Justin Slaten
P | Bats/Throws: R/R | 6' 4" 222LBS | Age: 27
Draft: 2019 | Rd: 3, #86, Texas Rangers | New Mexico
W L ERA G GS SV IP SO WHIP
2024 6 2 2.93 44 0 2 55.1 58 1.01
2025 1 4 3.47 24 0 3 23.1 16 0.90
2 Seasons 7 6 3.09 68 0 5 78.2 74 0.98
G W-L ERA IP SO WHIP
2024 44 6-2 2.93 55.1 58 1.01
2025 24 1-4 3.47 23.1 16 0.90
2 Seasons 68 7-6 3.09 78.2 74 0.98
MLB Percentile Rankings
Movement Profile (Induced Break)
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Statcast Statistics

Season Age Pitches Batted
Balls
Barrels Barrel % Barrel/PA Exit
Velocity
Max EV Launch
Angle
LA Sweet-
Spot %
XBA XSLG WOBA XWOBA XWOBACON HardHit% K% BB% ERA xERA
2024 26 811 155 6 3.9 2.7 87.8 112.2 8.6 30.3 .233 .347 .253 .278 .353 36.8 25.9 4.0 2.93 3.19
2025 27 333 67 4 6.0 4.4 89.5 111.8 11.8 31.3 .214 .342 .203 .261 .291 34.3 17.8 7.8 3.47 2.51
Player 1144 222 10 4.5 3.2 88.3 112.2 9.6 30.6 .228 .346 .239 .274 .334 36.0 23.6 5.1
MLB 7.1 4.8 88.5 122.9 12.4 33.2 .245 .405 .316 .315 .369 36.7 22.2 8.4
! Note: All figures in this table cover the period 2015-present.

Statcast Pitch Arsenal

Slaten relies on 4 pitches.
Four Seamer
(35.4%) ,
Cutter
(34.8%) ,
Curveball
(21.6%) ,
Sweeper
(8.1%) ,


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Pitch Tracking



Batted Ball Profile

AIR: Fly Balls + Line Drives + Popups All Batted Balls Batted Ball Breakdown
Season GB % AIR % FB % LD % PU % Pull % Straight % Oppo % Pull GB % Straight GB % Oppo GB % Pull AIR % Straight AIR % Oppo AIR %
2024 50.3 49.7 19.4 22.6 7.7 42.6 36.8 20.6 31.0 13.5 5.8 11.6 23.2 14.8
2025 40.3 59.7 28.4 22.4 9.0 40.3 35.8 23.9 28.4 9.0 3.0 11.9 26.9 20.9
Player 47.3 52.7 22.1 22.5 8.1 41.9 36.5 21.6 30.2 12.2 5.0 11.7 24.3 16.7
MLB 44.4 55.6 23.9 24.7 7.1 37.2 37.4 25.2 20.6 17.7 5.9 16.6 19.7 19.3
! Note: All figures in this table cover the period 2015-present.

Quality of Contact

Season Weak % Topped % Under % Flare/Burner % Solid % Barrel % Barrel/PA
2024 5.2 35.5 21.3 27.1 7.1 3.9 2.7
2025 1.5 37.3 31.3 17.9 6.0 6.0 4.4
Player 4.1 36.0 24.3 24.3 6.8 4.5 3.2
MLB 3.9 32.6 24.9 24.4 5.9 7.1 4.8
! Note: All figures in this table cover the period 2015-present.

Pitch Movement


How this works: This section shows two different ways to evaluate pitch movement. On the left, “Total Movement” shows the real-world movement of a pitch, including the forces of gravity, which affects every pitch thrown. Since gravity requires time, and slower pitches aren't 'better' just because they have more time to move, a pitch's movement is compared to other pitches of the same pitch type, within +/- 2 MPH and +/- 0.5 feet of extension/release. On the right, Induced Movement (or IVB) is reported without gravity, and attempts to isolate movement created by the pitcher's ability to spin and manipulate the ball.
Total Movement (in inches, w/ gravity)Induced Movement (in inches, w/o gravity)
YearPitchTeamHand#MPHVertical
Drop
vs.
Comparable
Horizontal
Break
vs.
Comparable
Vertical
Break
vs. AvgHorizontal
Break
vs. Avg
2025 Cutter BOS R 116 92.8 24.0 -2.0 4.6GLV 2.7 7.7 -0.7 4.6GLV 2.3
2025 Sweeper BOS R 27 85.2 38.4 1.3 15.0GLV 2.2 -0.4 1.7 15.0GLV 1.0
2025 Curveball BOS R 72 84.8 54.8 6.5 5.5GLV -1.3 -16.3 6.5 5.5GLV -3.9
2025 4-Seam Fastball BOS R 118 97.0 10.5 2.4 2.9ARM -4.5 18.7 2.8 2.9ARM -4.8
2024 Curveball BOS R 68 84.3 54.6 7.1 6.0GLV -0.5 -15.8 5.8 6.0GLV -3.4
2024 4-Seam Fastball BOS R 237 96.4 10.4 2.7 5.4ARM -1.7 19.1 3.4 5.4ARM -2.2
2024 Sweeper BOS R 200 84.0 38.7 1.0 12.1GLV -1.2 0.1 1.4 12.1GLV -2.0
2024 Cutter BOS R 306 91.5 25.0 -1.3 4.4GLV 1.8 7.6 -0.7 4.4GLV 1.7
! Note: Years are in reverse order.

Run Values by Pitch Type

Year Pitch Type Team RV/100 Run Value Pitches % PA BA SLG wOBA Whiff% K% PutAway % xBA xSLG xwOBA Hard Hit %
2025 4-Seam Fastball 1.0 1 118 35.4 29 .160 .200 .264 25.4 20.7 14.3 .151 .240 .240 42.1
2025 Cutter 5.8 7 116 34.8 32 .161 .161 .141 17.5 6.3 28.6 .251 .421 .278 26.7
2025 Curveball -1.7 -1 72 21.6 17 .250 .438 .318 33.3 23.5 11.4 .274 .401 .316 41.7
2025 Sweeper 3.3 1 27 8.1 10 .100 .200 .125 43.8 40.0 30.8 .161 .260 .181 33.3
2024 Cutter 1.4 4 306 37.7 80 .247 .351 .298 24.1 15.0 28.6 .283 .398 .312 46.2
2024 4-Seam Fastball 2.3 5 237 29.2 58 .151 .170 .206 26.6 31.0 23.1 .158 .224 .212 22.9
2024 Sweeper -1.1 -2 200 24.7 66 .279 .459 .352 35.6 27.3 24.7 .257 .433 .332 31.1
2024 Curveball 2.0 1 68 8.4 20 .150 .150 .135 42.3 50.0 25.0 .169 .213 .165 50.0
! Note: Years are in reverse order.
! Note: To better align with other values, positive numbers (red) are good, and negative numbers (blue) are poor.

Spin Direction

Year Pitch Type Pitches MPH Active Spin % Total Movement (In.) Spin-Based Observed Deviation
2025 Curveball 71 84.8 80 20.0 6:45 6:30 15
2025 Cutter 116 92.8 52 8.6 11:30 10:45 45
2025 4-Seam Fastball 118 97.0 88 18.6 12:30 12:15 15
2025 Sweeper 26 85.1 53 16.2 8:00 8:45 -45
2024 Curveball 68 84.3 78 19.6 6:45 6:30 15
2024 Cutter 305 91.5 52 8.4 11:30 10:45 45
2024 4-Seam Fastball 236 96.4 96 19.6 12:45 12:30 15
2024 Sweeper 196 84.0 48 13.1 8:00 8:45 -45
! Note: Years are in reverse order.
! Note: This table is showing data from the PITCHER perspective.
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Pitcher Arm Angle

! Note: Data is available from 2020 through the present.
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Statcast Pitching Run Value

Runs
Year Team PA Pitches Heart Shadow Chase Waste All
2024 224 811 4 9 -3 -2 9
2025 88 333 7 3 -2 -1 8
Player 312 1,144 11 12 -4 11 16
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Plate Discipline

Season Pitches Zone % Zone Swing % Zone Contact % Chase % Chase Contact % Edge % 1st Pitch Strike % Swing % Whiff % Meatball % Meatball Swing %
2024 811 51.3 71.2 82.8 34.9 44.9 39.5 63.4 53.5 29.0 8.1 72.7
2025 333 53.8 70.9 81.1 31.8 55.1 44.4 56.2 52.9 26.1 7.8 80.8
Player 1,144 52.0 71.1 82.3 34.1 47.6 40.9 61.3 53.3 28.2 8.0 75.0
MLB 48.7 67.0 82.1 28.4 57.6 42.6 61.1 47.2 25.0 7.3 76.3
! Note: All figures in this table cover the period 2015-present.

Percentile Rankings

Year xwOBA /
xERA
xBA xSLG xISO xOBP Brl Brl% EV Hard
Hit%
K% BB% Whiff% Chase
Rate
FB
Velo
FB
Spin
CB
Spin
Extension
2024 84 58 76 86 88 96 96 76 67 72 97 76 97 86 84 71 77
2025 93 82 85 77 90 83 78 51 85 22 56 58 81 89 90 75 86
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Expected Home Runs

Adjusted

Year Team Avg HR Trot Actual HR xHR HR-xHR Doubters Mostly Gone No Doubters No Doubter %
2024 25.90 4 4.4 0 3 3 2 50.0
2025 29.75 1 1.1 0 2 1 0 0.0
Player 26.86 5 5.5 -1 5 4 2 40.0
Note: xHR tells how many of this pitcher's home runs allowed would have been out of other stadiums. The "Adjusted" view here accounts for different wall heights, distances and environmental effects using Statcast Park Factor data.
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Expected Home Runs by Park

Adjusted

Year HR
2024 4 4 4 4 4 4 5 4 4 3 5 4 6 3 4 3 4 3 4 6 5 6 7 5 3 5 4 5 5 4 4
2025 1 2 0 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 2 1 2 1 1 1 1 1 1 1
Player 5 6 4 5 5 5 6 5 5 4 6 5 8 4 5 4 5 4 5 7 6 8 8 7 4 6 5 6 6 5 5
Note: xHR tells how many of this pitcher's home runs allowed would have been out of other stadiums. The "Adjusted" view here accounts for different wall heights, distances and environmental effects using Statcast Park Factor data.
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Year to Year Changes

Metric 2024 +/-   2025
Fastball Velocity 93.6 1.4 95.0
Offspeed Velocity 0.0 0.0 0.0
Breaking Velocity 84.1 0.8 84.9
Exit Velocity 87.8 1.7 89.5
Launch Angle 8.6 3.2 11.8
Barrel % 3.9 2.1 6.0
Hard Hit % 36.8 -2.5 34.3
LA Sweet-Spot % 30.3 1.0 31.3
xBA .233 -0.019 .214
BA .223 -0.052 .171
xwOBA .278 -0.017 .261
wOBA .253 -0.050 .203
xSLG .347 -0.005 .342
SLG .318 -0.086 .232
K% 25.9 -8.1 17.8
BB% 4.0 3.8 7.8
Swing % 53.5 -0.6 52.9
Whiff% 29.0 -2.9 26.1
In Zone % 51.3 2.5 53.8
Out of Zone % 48.7 -2.5 46.2
Out of Zone Swing % 34.9 -3.1 31.8
First Pitch Swing % 37.9 -5.3 32.6
First Pitch Strike % 63.4 -7.2 56.2
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Statcast Fielder Positioning

vs RHHvs LHH
YearAlignment TypePAwOBAPATotal%PATotal%
2024 Shades 224 .253 119 5 4.2 105 71 67.6
2025 Shades 88 .203 45 1 2.2 43 31 72.1
! Note: Shifts are through the 2022 season, Shaded starting from the 2023 season, Shift: three or more infielders are on the same side of second base, Shade: positioned outside of their typical responsible slices of the field.
Learn more about how positioning is defined here

Pitch Tempo

Bases EmptyRunners On Base
SeasonTeamPitchesTempoFast %Slow %PitchesTempoFast %Slow %
2024 213 16.5 13.6% 0.5% 94 18.0 2.1% 0.0%
2025 85 15.6 41.2% 0.0% 53 16.6 15.1% 0.0%

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Pitch Distribution



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