P | San Francisco Giants
Bats/Throws: R/R | 6' 2" 212 lbs | Age: 30
Draft: 2018 | Rd. 31, No. 916, San Francisco Giants | Washington State
W L ERA G GS SV IP SO WHIP
2023 5 3 3.23 49 13 1 61.1 78 1.39
2024 10 4 1.91 76 1 10 80 99 0.85
2025 5 7 4.11 68 0 17 61.1 60 1.27
3 Seasons 20 14 2.98 193 14 28 202.2 237 1.14
G W-L ERA IP SO WHIP
2023 49 5-3 3.23 61.1 78 1.39
2024 76 10-4 1.91 80 99 0.85
2025 68 5-7 4.11 61.1 60 1.27
3 Seasons 193 20-14 2.98 202.2 237 1.14
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
2023 27 1079 159 7 4.4 2.7 85.1 108.4 10.9 32.7 .210 .313 .328 .272 .336 26.4 29.7 9.1 3.23 3.06
2024 28 1221 182 11 6.0 3.6 86.4 116.1 9.8 31.3 .193 .298 .233 .253 .327 30.2 32.1 5.8 1.91 2.63
2025 29 1018 180 9 5.0 3.4 87.0 112.5 5.9 31.1 .251 .364 .306 .303 .352 35.6 22.6 6.8 4.11 3.82
Player 3318 521 27 5.2 3.2 86.2 116.1 8.8 31.7 .217 .323 .286 .275 .338 30.9 28.3 7.2
MLB 7.2 4.9 88.6 122.9 12.4 33.3 .245 .404 .315 .315 .368 37.0 22.2 8.4
! Note: All figures in this table cover the period 2015-present.

Statcast Pitch Arsenal

Walker relies on 2 pitches.
Sinker
(62.5%) ,
Slider
(37.5%) ,


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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 %
2023 44.0 56.0 27.0 22.6 6.3 40.3 37.1 22.6 21.4 17.6 5.0 18.9 19.5 17.6
2024 46.2 53.8 23.1 24.2 6.6 35.2 40.1 24.7 17.6 22.0 6.6 17.6 18.1 18.1
2025 50.0 50.0 18.9 26.7 4.4 25.6 40.6 33.9 13.3 22.8 13.9 12.2 17.8 20.0
Player 46.8 53.2 22.8 24.6 5.8 33.4 39.3 27.3 17.3 20.9 8.6 16.1 18.4 18.6
MLB 44.2 55.8 24.0 24.7 7.1 37.4 37.4 25.1 20.6 17.6 5.9 16.7 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
2023 6.3 34.6 26.4 23.9 4.4 4.4 2.7
2024 8.2 33.5 25.8 22.0 4.4 6.0 3.6
2025 7.8 35.6 18.3 27.8 4.4 5.0 3.4
Player 7.5 34.5 23.4 24.6 4.4 5.2 3.2
MLB 4.0 32.4 24.9 24.4 5.9 7.2 4.9
! 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 Slider SF R 382 84.0 36.5 -0.7 15.3GLV 8.6 2.4 -0.7 15.3GLV 10.7
2025 Sinker SF R 636 95.9 26.5 2.3 16.8ARM 0.4 3.4 4.0 16.8ARM 1.7
2024 Slider SF R 546 83.9 36.4 -1.2 14.9GLV 8.8 2.6 -0.9 14.9GLV 10.1
2024 4-Seam Fastball SF R 7 94.5 22.0 -5.9 7.8ARM -1.2 8.7 -7.0 7.8ARM 0.2
2024 Sinker SF R 667 95.6 26.7 2.4 15.1ARM -1.0 3.3 3.9 15.1ARM 0.2
! 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 Sinker 0.8 5 636 62.5 164 .282 .349 .317 17.1 22.6 21.6 .270 .352 .307 40.7
2025 Slider -0.2 -1 382 37.5 100 .207 .414 .300 28.0 23.0 17.8 .220 .383 .297 26.9
2024 Sinker 1.8 12 667 54.7 162 .201 .264 .267 18.8 26.5 22.3 .213 .322 .280 37.3
2024 Slider 1.7 9 546 44.8 142 .157 .269 .206 38.0 38.7 26.6 .173 .274 .217 21.3
2024 4-Seam Fastball -9.8 -1 7 0.6 3 .000 .000 .467 100.0 33.3 25.0 -- -- .467 --
! 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 Sinker 610 96.0 78 17.8 1:45 2:45 -60
2025 Slider 381 84.0 53 16.3 8:30 9:00 -30
2024 Sinker 627 95.6 73 15.9 1:45 2:45 -60
2024 Slider 530 83.9 53 15.8 8:15 9:15 -60
! Note: Years are in reverse order.
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! 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
2023 263 1,078 2 3 -4 -3 -2
2024 307 1,221 15 14 -4 -5 20
2025 264 1,018 11 6 -7 -5 5
Player 834 3,317 27 24 -15 27 23
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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 %
2023 1,079 48.2 59.6 77.4 32.4 51.9 41.0 58.2 45.5 32.0 7.7 66.3
2024 1,221 53.4 60.7 80.6 29.2 49.4 43.4 63.8 46.0 28.6 9.5 68.1
2025 1,018 52.9 58.4 84.1 26.1 64.0 40.0 58.9 43.2 21.6 9.6 68.4
Player 3,318 51.6 59.7 80.7 29.4 54.2 41.6 60.5 45.0 27.7 9.0 67.7
MLB 48.9 67.0 82.5 28.4 58.0 42.7 61.1 47.3 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
2023 91 86 93 91 80 92 92 98 99 90 38 87 85 64 49 23
2024 96 94 95 91 93 77 81 94 98 94 84 74 54 76 58 21
2025 58 34 67 86 33 89 91 93 86 49 71 20 22 76 73 45
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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 %
2023 23.62 8 6.6 1 3 4 3 37.5
2024 26.33 5 6.1 -1 2 6 1 20.0
2025 24.34 4 4.4 0 1 5 1 25.0
Player 24.59 17 17.1 0 6 15 5 29.4
Note: xHR tells how many of this pitcher's batted balls 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
2023 8 5 7 8 7 7 7 6 8 6 7 8 5 6 7 7 6 7 7 7 6 5 8 7 5 6 7 6 6 7 7
2024 5 5 5 7 6 7 7 8 6 5 6 7 6 5 6 7 5 6 6 7 7 4 8 8 5 5 7 7 7 5 4
2025 4 6 3 4 4 5 4 4 5 3 4 6 5 6 4 4 4 4 5 6 4 3 6 5 3 3 4 4 5 4 5
Player 17 16 15 19 17 19 18 18 19 14 17 21 16 17 17 18 15 17 18 20 17 12 22 20 13 14 18 17 18 16 16
Note: xHR tells how many of this pitcher's batted balls 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

2025 +/-   2024 +/-   2023
Results
BA .254 +.075 .179 -.083 .262
xBA .251 +.058 .193 -.017 .210
OBP .326 +.075 .251 -.082 .333
xOBP .324 +.060 .264 -.025 .289
SLG .373 +.108 .265 -.156 .421
xSLG .364 +.066 .298 -.015 .313
ISO .119 +.033 .086 -.073 .159
xISO .113 +.008 .105 +.002 .103
BABIP .322 +.066 .256 -.100 .356
wOBA .306 +.073 .233 -.095 .328
xwOBA .303 +.050 .253 -.019 .272
wOBACON .356 +.062 .294 -.136 .430
xwOBACON .352 +.025 .327 -.009 .336
BACON .337 +.061 .276 -.113 .389
xBACON .334 +.036 .298 -.017 .315
Statcast Hit Metrics
Hard Hit % 35.6 +5.4 30.2 +3.8 26.4
Avg Exit Velocity 87.0 +0.6 86.4 +1.3 85.1
Launch Angle Sweet-Spot % 31.1 -0.2 31.3 -1.4 32.7
Barrel % 5.0 -1.0 6.0 +1.6 4.4
Avg Launch Angle 5.9 -3.9 9.8 -1.1 10.9
Statcast Bat Tracking
Bat Speed 70.6 +0.2 70.4 +0.1 70.3
Attack Angle -3° 10° -3° 13°
Ideal Attack Angle % 37.0 -3.4 40.4 -3.2 43.6
Attack Direction +5° -3° +5° -8°
Swing Path - Tilt 33° 34° 34°
Swing Length 7.1 -0.2 7.3 -0.3 7.6
Statcast Pitch Metrics
Fastball Velocity 95.9 +0.3 95.6 +0.8 94.8
Breaking Velocity 84.0 +0.1 83.9 +0.7 83.2
Offspeed Velocity 0.0 -- -- -- --
Batted Ball Results
Barrels 9 -2 11 +4 7
Popup % 4.4 -2.2 6.6 +0.3 6.3
Flyball % 18.9 -4.2 23.1 -3.9 27.0
Line Drive % 26.7 +2.5 24.2 +1.6 22.6
Groundball % 50.0 +3.8 46.2 +2.2 44.0
Pull % 25.6 -9.6 35.2 -5.1 40.3
Straight Away % 40.6 +0.5 40.1 +3.0 37.1
Opposite Field % 33.9 +9.2 24.7 +2.1 22.6
Weak Contact % 7.8 -0.4 8.2 +1.9 6.3
Pull Airball % 12.2 -5.4 17.6 -1.3 18.9
Topped Contact % 35.6 +2.1 33.5 -1.1 34.6
Under Contact % 18.3 -7.5 25.8 -0.6 26.4
Flare/Burner Contact % 27.8 +5.8 22.0 -1.9 23.9
Solid Contact % 4.4 0.0 4.4 0.0 4.4
HR/FB % 11.8 -0.1 11.9 -6.7 18.6
Popups 8 -4 12 +2 10
Flyballs 34 -8 42 -1 43
Line Drives 48 +4 44 +8 36
Groundballs 90 +6 84 +14 70
Plate Discipline
In Zone % 52.9 -0.5 53.4 +5.2 48.2
Out of Zone % 47.1 +0.5 46.6 -5.2 51.8
Edge % 40.0 -3.4 43.4 +2.4 41.0
Zone Swing % 58.4 -2.3 60.7 +1.1 59.6
Out of Zone Swing % 26.1 -3.1 29.2 -3.2 32.4
In Zone Contact % 84.1 +3.5 80.6 +3.2 77.4
Out of Zone Contact % 64.0 +14.6 49.4 -2.5 51.9
Whiff % 21.6 -7.0 28.6 -3.4 32.0
First Strike % 58.9 -4.9 63.8 +5.6 58.2
First Pitch Swing % 26.8 +2.4 24.4 -1.8 26.2
Swing % 43.2 -2.8 46.0 +0.5 45.5
Meatball Swing % 68.4 +0.3 68.1 +1.8 66.3
Meatball % 9.6 +0.1 9.5 +1.8 7.7
Zone Swing & Miss % 15.9 -3.5 19.4 -3.2 22.6
Out of Zone Swing & Miss % 36.0 -14.6 50.6 +2.5 48.1
In Zone 539 -113 652 +132 520
Out of Zone 479 -90 569 +11 558
Edge 407 -123 530 +88 442
In Zone Swings 315 -81 396 +86 310
Out of Zone Swings 125 -41 166 -15 181
In Zone Swing & Misses 50 -27 77 +7 70
Out of Zone Swing & Misses 45 -39 84 -3 87
Basic
Pitches 1,018 -203 1,221 +142 1,079
PA 266 -42 308 +45 263
AB 236 -43 279 +46 233
Hits 60 +10 50 -11 61
Singles 41 +4 37 -3 40
Doubles 14 +7 7 -6 13
Triples 1 0 1 +1 0
Home Runs 4 -1 5 -3 8
Walks 18 0 18 -6 24
Strikeouts 60 -39 99 +21 78
K% 22.6 -9.5 32.1 +2.4 29.7
BB% 6.8 +1.0 5.8 -3.3 9.1
HBP 8 -1 9 +7 2
Batted Balls 180 -2 182 +23 159
Number of Fastballs 636 -38 674 +139 535
Number of Offspeed 0 0 0 0 0
Number of Breaking 382 -164 546 +3 543
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Statcast Fielder Positioning

vs RHHvs LHH
YearAlignment TypePAwOBAPATotal%PATotal%
2023 Shades 263 .328 167 5 3.0 96 48 50.0
2024 Shades 304 .236 159 1 0.6 145 20 13.8
2025 Shades 264 .306 144 1 0.7 120 1 0.8
! 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 %
2023 300 15.3 35.3% 0.3% 197 17.6 13.2% 2.0%
2024 330 14.8 56.4% 0.3% 224 16.3 18.8% 0.4%
2025 273 14.7 57.1% 0.4% 205 16.0 22.4% 0.0%

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Pitch Distribution