Out
Injury Back
Est. Return 2/1/2025
2024 Stats
AVG
.000
HR
0
RBI
0
R
0
SB
0
2025 Projections
2025 Fantasy Outlook
Mayer mastered Double-A (142 wRC+ in 77 games) after struggling at that level in 2023 (63 wRC+ in 43 games), but after another injury-marred season, his fragility is starting to become his most discussed quality. His 91 games in 2022 represent a career high, and perhaps fittingly, he was promoted to Triple-A in early August but never got into a game for Worcester due to hip and back injuries. He slashed .307/.370/.480 with eight home runs, 13 steals, a 19.7 percent strikeout rate and an excellent 31.5 percent hard-hit rate as a 21-year-old repeating Double-A. Mayer's best skills are his shortstop defense, followed by above-average power and a potentially above-average hit tool. He has multiple years with double-digit steals in the minors, but Mayer's pure speed is average at best, so we can't bank on him making a notable impact in stolen bases. Even if Mayer reached his realistic fantasy ceiling, he'd be a fringe top-15 fantasy shortstop due to the lack of a standout tool, and his durability issues make it difficult to sell him as a potential compiler in the Dansby Swanson mold. He'll be an option this summer if he's healthy and Trevor Story is hurt or struggling. Read Past Outlooks
Begins baseball activity
Mayer (back) has started baseball activities, Jen McCaffrey of The Athletic reports.
ANALYSIS
Mayer, who missed the final month of last season with a lumbar strain, is progressing well and slated to be a full-go for spring training. He had been the organization's top prospect before Roman Anthony's monster season in 2024. The Red Sox, who were involved in and lost out in the Juan Soto hunt, are looking to upgrade the roster at the MLB level. That means potentially parting with one of their big four prospects, which includes Mayer, Anthony, Kristian Campbell (lat) and Kyle Teel. If still with the team next spring, Mayer is expected to open 2025 at Triple-A Worcester.
Mayer, who missed the final month of last season with a lumbar strain, is progressing well and slated to be a full-go for spring training. He had been the organization's top prospect before Roman Anthony's monster season in 2024. The Red Sox, who were involved in and lost out in the Juan Soto hunt, are looking to upgrade the roster at the MLB level. That means potentially parting with one of their big four prospects, which includes Mayer, Anthony, Kristian Campbell (lat) and Kyle Teel. If still with the team next spring, Mayer is expected to open 2025 at Triple-A Worcester.
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Past Fantasy Outlooks
2024
2023
2022
Mayer will be a big-league regular, but the closer he gets to the majors, the less he looks like a future fantasy star. As one of the slower shortstop prospects of note, Mayer won't be a major threat on the bases, so he has to move the needle at the plate. His walk rate has decreased at every full-season stop, dipping to 7.9 percent in 43 games at Double-A, and his 25.8 percent strikeout rate at Double-A was the worst mark of his career. Mayer reportedly dealt with a left shoulder impingement during his struggles at Double-A, and he eventually got shut down in early-August and received an injection in September. He has a career .280/.371/.494 slash line with 11 home runs in 60 games at High-A, so if the injury was the cause of his issues at Double-A, he could bounce back with similar production to what he showed at High-A in 2022 and 2023. A big reason Mayer ranks highly on real-life prospect rankings is his plus defense at shortstop, and while that figures to guarantee him playing time in the future, that's the extent of its importance for his fantasy value. He could debut late this year, but don't expect him to produce at an acceptable clip in fantasy until at least 2025.
More Fantasy News
Likely done for season
Mayer has shifted his rehab program to the Red Sox's facility in Florida and is not expected to return from Triple-A Worcester's 7-day injured list before the end of the season while he recovers from a lumbar strain, Alex Speier of The Boston Globe reports.
ANALYSIS
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Goes back on Triple-A IL
Triple-A Worcester will place Mayer (hip) on the 7-day injured list Tuesday, Alex Speier of The Boston Globe reports.
ANALYSIS
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Day-to-day with hip issue
Mayer hasn't played since July 30 due to a hip issue, but he is considered day-to-day, Katie Morrison-O'Day of MassLive.com reports.
ANALYSIS
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Moves up to Triple-A
The Red Sox promoted Mayer from Double-A Portland to Triple-A Worcester on Sunday, Alex Speier of The Boston Globe reports.
ANALYSIS
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On 7-day IL at Double-A
Double-A Portland placed Mayer on the 7-day injured list Thursday with hip irritation, Mac Cerullo of the Boston Herald reports.
ANALYSIS
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Latest Fantasy Rumors
Unlikely to skip Triple-A
Sean McAdam of The Springfield Republican doesn't expect the Red Sox to call up Mayer directly from Double-A Portland this season.
ANALYSIS
The 21-year-old was limited to 78 games last season due to shoulder issues, but he's been healthy so far in 2024 and has hit well for Portland with a .293/.337/.467 slash line in 41 games. Mayer is Boston's top infield prospect, and the organization is unlikely to rush his development this summer. A promotion to Triple-A Worcester at some point in 2024 seems likely given his current production, and he should have a good chance of making his MLB debut in 2025.
The 21-year-old was limited to 78 games last season due to shoulder issues, but he's been healthy so far in 2024 and has hit well for Portland with a .293/.337/.467 slash line in 41 games. Mayer is Boston's top infield prospect, and the organization is unlikely to rush his development this summer. A promotion to Triple-A Worcester at some point in 2024 seems likely given his current production, and he should have a good chance of making his MLB debut in 2025.