Boston Red Sox reliever Justin Slaten broke his silence this week regarding a nagging shoulder injury that recently landed him on the injured list, raising concern among fans and team officials alike. After weeks of speculation surrounding his health, the 26-year-old right-hander provided a detailed and encouraging update, offering both clarity and optimism about his road to recovery.
Slaten, who had been a bright spot in the Red Sox bullpen early in the 2025 season, exited a May 14 game against the Tampa Bay Rays after experiencing discomfort in his throwing shoulder. Following immediate evaluation and imaging, the team placed him on the 15-day injured list, citing right shoulder inflammation. While the injury was initially described as minor, the lack of updates over the subsequent weeks raised alarm about the pitcher’s status and long-term availability.
“I’ve been feeling it build up for a little while,” Slaten told reporters at Fenway Park during a press conference on Friday. “It wasn’t anything sharp or sudden, just a gradual tightness that finally reached the point where I couldn’t ignore it anymore. We decided it was best to shut things down for a bit and get it right rather than risk making it worse.”
Encouraging Diagnosis
According to Slaten and the Red Sox medical staff, the imaging results confirmed that there was no structural damage—no tears or major inflammation—just what doctors described as “rotator cuff fatigue and strain.” The diagnosis was a relief not only for Slaten but for the organization, which has dealt with multiple injuries to key pitchers this season.
“Anytime a pitcher talks about shoulder issues, especially in-season, there’s always going to be concern,” said Red Sox manager Alex Cora. “But the good news is that it’s something we caught early, and the medical team is confident he’ll be back without any long-term impact.”
Slaten began a rehab program immediately following the diagnosis, which includes rest, physical therapy, and a carefully monitored throwing program. He has already resumed light throwing sessions and says he’s been responding well.
Timeline for Return
While no firm date has been set for his return, Slaten offered a rough timeline that puts him back on the mound by mid-to-late June.
“We’re taking it one step at a time, but if everything continues to go as planned, I’m hopeful to start throwing off a mound within the next 10 to 12 days,” Slaten said. “From there, I’ll likely need a few bullpen sessions, maybe a rehab appearance or two. If all goes smoothly, I could be back with the team before the All-Star break.”
The Red Sox bullpen has felt Slaten’s absence in recent weeks. A reliable arm in the middle innings, Slaten had posted a 2.61 ERA over 21 appearances, with 27 strikeouts and just six walks in 20.2 innings. His ability to consistently pound the strike zone and generate swings-and-misses has been crucial in bridging the gap between the starting rotation and the back-end of the bullpen.
A Team Player Through and Through
Despite being sidelined, Slaten remains deeply involved with the team, staying close to his teammates and participating in scouting meetings and bullpen discussions.
“Even if I’m not throwing, I want to contribute in any way I can,” he said. “Whether it’s helping younger guys, giving feedback, or just being part of the clubhouse atmosphere, I’m all in.”
His presence has been felt, especially by younger relievers like Cam Booser and Zack Kelly, who have stepped into larger roles with several arms out due to injury.
“He’s been huge for us, even while hurt,” said Booser. “He’s always talking mechanics, pitch sequencing, giving advice. He’s the kind of teammate you want around.”
Looking Ahead
As the Red Sox continue to battle for positioning in the competitive AL East, Slaten’s return could provide a critical boost. Boston’s bullpen ERA has crept upward in recent weeks, and with games often decided in the late innings, his presence could make the difference in tight matchups.
“The season is a grind, and these things happen,” Slaten said. “What matters is how you respond. I’m doing everything I can to come back stronger, and I’m grateful to the team, the fans, and the training staff for their support.”
With promising rehab progress and an upbeat outlook, Red Sox Nation has good reason to remain hopeful that Justin Slaten will soon be back where he belongs—on the mound, helping Boston compete at the highest level.
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