Top 2021 MLB Draft prospects
2021 MLB Draft - Top 600 Prospects — Prospects Live
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2021 MLB Draft Scouting Report: SS Marcelo Mayer - Lookout Landing
Red Sox draft top high school shortstop Marcelo Mayer with No. 4 pick
2021 MLB Draft Scouting Report: SS Marcelo Mayer - Lookout
Marcelo Mayer, Marcelo Mayer Profile
Top prospects in 2024
2021 MLB Draft - Top 600 Prospects — Prospects Live
Marcelo Mayer wasn't supposed to be there for the Red Sox at No. 4