Justin Slaten
Boston Red Sox · No. 63 · P

Justin Slaten

6' 4", 222 lbs·Age 28·Bats R / Throws R
↑ HotL5 games
Pitcher archetype· RP· CONTEXTUAL
Balanced ArsenalA deep, even arsenal without a single dominant tendency.2024–2026 · 1,664 pitches · 94.3 mph fastball
2026 · 27 G
5.40
ERA
1-4
W-L
23.3
IP
1.50
WHIP
32
SO
6
BB
12.3
K/9
0
SV
The Almanac's Take

AI-generated analysis coming soon.

Career Highs
2.93
Best ERA · 2024
6
Most W · 2024
58
Most K · 2024
1.01
Best WHIP · 2024
Career Arc · ERA
3 seasons
Statistical Comps
Last 10 Games
DateIPHERBBSOHRDec
Jul 17100010H
Jul 110.66710120H
Jul 9100010H
Jul 70.66700020H
Jul 5121010
Jun 300.66721020
Jun 28110010W
Jun 270.66700020H
Jun 24142010L
Jun 23110000

Career · Pitching

3 seasons
YearTeamGIPWLERAERA+SOWHIP
20244455.1622.93581.01
20253634.0244.24251.09
20262723.1145.40321.50
Career107112.2910115
Pitch Movement Map

Each pitch type this pitcher throws regularly, placed by how the ball moves — sideways break across, rise or drop down the side. Each dotted ring holds about the middle 85% of the league’s pitches of that type, so a cluster sitting outside its ring is movement most pitchers don’t have.

RHP · 1,658 pitches · 2024–2026
-24-12+12+24-24-12+12+24← GLOVE SIDEARM SIDE →HORIZONTAL BREAK (IN)INDUCED VERTICAL BREAK (IN)FCFFSTCUSI
FC · Cutter38.1% · 92.3 mph
FF · 4-Seam Fastball30.5% · 96.6 mph
ST · Sweeper19.2% · 84.6 mph
CU · Curveball10.3% · 84.6 mph
SI · Sinker2.0% · 97.2 mph

The dots — a sample of this pitcher’s regular-season pitches, placed by movement: left–right is horizontal break, up–down is induced vertical break (what the pitch does beyond gravity). The view is handedness-neutral — positive break is toward the pitcher’s arm side for lefties and righties alike, so every sinker runs right and every sweeper breaks left, whoever throws it.

The dotted rings — about the middle 85% of where each pitch type lands league-wide (a 2-standard-deviation spread), measured from 7.5 million regular-season pitches since 2015. A cluster sitting well outside its ring is movement most of the league doesn’t get. Spring training and the postseason are excluded.

Ask The Almanac about Justin Slaten.

Matchups, projections, comps — grounded in Lahman, Retrosheet, and Statcast.

Start a conversation →