo Mayer takes liftoff amid struggles
Top Red Sox prospect Marcelo Mayer promoted to Double A after blistering May - The Athletic
2021 MLB Draft Scouting Report: SS Marcelo Mayer - Lookout Landing
Marcelo Mayer, Red Sox top prospect, is tearing up the minor leagues
Red Sox Prospect Marcelo Mayer Has a Simple Approach and a High Ceiling
Red Sox top prospect Marcelo Mayer promoted to Double-A - CBS Boston