Boston Red Sox shortstop Marcelo Mayer cleared a notable milestone in his rehabilitation during the club's series with the Toronto Blue Jays: the 23-year-old has begun to hit off a tee as his hitting program advances, the team reported July 25.
Rehab update and what it means
The update, relayed by MLB.com and announced while the Red Sox were wrapping up a three-game set at Fenway Park, follows Mayer's exit from active play on June 25. The shortstop has been sidelined since that date and the club's most recent public status noted that his "hitting program is progressing and the shortstop is starting to hit off a tee."
That progress does not equate to an immediate timetable for Mayer's return to game action. Hitting off a tee is typically an early, controlled step in returning players' swing mechanics and batting timing without the velocity and reaction demands of live pitching. For a developing position player like Mayer, it is a metric teams watch closely because it signals the ability to begin more advanced batting work.
Where Mayer stood before the injury
Before the injury sidelined him, Mayer had appeared in 70 games and posted a stat line that reflected both limited production and playing time: a .220 batting average with 45 hits, 3 home runs, 22 RBIs, 19 runs scored and 3 stolen bases. Those numbers arrived after Mayer — the No. 4 overall pick in the 2021 MLB Draft — reached the major-league level and entered what is described as his second big-league season, all with Boston.
At 23 years old, Mayer remains a projected part of the Red Sox's long-term middle-infield plans. Through two seasons, the organization has emphasized his potential even as Mayer works to translate prospect pedigree into consistent MLB production.
Team context during Mayer's absence
The Red Sox announced the Mayer update during a decisive day of a Fenway series in which Boston and Toronto were tied 1-1 entering Sunday play. Boston had dropped Saturday's game by a 6-0 score. Through 103 games, the Red Sox carried a 53-50 record and were described as the hottest team in baseball over the two weeks preceding the announcement. Over their most recent 10 games they were 8-2; at Fenway Park this year they had gone 24-29 in 53 home games.
Those team metrics frame the practical importance of Mayer's return timetable: a middle infielder who can handle shortstop and contribute offensively would matter to a club attempting to sustain a late-season push from a third-place position in the American League East.
- Injury timeline: Out since June 25; update provided July 25.
- Rehab milestone: Started hitting off a tee as part of a structured hitting program.
- Pre-injury stats: .220 AVG, 45 H, 3 HR, 22 RBI in 70 games.
"Hitting program is progressing and the shortstop is starting to hit off a tee." — MLB.com, July 25
| Metric | Value |
|---|---|
| Games played (2026) | 70 |
| Batting average | .220 |
| Hits | 45 |
| Home runs | 3 |
| RBIs | 22 |
For Red Sox management and Boston fans, Mayer's progress will be monitored alongside the club's short-term roster moves and recent momentum. The club's announcement offers a cautious but positive signal: Mayer is on a structured path back toward batting activity, but the organization has not projected a specific return date.
How the next steps unfold — transitioning from tee work to live batting practice, then to simulated innings and a potential assignment on a minor-league rehab stint — will determine when Mayer is cleared for regular-season duty. Each stage presents measurable checkpoints staff will use to protect the player's health while evaluating whether his bat and glove can contribute to a Red Sox team trying to sustain a late-season surge.
As the Red Sox continue their Fenway stretch and move through the remainder of their schedule, updates on Mayer will be consequential for lineup decisions and the club's infield depth. For now, Boston has received a hopeful, evidence-based sign that one of its youngest everyday-position pieces is closer to getting back on the field.
