P | Chicago White Sox
Bats/Throws: L/L | 6' 0" 225 lbs | Age: 31
Draft: 2016 | Rd. 1, No. 31, New York Mets | Connecticut
W L ERA G GS SV IP SO WHIP
2022 0 0 4.50 1 0 0 2 3 1.50
2023 0 0 6.14 16 0 0 14.2 11 1.50
2026 0 0 4.00 2 1 0 9 5 1.33
6 Seasons 4 2 5.44 46 8 0 94.1 93 1.58
G W-L ERA IP SO WHIP
2022 1 0-0 4.50 2 3 1.50
2023 16 0-0 6.14 14.2 11 1.50
2026 2 0-0 4.00 9 5 1.33
6 Seasons 46 4-2 5.44 94.1 93 1.58
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
2019 24 258 44 2 4.5 3.2 85.6 104.5 6.8 29.5 .272 .398 .290 .324 .369 29.5 20.6 7.9 5.79 4.66
2020 25 409 62 5 8.1 5.1 88.7 111.8 15.4 35.5 .267 .465 .364 .358 .416 37.1 22.4 14.3 5.14 5.63
2021 26 649 96 8 8.3 5.1 86.7 111.2 7.3 46.9 .249 .432 .384 .344 .406 33.3 25.0 11.5 5.61 5.12
2022 27 39 5 1 20.0 10.0 104.8 116.2 17.8 60.0 .290 .372 .393 .432 .583 100.0 30.0 10.0 4.50 8.62
2023 28 242 44 5 11.4 7.6 90.2 109.9 19.3 45.5 .294 .496 .352 .391 .411 40.9 16.7 13.6 6.14 6.90
2026 31 168 29 3 10.3 7.5 92.4 108.5 6.6 24.1 .322 .591 .322 .437 .458 58.6 12.5 15.0 4.00 8.86
Player 1765 280 24 8.6 5.5 88.4 116.2 11.0 39.3 .271 .456 .355 .362 .412 38.6 21.5 12.2
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

Kay relies on 5 pitches.
Four Seamer
(30.4%) ,
Sweeper
(21.4%) ,
Slider
(16.7%) ,
Sinker
(16.1%) ,
Changeup
(15.5%) ,


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+ If Available Pitches Click to Video.


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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 %
2019 54.5 45.5 13.6 22.7 9.1 36.4 43.2 20.5 27.3 20.5 6.8 9.1 22.7 13.6
2020 37.1 62.9 25.8 29.0 8.1 30.6 41.9 27.4 14.5 19.4 3.2 16.1 22.6 24.2
2021 47.9 52.1 21.9 27.1 3.1 35.4 31.3 33.3 22.9 15.6 9.4 12.5 15.6 24.0
2022 20.0 80.0 20.0 60.0 0.0 80.0 20.0 0.0 20.0 0.0 0.0 60.0 20.0 0.0
2023 31.8 68.2 15.9 36.4 15.9 45.5 40.9 13.6 20.5 11.4 0.0 25.0 29.5 13.6
2026 51.7 48.3 20.7 24.1 3.4 65.5 31.0 3.4 34.5 13.8 3.4 31.0 17.2 0.0
Player 43.9 56.1 20.4 28.6 7.1 40.0 36.8 23.2 22.5 16.1 5.4 17.5 20.7 17.9
MLB 44.2 55.8 24.1 24.6 7.1 37.4 37.4 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
2019 6.8 40.9 13.6 27.3 6.8 4.5 3.2
2020 6.5 17.7 32.3 27.4 4.8 8.1 5.1
2021 4.2 39.6 16.7 25.0 6.3 8.3 5.1
2022 0.0 0.0 20.0 60.0 0.0 20.0 10.0
2023 2.3 20.5 25.0 31.8 9.1 11.4 7.6
2026 3.4 34.5 17.2 24.1 6.9 10.3 7.5
Player 4.6 30.7 21.1 27.5 6.4 8.6 5.5
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 Slider CWS L 28 90.4 26.3 -5.0 2.2GLV -0.3 7.2 -6.0 2.2GLV -2.8
2026 4-Seam Fastball CWS L 51 95.5 14.6 -0.6 7.3ARM -0.6 15.6 -0.7 7.3ARM -0.8
2026 Changeup CWS L 26 85.4 38.4 4.5 13.5ARM -1.7 -0.8 4.9 13.5ARM -0.8
2026 Sinker CWS L 27 95.1 25.0 2.4 17.2ARM 1.2 5.5 1.9 17.2ARM 1.5
2026 Sweeper CWS L 36 82.5 41.5 1.4 12.8GLV -0.5 -1.0 1.7 12.8GLV -0.8
2023 Sweeper NYM L 32 81.4 40.2 -0.8 14.2GLV -0.3 1.3 -0.1 14.2GLV 0.1
2023 Changeup NYM L 9 86.7 31.8 0.3 13.2ARM -1.4 4.6 1.8 13.2ARM -0.9
2023 4-Seam Fastball NYM L 132 94.5 15.7 -0.6 6.8ARM -1.4 14.9 -0.7 6.8ARM -0.6
2023 Slider NYM L 69 88.3 33.8 0.7 3.6GLV -0.3 1.1 0.5 3.6GLV -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 4-Seam Fastball -4.5 -2 51 30.4 16 .308 .692 .469 13.0 12.5 11.1 .448 .740 .545 63.6
2026 Sweeper 3.2 1 36 21.4 4 .000 .000 .000 22.2 25.0 10.0 .168 .577 .305 66.7
2026 Slider -0.6 0 28 16.7 8 .167 .667 .486 7.1 0.0 0.0 .301 .934 .564 50.0
2026 Sinker 0.3 0 27 16.1 8 .143 .143 .313 18.8 12.5 16.7 .266 .296 .306 50.0
2026 Changeup 1.6 0 26 15.5 4 .000 .000 .000 30.0 25.0 12.5 .187 .209 .173 66.7
2023 4-Seam Fastball 1.6 2 132 54.5 40 .226 .323 .324 14.3 7.5 9.1 .291 .500 .400 34.5
2023 Slider -1.9 -1 69 28.5 15 .231 .615 .393 18.8 20.0 18.8 .280 .471 .369 30.0
2023 Sweeper -4.0 -1 32 13.2 9 .250 .625 .400 50.0 55.6 33.3 .268 .492 .363 100.0
2023 Changeup -4.7 0 9 3.7 2 .500 .500 .450 33.3 0.0 0.0 .538 .601 .495 100.0
! 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 Changeup 19 85.6 77 14.8 10:15 8:45 90
2026 4-Seam Fastball 51 95.5 83 16.7 10:45 11:00 -15
2026 Sinker 24 95.0 79 18.6 10:30 9:30 60
2026 Slider 28 90.4 32 6.8 12:00 12:45 -45
2026 Sweeper 36 82.5 55 14.0 4:00 3:30 30
2023 4-Seam Fastball 122 94.6 76 15.9 10:45 11:00 -15
2023 Slider 66 88.3 23 4.6 2:15 3:00 -45
2023 Sweeper 32 81.4 55 15.2 4:00 3:00 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
2019 63 258 2 2 -2 -1 1
2020 97 409 2 3 -5 -3 -4
2021 156 649 -4 2 -6 -4 -12
2022 10 39 0 0 0 0 0
2023 66 242 -1 4 -2 -2 -1
2026 40 168 3 -1 -3 -1 -1
Player 432 1,765 3 9 -18 3 -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 %
2019 258 44.2 76.3 86.2 31.9 56.5 46.5 55.6 51.6 24.1 5.4 92.9
2020 409 46.9 72.9 79.3 18.4 55.0 42.3 45.4 44.0 26.1 6.6 88.9
2021 649 46.7 72.3 81.3 26.6 57.6 42.2 59.0 47.9 25.7 7.7 86.0
2022 39 35.9 42.9 83.3 44.0 54.5 43.6 60.0 43.6 35.3 2.6 0.0
2023 242 41.7 78.2 89.9 34.8 63.3 34.7 56.1 52.9 20.3 5.0 75.0
2026 168 39.3 56.1 89.2 34.3 77.1 41.7 67.5 42.9 16.7 4.8 75.0
Player 1,765 44.8 71.9 83.3 28.0 60.4 41.8 55.8 47.6 24.1 6.3 84.8
MLB 48.8 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
2019 51 62 29
2020 22 19 30 71 15 54 74 49 43 2 45 45 7 35 49 26 19
2021 68 85 35 11
2022
2023 60 94 12
2026 29 11 79 68 7 67 45 20 72 10 11 21 36 10 71 8
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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 %
2019 -- 0 0.4 0 0 1 0 --
2020 24.86 3 3.4 0 0 2 2 66.7
2021 23.56 7 4.4 3 2 2 3 42.9
2023 21.36 2 1.9 0 1 1 1 50.0
2026 28.75 2 2.1 0 1 2 0 0.0
Player 24.27 14 12.2 2 4 8 6 42.9
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
2019 0 0 1 1 0 0 0 1 0 0 0 1 1 0 0 1 0 0 1 1 1 0 1 1 0 0 0 1 1 0 0
2020 3 4 2 3 3 4 4 3 3 3 3 3 4 4 3 3 4 3 4 4 4 4 4 4 3 3 3 3 4 3 3
2021 7 5 4 5 4 5 5 5 4 4 4 4 5 5 4 5 4 4 5 4 4 3 5 5 4 4 5 4 5 4 4
2023 2 2 2 3 2 2 2 2 1 2 2 1 2 2 2 2 2 2 2 2 2 2 3 2 2 2 2 2 2 1 1
2026 2 3 3 1 0 2 2 1 3 2 2 2 1 2 2 2 2 2 2 3 2 3 3 2 2 2 2 2 3 2 2
Player 14 14 12 13 9 13 13 12 11 11 11 11 13 13 11 13 12 11 14 14 13 12 16 14 11 11 12 12 15 10 10
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

2023 +/-   2022 +/-   2021 +/-   2020 +/-   2019
Results
BA .241 -.045 .286 +.005 .281 +.013 .268 +.005 .263
xBA .294 +.004 .290 +.041 .249 -.018 .267 -.005 .272
OBP .364 -.036 .400 +.022 .378 +.011 .367 +.034 .333
xOBP .408 -.076 .484 +.134 .350 -.019 .369 +.028 .341
SLG .444 -.127 .571 +.052 .519 +.019 .500 +.184 .316
xSLG .496 +.124 .372 -.060 .432 -.033 .465 +.067 .398
ISO .204 -.082 .286 +.049 .237 +.005 .232 +.179 .053
xISO .202 +.121 .081 -.101 .182 -.016 .198 +.072 .126
BABIP .262 -.138 .400 +.052 .348 +.026 .322 -.019 .341
wOBA .352 -.041 .393 +.009 .384 +.020 .364 +.074 .290
xwOBA .391 -.041 .432 +.088 .344 -.014 .358 +.034 .324
wOBAcon .353 -.152 .505 +.034 .471 +.048 .423 +.103 .320
xwOBAcon .411 -.172 .583 +.177 .406 -.010 .416 +.047 .369
BACON .295 -.105 .400 +.004 .396 +.041 .355 +.014 .341
xBACON .362 -.207 .569 +.218 .351 -.007 .358 +.006 .352
Statcast Hit Metrics
Hard Hit % 40.9 -59.1 100.0 +66.7 33.3 -3.8 37.1 +7.6 29.5
Avg Exit Velocity 90.2 -14.6 104.8 +18.1 86.7 -2.0 88.7 +3.1 85.6
Launch Angle Sweet-Spot % 45.5 -14.5 60.0 +13.1 46.9 +11.4 35.5 +6.0 29.5
Barrel % 11.4 -8.6 20.0 +11.7 8.3 +0.2 8.1 +3.6 4.5
Avg Launch Angle 19.3 +1.5 17.8 +10.5 7.3 -8.1 15.4 +8.6 6.8
Statcast Bat Tracking
Bat Speed 71.2 -- -- -- -- -- -- -- --
Attack Angle 12° -- -- -- -- -- -- -- --
Ideal Attack Angle % 57.1 -- -- -- -- -- -- -- --
Attack Direction -2° -- -- -- -- -- -- -- --
Swing Path - Tilt 32° -- -- -- -- -- -- -- --
Swing Length 7.2 -- -- -- -- -- -- -- --
Statcast Pitch Metrics
Fastball Velocity 94.6 +0.1 94.5 +1.0 93.5 +0.1 93.4 0.0 93.4
Breaking Velocity 86.2 +3.8 82.4 +2.4 80.0 +2.1 77.9 -0.2 78.1
Offspeed Velocity 86.8 -- -- -- 86.2 -0.1 86.3 +0.9 85.4
Batted Ball Results
Barrels 5 +4 1 -7 8 +3 5 +3 2
Popup % 15.9 +15.9 0.0 -3.1 3.1 -5.0 8.1 -1.0 9.1
Flyball % 15.9 -4.1 20.0 -1.9 21.9 -3.9 25.8 +12.2 13.6
Line Drive % 36.4 -23.6 60.0 +32.9 27.1 -1.9 29.0 +6.3 22.7
Groundball % 31.8 +11.8 20.0 -27.9 47.9 +10.8 37.1 -17.4 54.5
Pull % 45.5 -34.5 80.0 +44.6 35.4 +4.8 30.6 -5.8 36.4
Straight Away % 40.9 +20.9 20.0 -11.3 31.3 -10.6 41.9 -1.3 43.2
Opposite Field % 13.6 +13.6 0.0 -33.3 33.3 +5.9 27.4 +6.9 20.5
Weak Contact % 2.3 +2.3 0.0 -4.2 4.2 -2.3 6.5 -0.3 6.8
Pull Airball % 25.0 -35.0 60.0 +47.5 12.5 -3.6 16.1 +7.0 9.1
Topped Contact % 20.5 +20.5 0.0 -39.6 39.6 +21.9 17.7 -23.2 40.9
Under Contact % 25.0 +5.0 20.0 +3.3 16.7 -15.6 32.3 +18.7 13.6
Flare/Burner Contact % 31.8 -28.2 60.0 +35.0 25.0 -2.4 27.4 +0.1 27.3
Solid Contact % 9.1 +9.1 0.0 -6.3 6.3 +1.5 4.8 -2.0 6.8
HR/FB % 28.6 +28.6 0.0 -33.3 33.3 +14.5 18.8 +18.8 0.0
Popups 7 +7 0 -3 3 -2 5 +1 4
Flyballs 7 +6 1 -20 21 +5 16 +10 6
Line Drives 16 +13 3 -23 26 +8 18 +8 10
Groundballs 14 +13 1 -45 46 +23 23 -1 24
Plate Discipline
In Zone % 41.7 +5.8 35.9 -10.8 46.7 -0.2 46.9 +2.7 44.2
Out of Zone % 58.3 -5.8 64.1 +10.8 53.3 +0.2 53.1 -2.7 55.8
Edge % 34.7 -8.9 43.6 +1.4 42.2 -0.1 42.3 -4.2 46.5
Zone Swing % 78.2 +35.3 42.9 -29.4 72.3 -0.6 72.9 -3.4 76.3
Out of Zone Swing % 34.8 -9.2 44.0 +17.4 26.6 +8.2 18.4 -13.5 31.9
In Zone Contact % 89.9 +6.6 83.3 +2.0 81.3 +2.0 79.3 -6.9 86.2
Out of Zone Contact % 63.3 +8.8 54.5 -3.1 57.6 +2.6 55.0 -1.5 56.5
Whiff % 20.3 -15.0 35.3 +9.6 25.7 -0.4 26.1 +2.0 24.1
First Strike % 56.1 -3.9 60.0 +1.0 59.0 +13.6 45.4 -10.2 55.6
First Pitch Swing % 37.9 +17.9 20.0 -11.4 31.4 +6.7 24.7 -7.0 31.7
Swing % 52.9 +9.3 43.6 -4.3 47.9 +3.9 44.0 -7.6 51.6
Meatball Swing % 75.0 +75.0 0.0 -86.0 86.0 -2.9 88.9 -4.0 92.9
Meatball % 5.0 +2.4 2.6 -5.1 7.7 +1.1 6.6 +1.2 5.4
Zone Swing & Miss % 10.1 -6.6 16.7 -2.0 18.7 -2.0 20.7 +6.9 13.8
Out of Zone Swing & Miss % 36.7 -8.8 45.5 +3.1 42.4 -2.6 45.0 +1.5 43.5
In Zone 101 +87 14 -289 303 +111 192 +78 114
Out of Zone 141 +116 25 -321 346 +129 217 +73 144
Edge 84 +67 17 -257 274 +101 173 +53 120
In Zone Swings 79 +73 6 -213 219 +79 140 +53 87
Out of Zone Swings 49 +38 11 -81 92 +52 40 -6 46
In Zone Swing & Misses 8 +7 1 -40 41 +12 29 +17 12
Out of Zone Swing & Misses 18 +13 5 -34 39 +21 18 -2 20
Basic
Pitches 242 +203 39 -610 649 +240 409 +151 258
PA 66 +56 10 -146 156 +58 98 +35 63
AB 54 +47 7 -128 135 +53 82 +25 57
Hits 13 +11 2 -36 38 +16 22 +7 15
Singles 6 +6 0 -21 21 +11 10 -2 12
Doubles 5 +3 2 -7 9 +1 8 +5 3
Triples 0 0 0 -1 1 0 1 +1 0
Home Runs 2 +2 0 -7 7 +4 3 +3 0
Walks 9 +8 1 -17 18 +4 14 +9 5
Strikeouts 11 +8 3 -36 39 +17 22 +9 13
K% 16.7 -13.3 30.0 +5.0 25.0 +2.6 22.4 +1.8 20.6
BB% 13.6 +3.6 10.0 -1.5 11.5 -2.8 14.3 +6.4 7.9
HBP 2 +1 1 -2 3 +3 0 -1 1
Batted Balls 44 +39 5 -91 96 +34 62 +18 44
Number of Fastballs 132 +108 24 -425 449 +209 240 +81 159
Number of Offspeed 9 +9 0 -74 74 0 74 +24 50
Number of Breaking 69 +54 15 -111 126 +31 95 +46 49
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Statcast Fielder Positioning

vs RHHvs LHH
YearAlignment TypePAwOBAPATotal%PATotal%
2019 Shifts 63 .290 51 6 11.8 12 6 50.0
2020 Shifts 96 .368 49 11 22.4 47 24 51.1
2021 Shifts 151 .392 105 9 8.6 46 18 39.1
2022 Shifts 10 .393 9 7 77.8 1 0 0.0
2023 Shades 63 .369 41 2 4.9 22 4 18.2
2026 Shades 40 .322 31 1 3.2 9 4 44.4
! 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 %
2019 71 15.6 42.3% 1.4% 34 20.8 0.0% 2.9%
2020 106 15.6 40.6% 2.8% 89 24.4 0.0% 10.1%
2021 146 16.9 25.3% 2.1% 136 24.8 0.0% 13.2%
2022 6 13.7 50.0% 0.0% 10 23.0 0.0% 10.0%
2023 46 13.4 67.4% 0.0% 48 18.2 0.0% 0.0%
2026 24 15.3 37.5% 0.0% 20 20.9 0.0% 5.0%

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Pitch Distribution