Marcelo Mayer

The Red Sox signed their first-round pick, SS Marcelo Mayer.

Fantasy Impact

Mayer receives $6.664 million, which is the full slot value for the No. 4 overall selection. This should be considered a big win for Boston, who can now go over slot for Jud Fabian and Nathan Hickey. Mayer was considered the top prospect in the 2021 class, and he's already a top-40 minor league talent in the eyes of many evaluators. Mayer comes in at No. 31 in Brendan Tuma's latest Top 100 prospect rankings.

Red Sox first-round pick SS Marcelo Mayer says that he wants to sign "as soon as possible."

Fantasy Impact

This is great news for Red Sox fans and dynasty league managers who want to see what Mayer is capable of as a professional. Mayer was considered the top prospect available in this weekend's draft, but the slick-fielding shortstop fell to Boston at No. 4 overall. Mayer projects as a four-category fantasy contributor, though he'll take several years to reach the majors coming out of high school. Corey Seager is a great comp for Mayer's offensive skill set.

The Red Sox have drafted prep shortstop Marcelo Mayer with the fourth overall pick in the 2021 MLB Draft.

Fantasy Impact

Boston didn't go with an unconventional pick this time around, instead landing the talented Eastlake High School product. Mayer has an incredible blend of tools across the board. He is a talented hitter and fielder with an advanced approach at the plate and in the field. The 18-year-old was viewed by many as the top prospect in the entire draft.