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Justin Slaten

Red Sox Career team 2024 to 2026
Number #63
Position RP
Bats R
Throws R
Age 29
Height 6' 4"
Weight 222 lbs
Birth Place Longview, TX
Born Sep 15, 1997

Key Insights

2026
This is the pitch he goes to when he needs the out

With two strikes Slaten goes to the 4-seam fastball: 42% of his two-strike pitches, against 22.6% the rest of the time.

150 two-strike pitches in 2026.
One pitch of his moves in a way hitters rarely see

Slaten's 4-seam fastball carries 16.2 inches of ride against a spinless ball, the biggest vertical move in his arsenal.

144 thrown, averaging 96.6 mph.
When he falls behind, hitters know exactly what is coming

Behind in the count Slaten throws a fastball 92.4% of the time, against 67.1% when he is ahead.

119 pitches behind in the count, 167 ahead.
One pitch of his runs sideways more than almost anyone's

Slaten's sweeper moves 14.1 inches toward the first-base side, the biggest horizontal move in his arsenal.

84 thrown, averaging 86.0 mph.
There is one pitch of his that keeps getting hit

Contact off Slaten's 4-seam fastball leaves the bat at 88.7 mph, against 84.5 off his sinker.

144 and 54 of them thrown.
He works one part of the zone far more than the rest

Slaten lives at the bottom of the zone: his average pitch crosses at 2.25 feet, against a zone that runs 1.5 to 3.5.

508 located pitches in 2026.

Movement Profile (Induced Break)

Catcher's Perspective • Pitch movement relative to a spinless ball

Player Bio Data
DOB Sep 15, 1997
Birth Place Longview, TX
Height 6' 4"
Weight 222 lbs LBS
Bats/Throws R/R
College/Draft New Mexico