Justin Slaten
#63 P · B/T: R/R · 6' 4", 222 lb · Age 28 · Longview, TX, USA · MLB debut 2024 · Draft: 2019 Rd 3 #86 (TEX) — New Mexico · Boston Red Sox
Career Graph
Pitching
| Season | Team | W | L | SV | G | GS | QS | IP | IP/G | SO | K/9 | BB/9 | ERA | FIP | WAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2024 | BOS | 6 | 2 | 2 | 44 | 0 | — | 55.1 | 1.3 | 58 | 9.4 | 1.5 | 2.93 | — | — |
| 2025 | BOS | 2 | 4 | 3 | 36 | 0 | 0 | 34.0 | 0.9 | 25 | 6.6 | 2.6 | 4.24 | 3.69 | 0.4 |
| 2026 | BOS | 2 | 4 | 0 | 34 | 0 | 0 | 29.2 | 0.9 | 38 | 11.5 | 1.8 | 4.55 | 3.02 | 0.5 |
| 2026 pace | 3 | 6 | 0 | 48 | 0 | 41.2 | 53 | ||||||||
| Career | 10 | 10 | 5 | 114 | 0 | 0 | 119.0 | 1.0 | 121 | 9.2 | 1.9 | 3.71 | — | 0.9 |
| Season | Team | W | L | SV | G | GS | QS | IP | IP/G | SO | K/9 | BB/9 | ERA |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Triple-A (AAA) | |||||||||||||
| 2023 | RR | 1 | 0 | 0 | 5 | 0 | — | 8.1 | 1.7 | 10 | 10.8 | 4.3 | 1.08 |
| 2025 | WOR | 1 | 0 | 0 | 3 | 0 | 0 | 3.0 | 1.0 | 5 | 15.0 | 3.0 | 0.00 |
| 2026 | WOR | 0 | 0 | 0 | 1 | 1 | — | 1.0 | 1.0 | 2 | 18.0 | 9.0 | 0.00 |
| AAA Total | 2 | 0 | 0 | 9 | 1 | 0 | 12.1 | 1.4 | 17 | 12.4 | 4.4 | 0.73 | |
| Double-A (AA) | |||||||||||||
| 2022 | FRI | 1 | 6 | 0 | 25 | 5 | — | 50.2 | 2.0 | 64 | 11.4 | 8.5 | 6.93 |
| 2023 | FRI | 4 | 3 | 2 | 35 | 1 | — | 51.1 | 1.5 | 76 | 13.3 | 2.8 | 3.16 |
| 2024 | POR | 0 | 0 | 0 | 1 | 0 | — | 0.1 | 0.3 | 1 | 27.0 | 27.0 | 27.00 |
| 2026 | POR | 0 | 0 | 0 | 1 | 1 | — | 1.0 | 1.0 | 2 | 18.0 | 0.0 | 0.00 |
| AA Total | 5 | 9 | 2 | 62 | 7 | — | 103.1 | 1.7 | 143 | 12.5 | 5.7 | 5.05 | |
| High-A (A+) | |||||||||||||
| 2021 | HIC | 4 | 8 | 0 | 20 | 19 | — | 82.1 | 4.1 | 110 | 12.0 | 3.4 | 6.01 |
| A+ Total | 4 | 8 | 0 | 20 | 19 | — | 82.1 | 4.1 | 110 | 12.0 | 3.4 | 6.01 | |
| Rookie (Rk) | |||||||||||||
| 2019 | A-RAN | 0 | 0 | 0 | 1 | 0 | — | 1.0 | 1.0 | 1 | 9.0 | 0.0 | 0.00 |
| 2022 | A-RAN | 0 | 0 | 0 | 1 | 0 | — | 1.0 | 1.0 | 2 | 18.0 | 0.0 | 0.00 |
| Rk Total | 0 | 0 | 0 | 2 | 0 | — | 2.0 | 1.0 | 3 | 13.5 | 0.0 | 0.00 | |
| Minors Total | 11 | 17 | 2 | 93 | 27 | 0 | 200.0 | 2.2 | 273 | 12.3 | 4.6 | 5.13 | |
Fielding
| Season | Team | Pos | G | Inn | PO | A | E | FPCT |
|---|---|---|---|---|---|---|---|---|
| 2026 | BOS | P | 34 | 29.2 | 2 | 1 | 1 | .750 |
| Career | P | 34 | 29.2 | 2 | 1 | 1 | .750 |
| Season | Team | Pos | G | Inn | PO | A | E | FPCT |
|---|---|---|---|---|---|---|---|---|
| Triple-A (AAA) | ||||||||
| 2023 | RR | P | 5 | 8.1 | 0 | 0 | 0 | .000 |
| 2025 | WOR | P | 3 | 3.0 | 0 | 0 | 0 | .000 |
| 2026 | WOR | P | 1 | 1.0 | 0 | 0 | 0 | .000 |
| AAA Total | — | 9 | 12.1 | 0 | 0 | 0 | — | |
| Double-A (AA) | ||||||||
| 2022 | FRI | P | 25 | 50.2 | 2 | 9 | 0 | 1.000 |
| 2023 | FRI | P | 35 | 51.1 | 6 | 6 | 0 | 1.000 |
| 2024 | POR | P | 1 | 0.1 | 0 | 0 | 0 | .000 |
| 2026 | POR | P | 1 | 1.0 | 0 | 0 | 0 | .000 |
| AA Total | — | 62 | 103.1 | 8 | 15 | 0 | 1.000 | |
| High-A (A+) | ||||||||
| 2021 | HIC | P | 20 | 82.1 | 1 | 4 | 0 | 1.000 |
| A+ Total | — | 20 | 82.1 | 1 | 4 | 0 | 1.000 | |
| Rookie (Rk) | ||||||||
| 2019 | A-RAN | P | 1 | 1.0 | 0 | 0 | 0 | .000 |
| 2022 | A-RAN | P | 1 | 1.0 | 0 | 0 | 0 | .000 |
| Rk Total | — | 2 | 2.0 | 0 | 0 | 0 | — | |
| Minors Total | — | 93 | 200.0 | 9 | 19 | 0 | 1.000 | |
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