What Experts Are Saying About Red Sox Draft Pick Marcelo Mayer - CBS Boston
2021 MLB Draft profile: SS Marcelo Mayer is the Tigers' top target - Bless You Boys
MLB Draft 2021: Marcelo Mayer and Five Other Prospects to Watch - The New York Times
MLB Draft 2021: Marcelo Mayer and Five Other Prospects to Watch - The New York Times
Marcelo Mayer, Boston Red Sox 2021 first-round pick, walks three times in professional debut in FCL
Wikipedia:CHECKWIKI/WPC 111 dump - Wikipedia
2021 MLB Draft Scouting Report: SS Marcelo Mayer - Lookout Landing
MLB Draft 2021: Marcelo Mayer and Five Other Prospects to Watch - The New York Times