Marcelo Mayer

20-Year-Old ShortstopSS
Boston Red Sox A+
2023 Fantasy Outlook
Mayer's top skill so far in pro ball has been his patience at the plate, sporting a career 15.6 BB% in 531 plate appearances from rookie ball through High-A. His strikeout rate has remained a steady 25% while showing average game power as a teenager. Despite middling home run totals, Mayer's 36.0 Hard% and 14.0 Soft% were excellent marks in his full-season debut, and he could end up with above-average or plus game power in a few years. He's nearly physically mature and nowhere near as fast as his 17-for-17 on the bases in 2022 indicates. He doesn't have the typical athleticism associated with shortstop, but most evaluators believe he can stick there, at least early in his big-league career. At this point, Mayer might be more appealing in dynasty leagues for his high floor than his ceiling, but there are still some pretty high-end potential outcomes if he can cut down on the strikeouts in the coming years. Read Past Outlooks
$Signed a $6.66 million contract with the Red Sox in July of 2021.
Ends High-A season hot
SSBoston Red Sox  A+
September 21, 2022
Mayer finished the season at High-A Greenville by going 14-for-31 (.452) with a homer, a steal and a 7:7 BB:K through his final eight games. Overall, he batted .265/.379/.449 with four homers in 25 games following his promotion.
Mayer put together a strong first full pro season between Greenville and Single-A Salem, compiling 13 homers and 17 steals with an .887 OPS across 91 contests. Still just 19 years old, the 2021 draft's No. 4 pick has the look of a future franchise shortstop for Boston, but he's still at least a couple years from the big leagues.
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2022 Fantasy Outlook
Four of the top six fantasy prospects from the 2021 draft were prep shortstops, and Mayer may be the best of the bunch. Some analysts thought he should have been the pick at 1-1, but he slid to Boston with the fourth-overall pick and signed for slot value ($6.66 million). His bat will be his calling card, as he projects as a plus hitter from the left side who should grow into plus all-fields power. At 6-foot-3, 188 pounds, he has a prototypical frame to grow into without compromising his baseball actions. He is just a fringe-average runner now and should slow down, so his range won't be great, but he's a very smooth defender who makes all the routine plays. Mayer was as good as advertised in his limited pro debut, hitting .275/.377/.440 with three home runs and a 121 wRC+ in 26 games in the Florida Complex League. His patience at the plate was noteworthy (14.0 BB%), and while he didn't face strong competition, he was age-appropriate for the level. His picturesque left-handed swing and extensive track record make him as close to a can't-miss high school prospect as we've seen in recent years.
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Headed to High-A
SSBoston Red Sox  A+
August 8, 2022
Red Sox farm director Brian Abraham confirmed Monday that Mayer has been promoted from Single-A Salem to High-A Greenville, Alex Speier of The Boston Globe reports.
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Overcomes back injury
SSBoston Red Sox  A+
July 14, 2022
Mayer (back) went 3-for-5 with a home run, two walks and a stolen base in two games for Single-A Salem since he exited Sunday's game against Delmarva.
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Dealing with low-back tightness
SSBoston Red Sox  A+
July 10, 2022
Mayer was removed from the first game of a doubleheader at Single-A Salem due to low-back tightness, Jen McCaffrey of The Athletic reports.
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Returns from IL
SSBoston Red Sox  A+
May 31, 2022
Mayer (wrist) returned from the injured list and went 1-for-3 with a walk, a double, an RBI and a run scored for Single-A Salem on Monday.
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Placed on injured list
SSBoston Red Sox  A+
May 22, 2022
Mayer (wrist) was placed on the 7-day minor-league injured list Sunday, Alex Speier of The Boston Globe reports.
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