Full Breakdown
Red Sox Place Marcelo Mayer on 10-Day IL Amid Growing Infield Injury Crisis
6/27/2026, 5:15:17 AM
Mayer’s IL Placement and Diagnosis
The Boston Red Sox placed 23-year-old infielder Marcelo Mayer on the 10-day injured list on Friday, June 26, 2026. Team doctors diagnosed a bone stress reaction in his left ulna, a condition similar to that affecting teammate Isiah Kiner-Falefa. The move followed a CT scan that confirmed the injury after Mayer went 0-for-4 against the New York Yankees.
Recent Infield Injuries and Depth Challenges
Mayer’s sidelining marks the third Red Sox infielder to land on the IL this season. Shortstop Trevor Story required sports-hernia surgery in May, Kiner-Falefa entered the IL with a forearm injury last week, and other middle-infielders—including Nick Sogard (right-oblique strain) and Romy González (shoulder surgery)—remain on the list. The cumulative losses have left Boston with limited healthy infield depth.
Players Involved and Call-Up of Tsung-Che Cheng
To fill Mayer’s spot, Boston recalled 24-year-old infielder Tsung-Che Cheng from Triple-A Worcester. Cheng, claimed off waivers from Washington in February, will wear number 39 and start at shortstop against the Yankees. The team also plans to split shortstop duties between Cheng (right-handed hitters) and Andruw Monasterio (left-handed hitters) while González continues rehab in Worcester.
Mayer’s Performance Metrics
Before his injury, Mayer appeared in 70 games, posting a .220/.282/.312 slash line with three home runs and 22 RBIs. He logged 39 starts at second base and 20 at shortstop. Career-to-date, he is a .223 hitter with a .625 OPS in 114 major-league games, all with Boston.
Implications for Red Sox Roster and Upcoming Games
The loss deepens Boston’s infield crisis as the club approaches the trade-deadline. With ace pitcher Garrett Crochet also unavailable, the Red Sox must rely on depth players and recent call-ups to sustain competitiveness. Cheng’s debut provides a short-term solution, but the team’s broader roster flexibility remains constrained.
Official Statements & Responses
Interim manager Chad Tracy explained that medical staff recommended rest to prevent further damage, noting the injury developed gradually rather than from a single incident. He emphasized the need to move on and rely on the next player up. Mayer expressed frustration over his recurring injuries but accepted the decision to sit out, indicating a week-to-week evaluation will determine his return.
On-the-Ground Perspective
Mayer described the forearm issue as “on and off” for two months, affecting both his glove work and swing. He voiced disappointment with his performance, acknowledging that the injury would not be used as an excuse for his struggles at the plate.
Conflicting Reports & Gaps
Sources differ on the projected severity and timeline for Mayer’s return. Some reports label the condition “not serious” and suggest a possible return by the July 7-9 series against the White Sox, while others note the injury’s similarity to Kiner-Falefa’s more severe case and provide no specific timetable. No clear guidance exists on when the Red Sox will activate a replacement infielder beyond Cheng’s immediate assignment.
Verbatim Quotes
- “The recommendation of the doctors was if this is something that if you can get off and rest, that would be the best thing to do right now,” — Chad Tracy, Interim Manager
- “Bony stress reaction, very similar to Izzy believe it or not with his forearm, that’s what Marcelo has going on and has off and on for a period of time,” — Chad Tracy
- “Approaching two months, [the injury has] just been on and off. Some days have been worse than others,” — Marcelo Mayer, Infielder
- “I want to be out there playing more than anybody. If it was up to me, I would still be playing,” — Marcelo Mayer
- “We’ve taken some hits,” — Chad Tracy
What’s Next
Boston will monitor Mayer’s condition weekly, with the earliest possible return slated for the July 7-9 series if healing permits. Meanwhile, the Red Sox will continue to assess additional roster moves as the trade deadline approaches, balancing short-term depth needs against long-term health considerations for their young infield core.