On the Clock with the 4th Pick Boston Red Sox 2021 MLB Draft
Boston Red Sox draft Marcelo Mayer with fourth overall pick; SS was considered a candidate to go No. 1 overall
The Boston Red Sox select Marcelo Mayer with the 4th overall pick in the 2021 MLB Draft - MLB Daily Dish
Four Red Sox minor-leaguers among Baseball America's Top 100 prospects rankings - The Boston Globe
Marcelo Mayer, Boston Red Sox 2021 first-round pick, walks three times in professional debut in FCL
Eastlake's Marcelo Mayer selected No. 4 overall by Boston Red Sox in 2021 MLB Draft - Sports Illustrated High School News, Analysis and More
MLB Mock Draft 2021: Boston Red Sox select Marcelo Mayer - Over the Monster
Drive's Mayer promoted to Double A
Stripes Lock in a Win to Even the Series at 17U NTDP
MLB Draft 2021 Day 1 picks: Pirates take Henry Davis, Jack Leiter goes to Rangers – NBC Sports Chicago
Marcelo Mayer, the Red Sox' top prospect, already looks destined for the big leagues - The Boston Globe
2023 Futures Game scouting reports