Justin Slaten | Boston Red Sox
MLB Player
Justin Slaten
Boston Red SoxHeight6' 4"Weight222 lbsAge29Experience3rd Season
0SVTied-261st
4.60ERA
39KTied-390th
1.37WHIP
Player Information
PositionRelief Pitcher
Jersey#63
Date of Birth15/9/1997
BirthplaceLongview, TX
CollegeNew Mexico
Experience3rd Season
Draft2019: Rd 3, Pk 86 (TEX)
Bats / ThrowsRight/Right
MLB Debut2024
StatusInjured/60
Next Game
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Season, Postseason & Career
| Split | GP | GS | CG | SHO | IP | H | R | ER | HR | BB | K |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Career | 116 | 0 | 0 | 0 | 120.2 | 109 | 60 | 50 | 11 | 27 | 122 |
Pitching by Season
| Season | GP | GS | W | L | W% | WAR | ERA | WHIP | IP | K | BB | K/BB | H | R | ER | SV | HLD | BLSV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | 44 | 0 | 6 | 2 | .750 | 0.9 | 2.93 | 1.01 | 55.1 | 58 | 9 | 6.4 | 47 | 21 | 18 | 2 | 13 | 4 |
| 2025 | 36 | 0 | 2 | 4 | .333 | -0.2 | 4.24 | 1.09 | 34.0 | 25 | 10 | 2.5 | 27 | 19 | 16 | 3 | 7 | 3 |
| 2026 | 36 | 0 | 2 | 4 | .333 | -0.6 | 4.60 | 1.37 | 31.1 | 39 | 8 | 4.9 | 35 | 20 | 16 | 0 | 17 | 1 |
| Career | 116 | 0 | 10 | 10 | .500 | -- | 3.73 | 1.13 | 120.2 | 122 | 27 | 4.5 | 109 | 60 | 50 | 5 | 37 | 8 |
Postseason Pitching by Season
| Season | GP | GS | W | L | W% | WAR | ERA | WHIP | IP | K | BB | K/BB | H | R | ER | SV | HLD | BLSV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | 2 | 0 | 0 | 0 | .000 | 0.0 | 4.50 | 1.00 | 2.0 | 1 | 1 | 1.0 | 1 | 1 | 1 | 0 | 0 | 0 |
| Career | 2 | 0 | 0 | 0 | .000 | 0.0 | 4.50 | 1.00 | 2.0 | 1 | 1 | 1.0 | 1 | 1 | 1 | 0 | 0 | 0 |
Opponent Batting by Season
| Season | P | TBF | P-TBF | OBA | OOBP | OSLUG | OOPS | 2B | 3B | HR | TB | RBI | BH | SH | SF | IBB |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | 811 | 224 | 3.621 | .223 | .259 | .318 | .576 | 6 | 1 | 4 | 67 | 19 | 2 | 0 | 2 | 0 |
| 2025 | 499 | 137 | 3.642 | .214 | .270 | .310 | .580 | 3 | 0 | 3 | 39 | 16 | 0 | 0 | 1 | 2 |
| 2026 | 508 | 137 | 3.708 | .276 | .319 | .417 | .736 | 6 | 0 | 4 | 53 | 20 | 0 | 2 | 0 | 0 |
| Career | 1818 | 498 | 3.651 | .235 | .278 | .343 | .621 | 15 | 1 | 11 | 159 | 55 | 2 | 2 | 3 | 2 |
Expanded Pitching by Season
| Season | P/S | P/I | K/9 | QS | CG | SHO | GSC | GB | FB | G/F | IR | IRS | WP | BK | SB | CS | RSUP |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | 0.0 | 14.7 | 9.4 | 0 | 0 | 0 | 0.0 | 78 | 77 | 1.0 | 14 | 3 | 4 | 0 | 2 | 0 | 0.0 |
| 2025 | 0.0 | 14.7 | 6.6 | 0 | 0 | 0 | 0.0 | 42 | 60 | 0.7 | 15 | 2 | 1 | 0 | 2 | 0 | 0.0 |
| 2026 | 0.0 | 16.2 | 11.2 | 0 | 0 | 0 | 0.0 | 39 | 51 | 0.8 | 16 | 3 | 0 | 0 | 7 | 0 | 0.0 |
| Career | 0.0 | 15.1 | 9.1 | 0 | 0 | 0 | 0.0 | 159 | 188 | 0.8 | 45 | 8 | 5 | 0 | 11 | 0 | 0.0 |
Game Log
| Game | Result | IP | H | R | ER | HR | BB | K | GB | FB | P | TBF | GSC | Dec | Rel | ERA |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 @ TOR2026 Regular Season | L 6-4 | 1.0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 21 | 4 | 0.0 | - | - | 4.60 |
 vs ATH2026 Regular Season | L 7-3 | 0.2 | 1 | 1 | 1 | 0 | 1 | 0 | 1 | 2 | 14 | 4 | 0.0 | - | - | 4.75 |
 vs CHW2026 Regular Season | W 12-11 F/13 | 1.0 | 3 | 2 | 1 | 0 | 0 | 2 | 1 | 3 | 17 | 6 | 0.0 | - | - | 4.55 |
 @ LAD2026 Regular Season | W 8-4 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 5 | 1 | 0.0 | - | HLD(17) | 4.40 |
| @ LAD2026 Regular Season | W 3-2 | 1.0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 0 | 8 | 3 | 0.0 | W(2-4) | - | 4.45 |
| @ ATH2026 Regular Season | W 4-2 F/10 | 1.0 | 1 | 0 | 0 | 0 | 0 | 1 | 2 | 2 | 19 | 5 | 0.0 | - | - | 4.61 |
| @ ATH2026 Regular Season | W 4-2 | 0.2 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 5 | 2 | 0.0 | - | HLD(16) | 4.78 |
| vs TOR2026 Regular Season | W 6-1 | 1.0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 0 | 12 | 3 | 0.0 | - | HLD(15) | 4.91 |
 vs BAL2026 Regular Season | W 6-3 | 1.1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 3 | 19 | 5 | 0.0 | - | HLD(14) | 5.11 |
 vs TB2026 Regular Season | W 5-3 | 1.0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 0 | 12 | 3 | 0.0 | - | HLD(13) | 5.40 |
 @ NYM2026 Regular Season | W 4-0 | 0.2 | 1 | 0 | 0 | 0 | 1 | 2 | 0 | 1 | 17 | 4 | 0.0 | - | HLD(12) | 5.64 |
| @ CHW2026 Regular Season | W 2-1 | 1.0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 8 | 3 | 0.0 | - | HLD(11) | 5.82 |
| @ CHW2026 Regular SeasonWeek 27 | W 8-1 | 0.2 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 10 | 2 | 0.0 | - | HLD(10) | 6.10 |
 @ LAA2026 Regular SeasonWeek 27 | W 7-5 | 1.0 | 2 | 1 | 1 | 0 | 0 | 1 | 2 | 2 | 18 | 5 | 0.0 | - | - | 6.30 |
 vs WSH2026 Regular SeasonWeek 26 | L 8-1 | 0.2 | 2 | 1 | 1 | 0 | 0 | 2 | 1 | 1 | 13 | 4 | 0.0 | - | - | 6.16 |
 vs NYY2026 Regular SeasonWeek 26 | W 5-4 F/10 | 1.0 | 1 | 2 | 0 | 0 | 0 | 1 | 3 | 1 | 16 | 5 | 0.0 | W(1-4) | - | 5.89 |
| vs NYY2026 Regular SeasonWeek 26 | W 4-1 | 0.2 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 12 | 2 | 0.0 | - | HLD(9) | 6.23 |
 @ COL2026 Regular SeasonWeek 25 | L 8-6 | 1.0 | 4 | 2 | 2 | 0 | 0 | 1 | 1 | 5 | 19 | 7 | 0.0 | L(0-4) | - | 6.48 |
| @ COL2026 Regular SeasonWeek 25 | W 5-2 | 1.0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | 7 | 3 | 0.0 | - | - | 5.74 |
 @ SEA2026 Regular SeasonWeek 25 | W 6-2 | 0.1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 6 | 1 | 0.0 | - | HLD(8) | 6.14 |
| vs TOR2026 Regular SeasonWeek 25 | L 4-3 | 1.0 | 2 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 15 | 4 | 0.0 | - | - | 6.28 |
 vs TEX2026 Regular SeasonWeek 24 | W 6-3 | 1.0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 16 | 4 | 0.0 | - | - | 6.75 |
| @ TB2026 Regular SeasonWeek 23 | L 7-5 | 0.2 | 3 | 2 | 2 | 1 | 0 | 0 | 2 | 3 | 19 | 5 | 0.0 | - | - | 7.30 |
| @ NYY2026 Regular SeasonWeek 23 | L 6-1 | 0.2 | 3 | 4 | 4 | 1 | 1 | 2 | 0 | 3 | 25 | 6 | 0.0 | L(0-3) | - | 6.17 |
| @ NYY2026 Regular SeasonWeek 23 | W 5-3 | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 4 | 3 | 0.0 | - | HLD(7) | 3.27 |
 @ CLE2026 Regular SeasonWeek 22 | W 9-1 | 1.1 | 1 | 0 | 0 | 0 | 1 | 2 | 1 | 2 | 21 | 6 | 0.0 | - | HLD(6) | 3.60 |
 vs MIN2026 Regular SeasonWeek 21 | L 8-6 | 0.2 | 4 | 4 | 4 | 2 | 1 | 1 | 2 | 3 | 28 | 7 | 0.0 | L(0-2) | BLSV(1) | 4.15 |
 @ KC2026 Regular SeasonWeek 20 | W 7-1 | 1.0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 0 | 12 | 3 | 0.0 | - | HLD(5) | 0.00 |
| @ KC2026 Regular SeasonWeek 20 | W 3-1 | 1.0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 0 | 17 | 3 | 0.0 | - | HLD(4) | 0.00 |
 vs PHI2026 Regular SeasonWeek 20 | L 3-1 | 0.2 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 2 | 8 | 3 | 0.0 | - | - | 0.00 |
| vs PHI2026 Regular SeasonWeek 19 | W 3-1 | 1.0 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 14 | 4 | 0.0 | - | HLD(3) | 0.00 |
| vs TB2026 Regular SeasonWeek 19 | L 4-1 | 1.0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 15 | 3 | 0.0 | - | - | 0.00 |
 vs SD2026 Regular SeasonWeek 14 | L 3-2 | 1.0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 2 | 19 | 4 | 0.0 | - | - | 0.00 |
| vs SD2026 Regular SeasonWeek 14 | W 5-2 | 1.0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 9 | 3 | 0.0 | - | HLD(2) | 0.00 |
 @ CIN2026 Regular SeasonWeek 13 | L 6-5 F/11 | 0.1 | 1 | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 11 | 3 | 0.0 | L(0-1) | - | 0.00 |
| @ CIN2026 Regular SeasonWeek 13 | W 3-0 | 1.0 | 0 | 0 | 0 | 0 | 1 | 2 | 0 | 1 | 17 | 4 | 0.0 | - | HLD(1) | 0.00 |