Red Sox Bullpen Blow: Slaten Lands on IL
Red Sox Update: Injuries, Contract Milestones, and Roster Moves Explained Simply
Quick Note: This update covers games from mid-August 2026. Think of it like a "what happened this week" recap for the Boston Red Sox.
What Happened to Pitcher Slaten?
The short version: Relief pitcher Justin Slaten felt arm soreness after two recent games. He tried to warm up on Saturday but realized it was getting worse, so the team put him on the Injured List (IL) — think of it like a "time-out" bench for hurt players.
Timeline of the Ouchies
- Aug. 9: Felt sore after pitching against the Oakland A’s.
- Aug. 12: Felt sore again after an inning vs. the Toronto Blue Jays.
- Aug. 16 (Saturday): Started warming up in the bullpen during the game vs. the Pittsburgh Pirates, but the discomfort had worsened. He stopped immediately.
IMPORTANT: Why This Matters
Slaten told reporters: "It just got a little too much… not recovering well at all. It’s better for me, for the team… to just go ahead and get this cleaned up… and then be ready to go down the stretch."Translation: Rest now = stronger for the playoff push later.
How Good Was He Before This?
Don’t let his season ERA (Earned Run Average) of 4.60 fool you — that number is inflated by a rough start.
- Since May 22: He hasn’t blown a single lead.
- July 7 – Aug. 2 (10 games): 8⅔ scoreless innings, 10 strikeouts, only 1 walk. That is elite relief pitching.
What’s Next?
- He meets a doctor in Boston this week.
- Might need an MRI (a detailed picture of the inside of his arm), but previous soreness didn’t require one.
- Team is "pretty confident that hopefully it won’t take too long."
Aroldis Chapman Just Earned a $13 Million Jackpot
The short version: By pitching a scoreless 9th inning on Saturday (in a non-save situation), closer Aroldis Chapman made his 40th appearance of the season.
Why 40 Appearances = $13 Million
His contract had a mutual option for the 2027 season. It basically said: "If you pitch in 40 games this year, we both agree you stay next year for $13 million (provided you pass a physical)."
Condition met. He gets the money; the Sox keep one of baseball’s best closers.
Why the Sox Are Thrilled
In two years with Boston, Chapman has been historic:
- 1.50 ERA → Lowest in team history for any pitcher with 100+ innings.
- 34% Strikeout Rate → 3rd highest in team history.
- Chapman’s quote: "I feel like home here… super happy that I’m able to come back next year."
Masataka Yoshida Hurt His Hamstring
The short version: The team’s Designated Hitter (DH) — the guy who bats but doesn’t play the field — Masataka Yoshida pulled his hamstring Saturday night. He went on the IL Sunday.
His Season So Far
- Overall: .274 batting average / .347 on-base % / .399 slugging %.
- August (before injury): ON FIRE → .326 / .380 / .512.
- He had earned the leadoff spot (batting 1st) because he was hitting so well.
What’s Next?
- Examined in Boston this week.
- Timeline unknown — hamstrings can be tricky (weeks to months).
The "Next Man Up" Moves (Roster Shuffling)
With Slaten and Yoshida on the IL, the Sox called up two players from Triple-A Worcester (the "WooSox"):
| Player | Role | Why He’s Here |
|---|---|---|
| Mickey Gasper | Catcher / Infielder | Versatile backup. Hit .337/.450/.566 in Triple-A (video game numbers). Played 34 games for Sox earlier this year (.243 avg). |
| Raymond Burgos | Left-handed Reliever | Proven "bulk inning" guy. Earlier this month: 6 innings over 2 straight days. Sunday: 4 innings of 1-run ball around a 2hr 34min rain delay. Rubber arm! |
The Trade for Erik Miller Looks Genius Now
The Sox traded for lefty Erik Miller at the deadline. With Slaten (and Garrett Whitlock, already out) gone, Miller is critical.
Miller’s Stats Since Arrival
- 0.00 ERA (Hasn’t allowed an earned run).
- 41% Strikeout Rate (Insanely high).
Interim Manager Chad Tracy: "This is why [we traded for Miller]… saying there’s still some viable options down there to get us through this, it’s very important."
Other Quick Hits
Willson Contreras: "Maintenance Day"
- 1B Willson Contreras got Sunday off to rest a left hamstring.
- Team manages it carefully. Tracy: "He keeps us posted… getting a day to make sure we can get him healthy and on the field."
Trevor Story: Rehab Started!
- SS Trevor Story (out since mid-May with a sports hernia) began his rehab assignment in Triple-A.
- Line: 1-for-2, played 4 innings at shortstop. Baby steps back!
Monday’s Starter: Alec Gamboa (Bullpen Game)
- Sox play 16 straight days — pitchers need rest.
- Monday vs. Diamondbacks: Alec Gamboa starts (essentially a "bullpen game" — using multiple relievers).
- Brayan Bello available behind him.
- Strategic Rest Given To:
- Ranger Suárez (starts Tuesday) → 5 days rest.
- Payton Tolle (starts Wednesday) → 5 days rest.
- Rookie Jake Bennett → Extra days off, won’t pitch until next weekend vs. Giants.
Summary: The Big Picture
- Bullpen Hit: Lost Slaten (key late-inning guy) to arm soreness. Whitlock already out.
- Lineup Hit: Lost Yoshida (hot hitter, leadoff) to hamstring.
- Safety Net Held: Trade for Erik Miller (0.00 ERA, 41% K%) looks brilliant. Burgos ate 4 huge innings Sunday.
- Star Power Locked: Chapman vested $13M option for 2027 — elite closer staying put.
- Help Coming: Story started rehab. Contreras just needed a day.
- Smart Managing: Tracy navigating 16 straight days with creative rotation (bullpen game Monday) to protect young arms (Bennett) and veterans (Suárez, Tolle).
FAQ: Your Questions Answered
1. What exactly is the "Injured List (IL)"?
Think of it as the "official injured bench." When a player goes on the IL, they don’t count against the 26-man active roster limit, allowing the team to call up a healthy replacement (like Gasper/Burgos). There’s a 10-day IL (for position players/pitchers) and a 15-day IL (pitchers only) and a 60-day IL (long-term). Slaten/Yoshida are likely on the 10- or 15-day.
2. What is a "Mutual Option" in a contract?
It’s a team option AND a player option combined for a future year.
- Team Option: Team decides "Yes/No."
- Player Option: Player decides "Yes/No."
- Mutual Option: BOTH must say "Yes" for it to happen.
- Chapman’s trigger: 40 games pitched. He hit it → Both sides want him back → Guaranteed 2027 at $13M.
3. What is a "Bullpen Game"?
Instead of one starter going 5-6+ innings, the manager uses a chain of relievers (3-5 guys) for 1-2 innings each to cover the whole game.
- Why Monday? To give extra rest to the real starters (Suárez, Tolle, Bennett) during a grueling 16-games-in-16-days stretch. Gamboa opens; Bello is the primary "long man" behind him.
4. What is a "Sports Hernia" (Trevor Story)?
Not a true hernia (organ pushing through muscle). It’s a tear/strain in the soft tissue (muscles/tendons) of the lower abdomen/groin area. Very common in hockey/baseball (twisting motions). Surgery + rehab usually 6-8+ weeks. Story is right on track starting rehab games now.
5. Why is Erik Miller’s "41% Strikeout Rate" such a big deal?
Strikeout Rate (K%) = % of batters faced that strike out.
- League Average Reliever: ~23-24%.
- Elite Reliever: ~30-35%.
- Miller: 41%. That means he strikes out ~2 of every 5 batters he faces. It makes him incredibly reliable — he doesn’t need luck on balls in play; he just misses bats. Perfect for high-leverage innings with Slaten/Whitlock down.