2021 MLB Draft: Red Sox select No. 1-ranked prospect Mayer, Local Sports
2021 MLB Draft: Marcelo Mayer headlines eight high school shortstops taken in first round
Four Red Sox minor-leaguers among Baseball America's Top 100 prospects rankings - The Boston Globe
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MLB draft day one highlights - Beyond the Box Score
2021 MLB draft tracker live updates - Results for all first-round picks, order, analysis and highlights - ESPN
2021 MLB Draft Instant Analysis, Full Scouting Reports For Every First-Round Pick — College Baseball, MLB Draft, Prospects - Baseball America
All The Players Drafted By Red Sox In 2021 MLB Draft - CBS Boston
Six Things To Know About Red Sox First-Round Draftee Marcelo Mayer
MLB Draft 2021: A scouting report on Boston Red Sox pick Marcelo Mayer - Over the Monster
Arizona picks Jesuit's Jordan Lawlar 6th in MLB draft; will elite prospect sign or head to college?