Armside

Justin Slaten

BOS · RHP · RP · Age 28

Season
2026
G/GS
36/0
IP
31.1
BF
137
xwOBA
.266
K%
28.5%
BB%
5.8%
CSW%
29.1%
Whiff%
25.2%
Barrel%
4.4%
FB Velo
96.8

Below the qualifying minimum; percentiles rank qualified players only.

Percentile profile, 2026 regular season.

Justin SlatenPercentile profile · 2026 regular seasonAmong qualified pitchers · red is better, blue is worsexwOBA91.266xBA75.223xSLG85.331Avg EV6188.3HardHit%6436.7%Barrel%934.4%K%8728.5%BB%915.8%Whiff%4925.2%Chase%7833.3%Armside · Data: MLB Advanced Media / Baseball Savant

Arsenal, 2026

Pitchⓘ#ⓘUsageⓘVeloⓘSpinⓘIVBⓘHBⓘWhiff%ⓘCSW%ⓘxwOBAⓘRVⓘRV/100ⓘ
Cutter FC21141.5%93.625209.14.118.6%32.7%.375-4-1.7
4-Seam Fastball FF12825.2%96.6246417.2-1.620.8%20.3%.244-2-1.2
Sweeper ST8717.1%86.126302.013.943.9%28.7%.1580-0.3
Sinker SI6512.8%97.3238014.8-11.326.5%32.3%.27323.8

Pitch types with 25+ pitches; knuckle curves and slow curves shown as curveballs. Grey rates: under 405 pitches of the type (Savant’s qualifying line, 2.5 per team game).

Season by season

SeasonⓘTeamⓘAgeⓘGⓘGSⓘIPⓘBFⓘK%ⓘBB%ⓘK−BB%ⓘCSW%ⓘxwOBAⓘFB Veloⓘ
2024BOS2644055.122425.9%4.0%21.9%29.3%.28496.4
2025BOS2736034.013718.2%7.3%10.9%27.9%.29296.7
2026BOS2836031.113728.5%5.8%22.6%29.1%.26696.8
Career——1160120.249824.5%5.4%19.1%28.9%.28196.6