Marcelo Mayer is rising in ESPN's rankings of top MLB prospects
farm system – Blogging the Red Sox
Marcelo Mayer, the Red Sox' top prospect, already looks destined for the big leagues - The Boston Globe
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Marcelo Mayer leads four Red Sox on Baseball America's Top 100 prospects for 2022
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Marcelo Mayer, top MLB Draft 2021 pick, may be the best Boston Red Sox prospect - Over the Monster
Boston Red Sox prospect Marcelo Mayer ranked No. 22, compared to Corey Seager, Christian Yelich on ESPN list
MLB Top 100 Prospects — Post-Draft Update, by Nae, Aug, 2023
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farm system – Blogging the Red Sox
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