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Justin Slaten
Justin Slaten
Boston Red Sox • Pitcher
Age 29 • 6' 4" • 222 lb
Bats: R • Throws: R
MLB Debut: 2024-03-30
Born: Longview , TX • USA
Draft: 2019
2026 Stats
W
2
L
4
ERA
4.60
WHIP
1.37
IP
31.1
SO
39
SV
0
HLD
17
G
36
GS
0
Career Stats
W
10
L
10
ERA
3.73
WHIP
1.13
IP
120.2
SO
122
SV
5
HLD
37
G
116
GS
0
Year-by-Year Pitching
Year Team GGSIP WLSVSO ERAWHIPAwards
2024 BOS 44 — 55.1 6 2 2 58 2.93 1.01
2025 BOS 36 — 34.0 2 4 3 25 4.24 1.09
2026 BOS 36 — 31.1 2 4 — 39 4.60 1.37
Spring Training
Pitching
YearTeamGGSIPWLSVSOERAWHIP
2024 BOS 6—6.1 ———6 0.000.47
2025 BOS 5—4.2 ———4 3.861.29
2026 BOS 7—6.2 ———7 5.401.35
Postseason
Pitching
YearTeamGGSIPWLSVSOERAWHIP
2025 BOS 2—2.0 ———1 4.501.00
Game Logs
Season selector loads one year at a time.
Pitching
Date Opponent IP H R ER BB SO HR
2026-08-12 @ TOR 1.0 0 0 0 1 1 0
2026-08-08 vs ATH 0.2 1 1 1 1 0 0
2026-08-06 vs CWS 1.0 3 2 1 0 2 0
2026-08-02 @ LAD 0.1 0 0 0 0 0 0
2026-08-01 @ LAD 1.0 0 0 0 0 1 0
2026-07-29 @ ATH 1.0 1 0 0 0 1 0
2026-07-27 @ ATH 0.2 0 0 0 0 0 0
2026-07-26 vs TOR 1.0 0 0 0 0 1 0
2026-07-22 vs BAL 1.1 1 0 0 0 1 0
2026-07-17 vs TB 1.0 0 0 0 0 1 0
2026-07-11 @ NYM 0.2 1 0 0 1 2 0
2026-07-09 @ CWS 1.0 0 0 0 0 1 0
2026-07-07 @ CWS 0.2 0 0 0 0 2 0
2026-07-05 @ LAA 1.0 2 1 1 0 1 0
2026-06-30 vs WSH 0.2 2 1 1 0 2 0
2026-06-28 vs NYY 1.0 1 2 0 0 1 0
2026-06-27 vs NYY 0.2 0 0 0 0 2 0
2026-06-24 @ COL 1.0 4 2 2 0 1 0
2026-06-23 @ COL 1.0 1 0 0 0 0 0
2026-06-19 @ SEA 0.1 0 0 0 0 1 0
2026-06-18 vs TOR 1.0 2 0 0 0 1 0
2026-06-13 vs TEX 1.0 1 0 0 0 1 0
2026-06-10 @ TB 0.2 3 2 2 0 0 1
2026-06-07 @ NYY 0.2 3 4 4 1 2 1
2026-06-05 @ NYY 1.0 0 0 0 0 0 0
2026-05-30 @ CLE 1.1 1 0 0 1 2 0
2026-05-22 vs MIN 0.2 4 4 4 1 1 2
2026-05-19 @ KC 1.0 0 0 0 0 2 0
2026-05-18 @ KC 1.0 0 0 0 0 2 0
2026-05-14 vs PHI 0.2 1 0 0 0 1 0
2026-05-13 vs PHI 1.0 1 0 0 0 0 0
2026-05-10 vs TB 1.0 0 0 0 0 1 0
2026-04-04 vs SD 1.0 1 0 0 0 1 0
2026-04-03 vs SD 1.0 0 0 0 0 1 0
2026-03-28 @ CIN 0.1 1 1 0 1 1 0
2026-03-26 @ CIN 1.0 0 0 0 1 2 0
Transactions
Entire history • newest first.
2026-09-29
Boston Red Sox transferred RHP Justin Slaten from the 15-day injured list to the 60-day injured list. Right elbow inflammation.
2026-08-16
Boston Red Sox placed RHP Justin Slaten on the 15-day injured list retroactive to August 13, 2026. Right elbow inflammation.
2026-05-09
Boston Red Sox activated RHP Justin Slaten from the 15-day injured list.
2026-05-06
Boston Red Sox sent RHP Justin Slaten on a rehab assignment to Worcester Red Sox.
2026-05-06
Boston Red Sox sent RHP Justin Slaten on a rehab assignment to Worcester Red Sox.
2026-05-03
Boston Red Sox sent RHP Justin Slaten on a rehab assignment to Portland Sea Dogs.
2025-08-28
Boston Red Sox activated RHP Justin Slaten from the 60-day injured list.
2025-08-19
Boston Red Sox sent RHP Justin Slaten on a rehab assignment to Worcester Red Sox.
2025-08-19
Boston Red Sox sent RHP Justin Slaten on a rehab assignment to Worcester Red Sox.
2025-06-28
Boston Red Sox transferred RHP Justin Slaten from the 15-day injured list to the 60-day injured list.
2025-06-01
Boston Red Sox placed RHP Justin Slaten on the 15-day injured list retroactive to May 29, 2025. Right shoulder inflammation.
2025-04-16
RHP Justin Slaten changed number to 63.
2025-04-15
RHP Justin Slaten changed number to 42.
2024-08-26
Boston Red Sox activated RHP Justin Slaten from the 15-day injured list.
2024-08-23
Boston Red Sox sent RHP Justin Slaten on a rehab assignment to Portland Sea Dogs.
2024-07-12
Boston Red Sox placed RHP Justin Slaten on the 15-day injured list retroactive to July 9, 2024. Right elbow inflammation.
2023-12-06
New York Mets traded RHP Justin Slaten to Boston Red Sox for LHP Ryan Ammons.
2023-12-06
New York Mets drafted RHP Justin Slaten.
2019-06-12
Texas Rangers signed RHP Justin Slaten.
Scouting Report
Statcast-style percentiles • Basenerd theme
Season 2026
Ready
Basic Line
Season / Game
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Pitch Arsenal
Usage • Velo • Break • Spin • xwOBA
Pitch N Use% Velo HB IVB Spin xwOBA Whiff% Zone% Chase% BNStuff+ BNCtrl+
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Notes
Primary pitch summary
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Movement Profile (Induced Break)
Pitcher's View: HB vs Rise / Drop (in)
Circles: 12/18/24 in • Dots = pitch types (size ~ pitch count)
Pitch Location Heatmaps
KDE-style blur • fixed zone • catcher POV
vs. LHH
vs. RHH
Zone: left -0.7083 / right 0.7083 • bot 1.595 / top 3.394 • Domain: X [-2,2], Z [0,5]
Statcast Game Log
Per-game pitch metrics from Statcast
Date Pitches Velo BNStuff+ BNCtrl+ Whiff% Zone% Chase% K% BB% xwOBA
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