Prospect Marcelo Mayer 'feeling confident' as he arrives at Double
Marcelo Mayer tops Baseball America's Red Sox prospect rankings
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Red Sox prospect Marcelo Mayer hits first homer of season for
Marcelo Mayer records first hits for Double-A Portland
As Red Sox shut down Marcelo Mayer, rival prospects take off
Top Red Sox prospect Marcelo Mayer shut down for rest of season
Red Sox Prospect Marcelo Mayer Fitting In Since Portland Promotion
Marcelo Mayer, the Red Sox' top prospect, already looks destined
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Marcelo Mayer is killing it in the minors! : r/redsox
Marcelo Mayer ready for next step at Red Sox camp
Marcelo Mayer autographed card sells for $132,000
Marcelo Mayer - MLB Shortstop - News, Stats, Bio and more - The