BOS @ TORFinal 4-6, Aug 12, 2026
IP 1.0, H 0, R 0, ER 0, BB 1, K 1, HR 0, PC-ST 21-14, ERA 4.60, PC 21
Betting: BOS moneyline lost, run line -1.5 did not cover
BaseballMLBBoston Red SoxRelief pitcher
Justin Slaten
Stats, career and game logInjury status: Out, elbow - ESPN report of Nov 2
Justin Slaten is a relief pitcher for the Boston Red Sox who made his MLB debut on Mar 30, 2024.
118 MLB games122 strikeouts
Updated
About Justin Slaten
Born in Longview, Texas, on September 15, 1997, Justin Slaten is a relief pitcher for the Boston Red Sox in MLB, wears number 63, and throws right-handed. His MLB debut came on Mar 30, 2024, with the Boston Red Sox.
In the 2024 regular season, Slaten pitched in 44 games for the Boston Red Sox with a 2.93 ERA and 58 strikeouts in 55.1 innings. Through the 2025 season, he had a 3.43 ERA and 83 strikeouts in 89.1 innings over 80 games.
Agatha Research DeskUpdated Nov 3, 2026Season by season118
118 appearances: 116 regular season, 2 postseason. Every MLB appearance of his career, newest season first.
| Season | Team | Games | Starts | IP | K | BB | ERA | WHIP |
|---|---|---|---|---|---|---|---|---|
| 2026 | BOS | 36 | 0 | 31.1 | 39 | 8 | 4.60 | 1.37 |
| 2025 | BOS | 36 | 0 | 34.0 | 25 | 10 | 4.24 | 1.09 |
| 2025 postseason | 2 | 0 | 2.0 | 1 | 1 | 4.50 | 1.00 | |
| 2024 | BOS | 44 | 0 | 55.1 | 58 | 9 | 2.93 | 1.01 |
| Career | 116 | 0 | 120.2 | 122 | 27 | 3.73 | 1.13 | |
| Career postseason | 2 | 0 | 2.0 | 1 | 1 | 4.50 | 1.00 |
How he is doing now
2026 pitching4.60 ERA31.1 innings, 39 strikeouts, 1.37 WHIP
Red Sox87-752026 regular season, 0-2 in the playoffs
Last game1.0 IP, 1 K, 0 ERAug 12 at Blue Jays
Injury status
Out elbow (9d ago)
Game log, 2026
ATH @ BOSFinal 7-3, Aug 8, 2026
IP 0.2, H 1, R 1, ER 1, BB 1, K 0, HR 0, PC-ST 14-6, ERA 4.75, PC 14
Betting: BOS moneyline lost, run line -1.5 did not cover
Box score lines from ESPN.
Betting: his team's result at the closing moneyline and run line most of our sportsbooks closed at (3 books or more).
Career
2years2024 to 2026
- 2024MLB debut4-3 loss vs Mariners
- 2024Best season55.1 IP, 58 K, 2.93 ERA in 44 games
- Aug 12, 2026Latest game1.0 IP, 1 K, 0 ER at Blue Jays
Regular season
116 games
120.2 IP, 122 K, 3.73 ERA
Postseason
2 games
2.0 IP, 1 K, 4.50 ERA
First MLB game
Mar 30, 2024Mariners 4, Red Sox 3
Latest game
Aug 12, 2026: 1.0 IP, 1 K, 0 ERBlue Jays 6, Red Sox 4
Most often against
The teams he has faced most, with his teams' record and his line against each.
Tampa Bay Rays12 games
8-4his teams
His line: 12.1 IP, 18 K, 2.19 ERA
Last met Jul 17, 2026
New York Yankees11 games
6-5his teams
His line: 12.0 IP, 14 K, 4.50 ERA
Last met Jun 28, 2026
Toronto Blue Jays11 games
5-6his teams
His line: 10.2 IP, 8 K, 3.38 ERA
Last met Aug 12, 2026
Chicago White Sox9 games
7-2his teams
His line: 9.2 IP, 14 K, 2.79 ERA
Last met Aug 6, 2026
Athletics8 games
5-3his teams
His line: 7.1 IP, 3 K, 3.68 ERA
Last met Aug 8, 2026
Baltimore Orioles8 games
6-2his teams
His line: 8.0 IP, 5 K, 1.12 ERA
Last met Jul 22, 2026
Injury history
ESPN's injury reports, newest first.
- Nov 2, 2026Out Elbow
The Red Sox transferred Slaten (elbow) from the 15-day injured list to the 60-day IL on Tuesday, Gabrielle Starr of the Boston Herald reports.
ESPN / BOS
- Sep 29, 202660-Day-IL Elbow
The Red Sox transferred Slaten (elbow) from the 15-day injured list to the 60-day IL on Tuesday, Gabrielle Starr of the Boston Herald reports.
ESPN / BOS
- Sep 29, 202660-Day-IL Elbow
The Red Sox transferred Slaten (elbow) to the 60-day injured list Tuesday, Gabrielle Starr of the Boston Herald reports.
ESPN / BOS
- Sep 15, 202615-Day-IL Elbow
Interim manager Chad Tracy said Tuesday that Slaten (elbow) will not return from the injured list this season, Chris Cotillo of MassLive.com reports.
ESPN / BOS
Show all 8 reports
- Sep 7, 202615-Day-IL Elbow
Interim manager Chad Tracy said Monday that Slaten (elbow) has been shut down from throwing, Gabrielle Starr of the Boston Herald reports.
ESPN / BOS
- Aug 21, 202615-Day-IL Elbow
Slaten is dealing with right elbow inflammation and has been placed on the 15-day injured list.
sdio / BOS
- Aug 16, 202615-Day-IL Elbow
The Red Sox placed Slaten (elbow) on the 15-day injured list Sunday.
ESPN / BOS
- Aug 16, 202615-Day-IL Elbow
The Red Sox placed Slaten on the 15-day injured list Sunday.
ESPN / BOS
Sources and updates
Stats, scores and injury reports come from Agatha's own records: the SABR Lahman Baseball Database for the seasons through 2025, MLB's own box scores, its transactions and ESPN's injury reports.
Updated Nov 3, 2026, 7:36 PM ET. Results and form refresh after every game; biography facts are checked weekly.