Marcelo Mayer, Boston Red Sox 2021 first-round pick, walks three times in professional debut in FCL
Top 200 Draft Prospects list: A new No. 1
2021 MLB draft tracker live updates - Results for all first-round picks, order, analysis and highlights - ESPN
Red Sox prospect Marcelo Mayer posts first multi-homer game of professional career - The Boston Globe
MLB Draft 2021: See Orioles Picks, Best Prospect In MD
Red Sox select HS shortstop with 4th overall pick in MLB draft
MLB Draft 2021: A scouting report on Boston Red Sox pick Marcelo Mayer - Over the Monster
Red Sox prospect Marcelo Mayer out for rest of 2023
Marcelo Mayer drafted No. 4 by Red Sox in MLB Draft