Marcelo Mayer: Breaking News, Rumors & Highlights
MLB Prospect Rankings: Top 10 Prospects at Each Position, August Edition, News, Scores, Highlights, Stats, and Rumors
MLB's top 2022 prospects feature three elite players with red-hot rookie cards - Sports Collectors Digest
Red Sox prospect Marcelo Mayer's custom cleats at Futures Game - ESPN
Marcelo Mayer: Breaking News, Rumors & Highlights
MLB offseason tracker: Blue Jays add Chad Green to bullpen MLB - Bally Sports
Red Sox promote top prospect Marcelo Mayer to Double-A Portland
Three Red Sox Rank Highly On FanGraphs' Top 100 MLB Prospects List
Marcelo Mayer continues climb in MLB's Top 100 prospect rankings
2021 Best Of Baseball America — College Baseball, MLB Draft, Prospects - Baseball America
Transcript: ESPN MLB Insider Kiley McDaniel Previews the 2021 MLB Draft - ESPN Press Room U.S.
The Red Sox Farm System of the Future is Here and it is Beautiful
What Experts Are Saying About Red Sox Draft Pick Marcelo Mayer - CBS Boston
Red Sox Prospect Outlook: Marcelo Mayer Destined For Stardom?