Marcelo Mayer is the biggest Red Sox prospect to hit Portland in a decade. Catch him while you can. – The Portland Phoenix
Red Sox promote top prospect Marcelo Mayer to Double-A Portland
aqqu/results/final_wq_evaluation_output_onlyngram.txt at master · ad-freiburg/aqqu · GitHub
Top Red Sox prospect records first 3 hits since promotion to Portland
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Marcelo Mayer's HUGE 3-Hit Game!, Boston Red Sox Prospect
Red Sox top prospect Marcelo Mayer embracing stop with Sea Dogs
Red Sox promote top prospect Marcelo Mayer to Double-A Portland
Watch Red Sox prospect Marcelo Mayer record his first professional hit
Red Sox top prospect Marcelo Mayer promoted to Double A Portland after tearing it up throughout the month - The Boston Globe
Red Sox promote top prospect Marcelo Mayer to Sea Dogs