George Kirby
P | B/T: R/R | 6' 4" 215LBS | Age: 25

Draft: 2019 | Rd: 1, #20, Seattle Mariners | Elon University

Stats

W L ERA G GS SV IP SO WHIP
2023 5 4 3.43 10 10 0 63.0 51 1.10
2 Seasons 13 9 3.40 35 35 0 193.0 184 1.17
G W-L ERA IP SO WHIP
2023 10 5-4 3.43 63.0 51 1.10
2 Seasons 35 13-9 3.40 193.0 184 1.17

Statcast Statistics

Season Age Pitches Batted
Balls
Barrels Barrel % Barrel/PA Exit
Velocity
Max EV Launch
Angle
Sweet
Spot %
XBA XSLG WOBA XWOBA XWOBACON HardHit% K% BB% ERA xERA
2022 24 2092 382 34 8.9 6.3 89.3 111.5 11.3 31.4 .233 .379 .302 .284 .354 38.7 24.5 4.1 3.39 3.31
2023 25 921 195 10 5.1 3.9 88.2 110.3 14.0 28.7 .252 .378 .295 .284 .341 34.9 20.1 2.4 3.43 3.24
Player 3013 577 44 7.6 5.5 88.9 111.5 12.2 30.5 .239 .378 .300 .284 .350 37.4 23.1 3.5
MLB 6.8 4.7 88.4 122.4 12.1 33.0 .245 .405 .316 .315 .368 36.0 22.1 8.4
! Note: All figures in this table cover the period 2015-present.

Statcast Pitch Arsenal

Kirby relies on 5 pitches.
4-Seam Fastball
(40.4%) ,
Sinker
(21.2%) ,
Curveball
(17.9%) ,
Slider
(15.1%) ,
Changeup
(5.4%) ,


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Pitch Tracking



Batted Ball Profile

Season GB % FB % LD % PU % Pull % Straight % Oppo % Weak % Topped % Under % Flare/Burner % Solid % Barrel % Barrel/PA
2022 46.3 25.7 21.2 6.8 31.4 40.3 28.3 3.1 35.3 24.1 22.3 5.8 8.9 6.3
2023 42.6 26.2 21.0 10.3 36.9 30.8 32.3 2.1 35.4 28.2 24.6 4.6 5.1 3.9
Player 45.1 25.8 21.1 8.0 33.3 37.1 29.6 2.8 35.4 25.5 23.1 5.4 7.6 5.5
MLB 44.8 23.2 24.9 7.1 36.8 37.7 25.4 3.9 33.0 24.6 24.4 5.8 6.8 4.7
! Note: All figures in this table cover the period 2015-present.

Pitch Movement


How this works: Every pitch is affected by the forces of gravity, which means that every pitch drops on its way from the mound to the plate. These numbers are reported with gravity, which makes them larger and different than other pitch movement numbers you may have seen. Since gravity requires time, and slower pitches aren’t ‘better’ just because they have more time to move, the movement of a pitch is compared to ‘average’ movement by comparing it to other MLB pitch types within +/- 2 MPH and from within +/- 0.5 feet of extension and release.
Vertical Movement (inches) Horizontal Movement (inches)
Year Pitch Team Hand # MPH Inches of Drop vs Avg % vs Avg Inches of Break vs Avg % Break vs Avg
2023 Changeup SEA R 50 86.6 31.4 0.5 2 16.1 1.2 8
2023 4-Seamer SEA R 367 95.3 14.8 -0.7 -5 8.3 0.7 9
2023 Sinker SEA R 200 94.9 20.0 -0.7 -3 15.7 0.5 3
2023 Curveball SEA R 163 81.6 54.0 3.7 7 9.5 0.7 8
2023 Slider SEA R 141 85.2 40.5 4.6 13 11.9 6.9 136
2022 Sinker SEA R 255 94.7 20.6 0.0 0 16.2 1.2 8
2022 4-Seamer SEA R 950 95.3 15.1 -1.1 -8 8.8 1.3 18
2022 Curveball SEA R 278 80.8 53.6 2.5 5 9.9 1.0 11
2022 Changeup SEA R 167 86.0 33.5 2.5 8 15.3 0.9 6
2022 Cutter SEA R 255 88.3 30.2 -2.9 -11 3.8 1.3 52
2022 Slider SEA R 187 85.5 38.1 2.6 7 10.1 5.0 96
! Note: Years are in reverse order.
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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 %
2023 4-Seamer -2.4 -9 367 39.8 102 .216 .351 .275 25.0 25.5 21.3 .222 .374 .277 33.8
2023 Sinker -1.3 -3 200 21.7 63 .233 .333 .267 18.7 20.6 20.3 .264 .350 .286 44.7
2023 Curveball 0.4 1 163 17.7 43 .286 .476 .317 15.6 18.6 20.5 .207 .298 .214 37.1
2023 Slider 0.4 1 141 15.3 36 .306 .444 .325 14.3 11.1 9.5 .303 .388 .302 18.8
2023 Changeup 6.3 3 50 5.4 10 .500 .900 .595 12.5 0.0 0.0 .468 .872 .564 40.0
2022 4-Seamer -1.9 -18 950 45.4 237 .221 .345 .257 26.4 30.4 22.4 .208 .376 .267 42.9
2022 Curveball 0.3 1 278 13.3 65 .305 .492 .359 13.7 10.8 14.0 .319 .509 .375 35.2
2022 Cutter 1.4 4 255 12.2 60 .362 .638 .450 21.5 23.3 14.3 .268 .432 .314 40.9
2022 Sinker 0.0 0 255 12.2 89 .266 .291 .299 11.9 28.1 26.0 .199 .268 .260 27.8
2022 Slider 1.0 2 187 8.9 47 .283 .370 .333 14.0 19.1 12.3 .204 .250 .209 32.4
2022 Changeup 1.6 3 167 8.0 44 .279 .395 .323 15.8 13.6 13.0 .283 .485 .336 45.9
! Note: Years are in reverse order.
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Spin Direction

Year Pitch Type Pitches MPH Active Spin % Total Movement (In.) Spin-Based Observed Deviation
2022 Changeup 167 86.0 99 16.3 2:15 2:45 -30
2022 Curveball 275 80.8 85 17.6 7:15 7:15 0
2022 Cutter 254 88.3 36 5.9 11:45 10:30 75
2022 4-Seam Fastball 941 95.3 87 17.0 1:15 1:00 15
2022 Sinker 223 94.7 84 19.2 1:15 2:00 -45
2022 Slider 180 85.5 48 11.8 7:30 8:30 -60
2023 Changeup 49 86.6 99 17.3 2:00 2:30 -30
2023 Curveball 159 81.6 82 18.2 7:15 7:00 15
2023 4-Seam Fastball 360 95.3 86 17.1 1:15 1:00 15
2023 Sinker 196 94.9 83 19.0 1:00 2:00 -60
2023 Slider 140 85.2 61 13.9 7:30 8:15 -45
! Note: This table is showing data from the PITCHER perspective.
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Swing/Take

Runs
Year Team PA Pitches Heart Shadow Chase Waste All
2022 574 2,210 -12 -14 8 5 -12
2023 254 921 -3 -8 1 2 -7
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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 %
2022 2,092 55.1 71.9 81.2 29.0 70.7 45.5 67.7 52.6 21.2 8.7 84.1
2023 921 58.2 69.4 84.9 30.9 60.5 43.5 70.9 53.3 20.2 9.3 77.9
Player 3,013 56.0 71.1 82.3 29.6 67.6 44.9 68.7 52.8 20.9 8.9 82.1
MLB 48.5 66.9 82.0 28.4 58.2 42.6 60.8 47.1 24.7 7.3 76.1
! 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
2022 71 55 51 46 86 13 22 28 44 63 96 15 45 58 36 12 74
2023 76 40 63 73 86 29 79 65 74 32 99 13 73 76 43 33 51
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Expected Home Runs

Year Team Avg HR Trot Actual HR xHR HR-xHR Doubters Mostly Gone No Doubters No Doubter %
2022 24.3 13 14.1 -1 13 14 4 30.8
2023 22.7 7 6.4 1 1 5 3 42.9
Player 23.8 20 20.5 -1 14 19 7 35.0

Expected Home Runs by Park

Year HR
2022 13 10 11 18 15 14 17 10 9 10 10 19 17 12 16 19 15 11 12 16 11 14 24 15 9 9 19 21 14 14 12
2023 7 5 7 7 8 7 8 3 7 4 7 7 5 5 8 7 7 6 7 8 4 5 8 7 5 5 7 7 6 7 7
Player 20 15 18 25 23 21 25 13 16 14 17 26 22 17 24 26 22 17 19 24 15 19 32 22 14 14 26 28 20 21 19
! Note: This tells how many of this player's home runs would have been out of other stadiums. This accounts for different wall heights, distances and environmental effects. For these purposes, the 2020 Blue Jays home field was still Rogers Centre, not Sahlen Field.
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Year to Year Changes

Metric 2022 2023 +/-  
Fastball Velocity 94.0 95.1 1.1
Offspeed Velocity 86.0 86.6 0.6
Breaking Velocity 82.7 83.3 0.6
Exit Velocity 89.3 88.2 -1.1
Launch Angle 11.3 14.0 2.7
Barrel % 8.9 5.1 -3.8
Hard Hit % 38.7 34.9 -3.8
Sweet Spot % 31.4 28.7 -2.7
xBA .233 .252 0.019
BA .264 .257 -0.007
xwOBA .284 .284 0.000
wOBA .302 .295 -0.007
xSLG .379 .378 -0.001
SLG .393 .404 0.011
K% 24.5 20.1 -4.4
BB% 4.1 2.4 -1.7
Swing % 52.6 53.3 0.7
Whiff% 21.2 20.2 -1.0
In Zone % 55.1 58.2 3.1
Out of Zone % 44.9 41.8 -3.1
Out of Zone Swing % 29.0 30.9 1.9
First Pitch Swing % 38.6 35.4 -3.2
First Pitch Strike % 67.7 70.9 3.2
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Statcast Shift Statistics

vs RHHvs LHH
YearPAwOBAPAShifts%PAShifts%
2022 542 .302 258 61 23.6 284 165 58.1
2023 254 .295 128 0 0.0 126 0 0.0

Pitch Tempo

Bases EmptyRunners On Base
SeasonTeamPitchesTempoFast %Slow %PitchesTempoFast %Slow %
2022 566 16.5 28.1% 0.7% 310 25.3 0.0% 12.6%
2023 121 15.0 51.2% 0.0% 65 20.5 0.0% 0.0%
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Pitch Distribution