P | San Francisco Giants
Bats/Throws: R/R | 6' 2" 215 lbs | Age: 30
Draft: 2018 | Rd. 31, No. 916, San Francisco Giants | Washington State
W L ERA G GS SV IP SO WHIP
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
2026 0 0 6.00 4 0 1 3 4 1.33
4 Seasons 20 14 3.02 197 14 29 205.2 241 1.14
G W-L ERA IP SO WHIP
2024 76 10-4 1.91 80 99 0.85
2025 68 5-7 4.11 61.1 60 1.27
2026 4 0-0 6.00 3 4 1.33
4 Seasons 197 20-14 3.02 205.2 241 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 .209 .316 .328 .273 .337 26.4 29.7 9.1 3.23 3.09
2024 28 1221 182 11 6.0 3.6 86.4 116.1 9.8 31.3 .191 .299 .233 .255 .331 30.2 32.1 5.8 1.91 2.60
2025 29 1018 180 9 5.0 3.4 87.0 112.5 5.9 31.1 .251 .368 .306 .305 .354 35.6 22.6 6.8 4.11 3.85
2026 30 61 7 1 14.3 7.7 80.7 107.4 15.7 28.6 .237 .438 .341 .351 .452 14.3 30.8 15.4 6.00 5.19
Player 3379 528 28 5.3 3.3 86.1 116.1 8.9 31.6 .216 .328 .287 .277 .343 30.7 28.4 7.3
MLB 7.2 4.9 88.6 122.9 12.4 33.3 .243 .408 .315 .316 .369 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
(63.9%) ,
Slider
(36.1%) ,


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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 %
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
2026 28.6 71.4 57.1 14.3 0.0 42.9 14.3 42.9 14.3 0.0 14.3 28.6 14.3 28.6
Player 46.6 53.4 23.3 24.4 5.7 33.5 39.0 27.5 17.2 20.6 8.7 16.3 18.4 18.8
MLB 44.2 55.8 24.1 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
2026 14.3 0.0 42.9 28.6 0.0 14.3 7.7
Player 7.6 34.1 23.7 24.6 4.4 5.3 3.3
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
2026 Sinker SF R 39 95.1 26.3 0.9 18.8ARM 1.7 4.2 3.6 18.8ARM 3.1
2026 Slider SF R 22 82.9 36.8 -2.7 17.2GLV 9.9 3.3 -1.8 17.2GLV 12.8
2025 Slider SF R 382 84.0 36.5 -0.9 15.3GLV 9.0 2.4 -0.6 15.3GLV 10.9
2025 Sinker SF R 636 95.9 26.5 2.3 16.8ARM 0.4 3.4 4.0 16.8ARM 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 %
2026 Sinker -0.1 0 39 63.9 7 .200 .200 .329 0.0 28.6 20.0 .250 .295 .372 0.0
2026 Slider -2.1 0 22 36.1 6 .167 .667 .333 25.0 33.3 22.2 .225 .557 .326 25.0
2025 Sinker 0.8 5 636 62.5 164 .282 .349 .317 17.1 22.6 21.6 .271 .361 .311 40.7
2025 Slider -0.2 -1 382 37.5 100 .207 .414 .300 28.0 23.0 17.8 .218 .381 .295 26.9
! 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
2026 Sinker 39 95.1 85 19.9 2:00 2:45 -45
2026 Slider 22 82.9 55 18.2 8:15 9:15 -60
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
! 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
2026 13 61 0 1 -1 0 -1
Player 847 3,378 27 25 -16 27 22
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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 41.1 58.2 45.5 32.0 7.8 66.7
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
2026 61 44.3 44.4 83.3 23.5 87.5 47.5 53.8 32.8 15.0 4.9 66.7
Player 3,379 51.5 59.4 80.7 29.3 54.8 41.7 60.4 44.8 27.5 8.9 67.8
MLB 48.9 67.0 82.5 28.4 58.0 42.7 61.1 47.3 25.0 7.4 76.3
! Note: All figures in this table cover the period 2015-present.

Percentile Rankings

Run Value Pitching
Year Pitching Fastball Breaking Off
Speed
xERA Fastball
MPH
Fastball
Spin
Curve
Spin
Avg
EV
Chase% Whiff% K% BB% Barrel% Hard-
Hit%
GB% Extension
2023 35 60 16 91 64 49 98 85 87 90 38 92 99 58 23
2024 93 90 94 96 76 58 94 54 74 94 84 81 98 71 21
2025 56 74 40 56 76 73 93 22 20 49 71 91 86 84 45
2026 30 43 24 30 96 19 10 68 17 19 93 19
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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
2026 23.07 1 1.0 0 0 1 0 0.0
Player 24.50 18 18.1 0 6 16 5 27.8
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
2026 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
Player 18 17 16 20 17 20 19 19 20 15 18 22 17 18 18 19 16 18 19 21 18 13 23 21 14 15 19 18 19 17 17
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

2026 +/-   2025 +/-   2024 +/-   2023
Results
BA .182 -.072 .254 +.075 .179 -.083 .262
xBA .237 -.014 .251 +.060 .191 -.018 .209
OBP .308 -.018 .326 +.075 .251 -.082 .333
xOBP .354 +.030 .324 +.062 .262 -.027 .289
SLG .455 +.082 .373 +.108 .265 -.156 .421
xSLG .438 +.070 .368 +.069 .299 -.017 .316
ISO .273 +.154 .119 +.033 .086 -.073 .159
xISO .202 +.085 .117 +.008 .109 +.002 .107
BABIP .167 -.155 .322 +.066 .256 -.100 .356
wOBA .341 +.035 .306 +.073 .233 -.095 .328
xwOBA .351 +.046 .305 +.050 .255 -.018 .273
wOBAcon .433 +.077 .356 +.062 .294 -.136 .430
xwOBAcon .452 +.098 .354 +.023 .331 -.006 .337
BACON .286 -.051 .337 +.061 .276 -.113 .389
xBACON .372 +.038 .334 +.039 .295 -.019 .314
Statcast Hit Metrics
Hard Hit % 14.3 -21.3 35.6 +5.4 30.2 +3.8 26.4
Avg Exit Velocity 80.7 -6.3 87.0 +0.6 86.4 +1.3 85.1
Launch Angle Sweet-Spot % 28.6 -2.5 31.1 -0.2 31.3 -1.4 32.7
Barrel % 14.3 +9.3 5.0 -1.0 6.0 +1.6 4.4
Avg Launch Angle 15.7 +9.8 5.9 -3.9 9.8 -1.1 10.9
Statcast Bat Tracking
Bat Speed 72.2 +1.6 70.6 +0.2 70.4 0.0 70.4
Attack Angle +2° -3° 10° -3° 12°
Ideal Attack Angle % 53.3 +16.3 37.0 -3.4 40.4 -2.9 43.3
Attack Direction +1° +5° -3° +5° -8°
Swing Path - Tilt 31° -2° 33° 34° 34°
Swing Length 7.3 +0.2 7.1 -0.2 7.3 -0.3 7.6
Statcast Pitch Metrics
Fastball Velocity 95.1 -0.8 95.9 +0.3 95.6 +0.8 94.8
Breaking Velocity 82.9 -1.1 84.0 +0.1 83.9 +0.7 83.2
Offspeed Velocity 0.0 -- -- -- -- -- --
Batted Ball Results
Barrels 1 -8 9 -2 11 +4 7
Popup % 0.0 -4.4 4.4 -2.2 6.6 +0.3 6.3
Flyball % 57.1 +38.2 18.9 -4.2 23.1 -3.9 27.0
Line Drive % 14.3 -12.4 26.7 +2.5 24.2 +1.6 22.6
Groundball % 28.6 -21.4 50.0 +3.8 46.2 +2.2 44.0
Pull % 42.9 +17.3 25.6 -9.6 35.2 -5.1 40.3
Straight Away % 14.3 -26.3 40.6 +0.5 40.1 +3.0 37.1
Opposite Field % 42.9 +9.0 33.9 +9.2 24.7 +2.1 22.6
Weak Contact % 14.3 +6.5 7.8 -0.4 8.2 +1.9 6.3
Pull Airball % 28.6 +16.4 12.2 -5.4 17.6 -1.3 18.9
Topped Contact % 0.0 -35.6 35.6 +2.1 33.5 -1.1 34.6
Under Contact % 42.9 +24.6 18.3 -7.5 25.8 -0.6 26.4
Flare/Burner Contact % 28.6 +0.8 27.8 +5.8 22.0 -1.9 23.9
Solid Contact % 0.0 -4.4 4.4 0.0 4.4 0.0 4.4
HR/FB % 25.0 +13.2 11.8 -0.1 11.9 -6.7 18.6
Popups 0 -8 8 -4 12 +2 10
Flyballs 4 -30 34 -8 42 -1 43
Line Drives 1 -47 48 +4 44 +8 36
Groundballs 2 -88 90 +6 84 +14 70
Plate Discipline
In Zone % 44.3 -8.6 52.9 -0.5 53.4 +5.2 48.2
Out of Zone % 55.7 +8.6 47.1 +0.5 46.6 -5.2 51.8
Edge % 47.5 +7.5 40.0 -3.4 43.4 +2.3 41.1
Zone Swing % 44.4 -14.0 58.4 -2.3 60.7 +1.1 59.6
Out of Zone Swing % 23.5 -2.6 26.1 -3.1 29.2 -3.2 32.4
In Zone Contact % 83.3 -0.8 84.1 +3.5 80.6 +3.2 77.4
Out of Zone Contact % 87.5 +23.5 64.0 +14.6 49.4 -2.5 51.9
Whiff % 15.0 -6.6 21.6 -7.0 28.6 -3.4 32.0
First Strike % 53.8 -5.1 58.9 -4.9 63.8 +5.6 58.2
First Pitch Swing % 7.7 -19.1 26.8 +2.4 24.4 -1.8 26.2
Swing % 32.8 -10.4 43.2 -2.8 46.0 +0.5 45.5
Meatball Swing % 66.7 -1.7 68.4 +0.3 68.1 +1.4 66.7
Meatball % 4.9 -4.7 9.6 +0.1 9.5 +1.7 7.8
Zone Swing & Miss % 16.7 +0.8 15.9 -3.5 19.4 -3.2 22.6
Out of Zone Swing & Miss % 12.5 -23.5 36.0 -14.6 50.6 +2.5 48.1
In Zone 27 -512 539 -113 652 +132 520
Out of Zone 34 -445 479 -90 569 +11 558
Edge 29 -378 407 -123 530 +87 443
In Zone Swings 12 -303 315 -81 396 +86 310
Out of Zone Swings 8 -117 125 -41 166 -15 181
In Zone Swing & Misses 2 -48 50 -27 77 +7 70
Out of Zone Swing & Misses 1 -44 45 -39 84 -3 87
Basic
Pitches 61 -957 1,018 -203 1,221 +142 1,079
PA 13 -253 266 -42 308 +45 263
AB 11 -225 236 -43 279 +46 233
Hits 2 -58 60 +10 50 -11 61
Singles 1 -40 41 +4 37 -3 40
Doubles 0 -14 14 +7 7 -6 13
Triples 0 -1 1 0 1 +1 0
Home Runs 1 -3 4 -1 5 -3 8
Walks 2 -16 18 0 18 -6 24
Strikeouts 4 -56 60 -39 99 +21 78
K% 30.8 +8.2 22.6 -9.5 32.1 +2.4 29.7
BB% 15.4 +8.6 6.8 +1.0 5.8 -3.3 9.1
HBP 0 -8 8 -1 9 +7 2
Batted Balls 7 -173 180 -2 182 +23 159
Number of Fastballs 39 -597 636 -38 674 +139 535
Number of Offspeed 0 0 0 0 0 0 0
Number of Breaking 22 -360 382 -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
2026 Shades 13 .341 8 5 62.5 5 4 80.0
! 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