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 3.00 12 0 3 12 12 1.33
4 Seasons 20 14 2.98 205 14 31 214.2 249 1.15
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 12 0-0 3.00 12 12 1.33
4 Seasons 205 20-14 2.98 214.2 249 1.15
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 .190 .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 30 205 33 2 6.1 3.9 83.1 107.4 3.2 30.3 .221 .343 .274 .280 .330 30.3 23.5 11.8 3.00 3.06
Player 3523 554 29 5.2 3.3 86.0 116.1 8.4 31.6 .216 .327 .286 .276 .340 30.9 28.0 7.4
MLB 7.2 4.9 88.6 122.9 12.4 33.3 .243 .408 .316 .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 3 pitches.
Sinker
(68.3%) ,
Slider
(31.2%) ,
Four Seamer
(0.5%) ,


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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
2026 48.5 51.5 36.4 12.1 3.0 30.3 45.5 24.2 15.2 24.2 9.1 15.2 21.2 15.2
Player 46.9 53.1 23.6 23.8 5.6 33.2 39.7 27.1 17.1 21.1 8.7 16.1 18.6 18.4
MLB 44.2 55.8 24.1 24.6 7.1 37.4 37.3 25.1 20.7 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 9.1 33.3 27.3 21.2 3.0 6.1 3.9
Player 7.6 34.5 23.6 24.4 4.3 5.2 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 140 95.4 26.5 1.3 18.1ARM 1.1 3.8 4.0 18.1ARM 2.5
2026 Slider SF R 64 82.8 37.4 -2.1 17.7GLV 10.5 2.6 -1.2 17.7GLV 13.5
2026 4-Seam Fastball SF R 1 95.5 19.0 -2.4 11.7ARM -0.1 11.1 -5.0 11.7ARM 4.0
2025 4-Seam Fastball SF R 2 95.1 27.8 -11.3 17.8ARM 7.8 2.5 -13.3 17.8ARM 10.2
2025 Sinker SF R 630 96.0 26.5 2.3 16.8ARM 0.4 3.4 4.0 16.8ARM 1.7
2025 Changeup SF R 4 91.3 28.6 -2.2 15.4ARM 0.0 4.4 -0.3 15.4ARM 0.9
2025 Slider SF R 382 84.0 36.5 -0.8 15.3GLV 9.0 2.4 -0.6 15.3GLV 11.0
! 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 1.0 1 140 68.3 29 .269 .308 .302 17.3 27.6 20.0 .222 .320 .281 38.9
2026 Slider -0.8 -1 64 31.2 20 .158 .316 .270 21.4 20.0 16.7 .220 .375 .277 20.0
2026 4-Seam Fastball -1.2 0 1 0.5 -- -- -- -- -- 0.0 -- -- -- --
2025 Sinker 1.0 6 630 61.9 162 .277 .345 .311 17.1 22.8 21.6 .270 .360 .307 41.1
2025 Slider -0.2 -1 382 37.5 100 .207 .414 .300 28.0 23.0 17.8 .217 .381 .295 26.9
2025 Changeup -6.0 0 4 0.4 -- -- -- -- -- -- -- -- -- --
2025 4-Seam Fastball -40.2 -1 2 0.2 2 1.000 1.000 .800 0.0 0.0 -- .446 .492 .558 0.0
! 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
2026 Sinker 140 95.4 84 19.1 1:45 2:45 -60
2026 Slider 64 82.8 57 18.7 8:15 9:00 -45
2025 Sinker 606 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 49 205 1 3 -3 -1 1
Player 883 3,522 28 27 -17 28 24
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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 205 52.2 54.2 86.2 22.4 68.2 42.0 66.0 39.0 18.8 9.8 70.0
Player 3,523 51.6 59.4 81.0 29.0 54.9 41.6 60.8 44.6 27.2 9.0 67.9
MLB 48.8 67.0 82.6 28.5 58.0 42.7 61.1 47.3 25.0 7.4 76.2
! 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 41 51 56 77 73 93 22 20 49 71 91 86 84 47
2026 56 72 35 77 66 77 98 7 14 56 30 67 86 70 41
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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 1.2 0 2 0 1 100.0
Player 24.50 18 18.3 0 8 15 6 33.3
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 2 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 3 1 1 1 1 1 1 1 1 2 1 1
Player 18 18 16 20 18 20 19 19 20 15 18 23 17 18 18 19 16 18 19 23 18 13 23 21 14 15 19 18 20 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 .222 -.032 .254 +.075 .179 -.083 .262
xBA .221 -.030 .251 +.061 .190 -.019 .209
OBP .314 -.012 .326 +.075 .251 -.082 .333
xOBP .313 -.011 .324 +.062 .262 -.027 .289
SLG .311 -.062 .373 +.108 .265 -.156 .421
xSLG .343 -.025 .368 +.069 .299 -.017 .316
ISO .089 -.030 .119 +.033 .086 -.073 .159
xISO .122 +.005 .117 +.008 .109 +.002 .107
BABIP .281 -.041 .322 +.066 .256 -.100 .356
wOBA .274 -.032 .306 +.073 .233 -.095 .328
xwOBA .280 -.025 .305 +.050 .255 -.018 .273
wOBAcon .321 -.035 .356 +.062 .294 -.136 .430
xwOBAcon .330 -.024 .354 +.023 .331 -.006 .337
BACON .303 -.034 .337 +.061 .276 -.113 .389
xBACON .302 -.032 .334 +.040 .294 -.020 .314
Statcast Hit Metrics
Hard Hit % 30.3 -5.3 35.6 +5.4 30.2 +3.8 26.4
Avg Exit Velocity 83.1 -3.9 87.0 +0.6 86.4 +1.3 85.1
Launch Angle Sweet-Spot % 30.3 -0.8 31.1 -0.2 31.3 -1.4 32.7
Barrel % 6.1 +1.1 5.0 -1.0 6.0 +1.6 4.4
Avg Launch Angle 3.2 -2.7 5.9 -3.9 9.8 -1.1 10.9
Statcast Bat Tracking
Bat Speed 69.8 -0.8 70.6 +0.2 70.4 0.0 70.4
Attack Angle -2° -3° 10° -3° 12°
Ideal Attack Angle % 42.4 +5.4 37.0 -3.4 40.4 -2.9 43.3
Attack Direction +6° +5° -3° +5° -8°
Swing Path - Tilt 33° 33° 34° 34°
Swing Length 7.0 -0.1 7.1 -0.2 7.3 -0.3 7.6
Statcast Pitch Metrics
Fastball Velocity 95.4 -0.6 96.0 +0.4 95.6 +0.8 94.8
Breaking Velocity 82.8 -1.2 84.0 +0.1 83.9 +0.7 83.2
Offspeed Velocity 0.0 -- 91.3 -- -- -- --
Batted Ball Results
Barrels 2 -7 9 -2 11 +4 7
Popup % 3.0 -1.4 4.4 -2.2 6.6 +0.3 6.3
Flyball % 36.4 +17.5 18.9 -4.2 23.1 -3.9 27.0
Line Drive % 12.1 -14.6 26.7 +2.5 24.2 +1.6 22.6
Groundball % 48.5 -1.5 50.0 +3.8 46.2 +2.2 44.0
Pull % 30.3 +4.7 25.6 -9.6 35.2 -5.1 40.3
Straight Away % 45.5 +4.9 40.6 +0.5 40.1 +3.0 37.1
Opposite Field % 24.2 -9.7 33.9 +9.2 24.7 +2.1 22.6
Weak Contact % 9.1 +1.3 7.8 -0.4 8.2 +1.9 6.3
Pull Airball % 15.2 +3.0 12.2 -5.4 17.6 -1.3 18.9
Topped Contact % 33.3 -2.3 35.6 +2.1 33.5 -1.1 34.6
Under Contact % 27.3 +9.0 18.3 -7.5 25.8 -0.6 26.4
Flare/Burner Contact % 21.2 -6.6 27.8 +5.8 22.0 -1.9 23.9
Solid Contact % 3.0 -1.4 4.4 0.0 4.4 0.0 4.4
HR/FB % 8.3 -3.5 11.8 -0.1 11.9 -6.7 18.6
Popups 1 -7 8 -4 12 +2 10
Flyballs 12 -22 34 -8 42 -1 43
Line Drives 4 -44 48 +4 44 +8 36
Groundballs 16 -74 90 +6 84 +14 70
Plate Discipline
In Zone % 52.2 -0.7 52.9 -0.5 53.4 +5.2 48.2
Out of Zone % 47.8 +0.7 47.1 +0.5 46.6 -5.2 51.8
Edge % 42.0 +2.0 40.0 -3.4 43.4 +2.3 41.1
Zone Swing % 54.2 -4.2 58.4 -2.3 60.7 +1.1 59.6
Out of Zone Swing % 22.4 -3.7 26.1 -3.1 29.2 -3.2 32.4
In Zone Contact % 86.2 +2.1 84.1 +3.5 80.6 +3.2 77.4
Out of Zone Contact % 68.2 +4.2 64.0 +14.6 49.4 -2.5 51.9
Whiff % 18.8 -2.8 21.6 -7.0 28.6 -3.4 32.0
First Strike % 66.0 +7.1 58.9 -4.9 63.8 +5.6 58.2
First Pitch Swing % 22.0 -4.8 26.8 +2.4 24.4 -1.8 26.2
Swing % 39.0 -4.2 43.2 -2.8 46.0 +0.5 45.5
Meatball Swing % 70.0 +1.6 68.4 +0.3 68.1 +1.4 66.7
Meatball % 9.8 +0.2 9.6 +0.1 9.5 +1.7 7.8
Zone Swing & Miss % 13.8 -2.1 15.9 -3.5 19.4 -3.2 22.6
Out of Zone Swing & Miss % 31.8 -4.2 36.0 -14.6 50.6 +2.5 48.1
In Zone 107 -432 539 -113 652 +132 520
Out of Zone 98 -381 479 -90 569 +11 558
Edge 86 -321 407 -123 530 +87 443
In Zone Swings 58 -257 315 -81 396 +86 310
Out of Zone Swings 22 -103 125 -41 166 -15 181
In Zone Swing & Misses 8 -42 50 -27 77 +7 70
Out of Zone Swing & Misses 7 -38 45 -39 84 -3 87
Basic
Pitches 205 -813 1,018 -203 1,221 +142 1,079
PA 51 -215 266 -42 308 +45 263
AB 45 -191 236 -43 279 +46 233
Hits 10 -50 60 +10 50 -11 61
Singles 8 -33 41 +4 37 -3 40
Doubles 1 -13 14 +7 7 -6 13
Triples 0 -1 1 0 1 +1 0
Home Runs 1 -3 4 -1 5 -3 8
Walks 6 -12 18 0 18 -6 24
Strikeouts 12 -48 60 -39 99 +21 78
K% 23.5 +0.9 22.6 -9.5 32.1 +2.4 29.7
BB% 11.8 +5.0 6.8 +1.0 5.8 -3.3 9.1
HBP 0 -8 8 -1 9 +7 2
Batted Balls 33 -147 180 -2 182 +23 159
Number of Fastballs 141 -491 632 -42 674 +139 535
Number of Offspeed 0 -4 4 +4 0 0 0
Number of Breaking 64 -318 382 -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 49 .274 29 9 31.0 20 11 55.0
! 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%
2026 66 15.6 27.3% 1.5% 34 16.9 0.0% 2.9%

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Pitch Distribution