Red Sox No. 1 Prospect Marcelo Mayer Promoted to Portland
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Top Red Sox prospect Marcelo Mayer collects four hits
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Prospect Marcelo Mayer 'feeling confident' as he arrives at Double-A Portland - The Athletic
What to expect from the top 10 Red Sox prospects in 2023 – NBC Sports Boston
Red Sox top prospect Marcelo Mayer on fire for High-A Greenville – NBC Sports Boston
Welcome to Greenville: Mayer, Jordan Set to Join Drive