Perfect Game All-American Pitchers Scouting Notebook • Prospects
2021 MLB Draft: Red Sox first-round pick Marcelo Mayer quickly
2021 MLB Draft profile: SS Marcelo Mayer is the Tigers' top target
2021 MLB Draft - Top 600 Prospects — Prospects Live
MLB Top 100 Prospects 2023: Final Update
Red Sox draft top high school shortstop Marcelo Mayer with No. 4 pick
Top prospects in 2024
2021 MLB Draft - Top 600 Prospects — Prospects Live
Top 2021 MLB Draft prospects