Trevor Kelley
P | Bats/Throws: R/R | 6' 2" 210LBS | Age: 32
Draft: 2015 | Rd: 36, #1071, Boston Red Sox | North Carolina
W L ERA G GS SV IP SO WHIP
2020 0 0 10.80 4 0 0 3.1 5 2.70
2022 1 0 6.08 18 0 0 23.2 23 1.44
2023 0 1 5.87 10 3 0 15.1 11 1.43
4 Seasons 1 4 6.75 42 3 0 50.2 45 1.56
G W-L ERA IP SO WHIP
2020 4 0-0 10.80 3.1 5 2.70
2022 18 1-0 6.08 23.2 23 1.44
2023 10 0-1 5.87 15.1 11 1.43
4 Seasons 42 1-4 6.75 50.2 45 1.56
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 26 163 29 4 13.8 10.0 91.0 109.4 26.3 44.8 .272 .615 .370 .430 .474 44.8 15.0 12.5 8.64 9.21
2020 27 77 13 1 7.7 5.3 87.8 106.6 12.4 38.5 .330 .618 .543 .414 .551 38.5 26.3 5.3 10.80 8.02
2022 29 460 73 9 12.3 8.4 85.0 111.8 19.6 39.7 .217 .429 .373 .317 .360 23.3 21.5 8.4 6.08 4.20
2023 30 272 50 5 10.0 7.2 87.5 107.3 14.3 40.0 .257 .479 .373 .351 .379 46.0 15.9 8.7 5.87 5.34
Player 972 165 19 11.5 8.1 87.0 111.8 18.6 40.6 .247 .488 .386 .354 .401 35.2 19.1 8.9
MLB 7.0 4.8 88.5 122.4 12.3 33.2 .245 .406 .316 .315 .369 36.5 22.2 8.4
! Note: All figures in this table cover the period 2015-present.

Statcast Pitch Arsenal

Kelley relies on 4 pitches.
Four Seamer
(52.9%) ,
Sweeper
(38.6%) ,
Slider
(7.4%) ,
Changeup
(1.1%) ,


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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
2019 17.2 51.7 24.1 6.9 34.5 41.4 24.1 3.4 13.8 34.5 17.2 17.2 13.8 10.0
2020 30.8 30.8 30.8 7.7 53.8 23.1 23.1 0.0 30.8 15.4 30.8 15.4 7.7 5.3
2022 35.6 30.1 23.3 11.0 42.5 28.8 28.8 8.2 26.0 35.6 13.7 4.1 12.3 8.4
2023 34.0 36.0 22.0 8.0 42.0 26.0 32.0 2.0 24.0 24.0 24.0 16.0 10.0 7.2
Player 31.5 35.8 23.6 9.1 41.8 29.7 28.5 4.8 23.6 30.3 18.8 10.9 11.5 8.1
MLB 44.4 23.8 24.7 7.1 37.2 37.5 25.2 3.9 32.6 24.8 24.4 5.9 7.0 4.8
! 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
2023 4-Seam Fastball TB R 144 89.1 32.4 -2.8 20.0ARM 3.1 2.6 -13.2 20.0ARM 12.6
2023 Slider TB R 20 81.5 35.7 -2.3 1.8GLV -3.8 6.3 -4.8 1.8GLV -3.5
2023 Changeup TB R 3 79.3 45.3 0.9 21.1ARM 2.3 -1.2 6.6 21.1ARM 6.7
2023 Sweeper TB R 105 75.7 40.6 -0.4 15.5GLV -1.4 8.1 -6.6 15.5GLV 1.4
2022 Curveball MIL R 113 78.5 46.0 0.0 9.0GLV -0.1 -1.5 -8.4 9.0GLV -0.1
2022 Changeup MIL R 29 80.7 44.5 -1.5 17.7ARM 1.0 -1.8 7.7 17.7ARM 3.5
2022 Slider MIL R 23 83.3 35.2 -1.0 0.9GLV -3.3 4.3 -2.5 0.9GLV -4.8
2022 4-Seam Fastball MIL R 295 89.9 28.9 -0.9 17.5ARM 1.8 5.4 -10.8 17.5ARM 10.2
2020 Curveball PHI R 12 78.3 49.5 2.8 11.7GLV -2.6 -4.6 -5.1 11.7GLV 2.5
2020 4-Seam Fastball PHI R 42 90.2 26.0 0.7 18.6ARM 9.0 8.0 -8.0 18.6ARM 11.3
2020 Changeup PHI R 1 81.4 41.9 -1.5 18.1ARM 1.8 0.0 6.4 18.1ARM 4.7
2020 Slider PHI R 22 85.1 33.2 -1.1 1.0ARM -1.9 4.6 -3.2 1.0ARM -6.3
2019 Curveball BOS R 34 78.8 49.5 -0.2 8.9GLV -0.8 -4.6 -5.1 8.9GLV -0.3
2019 Slider BOS R 28 83.2 34.9 -1.0 0.3GLV -2.1 4.8 -3.0 0.3GLV -4.8
2019 Changeup BOS R 3 81.2 38.0 -4.9 19.3ARM 0.5 4.2 2.7 19.3ARM 5.8
2019 4-Seam Fastball BOS R 98 88.6 26.8 -0.3 17.6ARM 3.0 8.3 -7.3 17.6ARM 10.1
! 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-Seam Fastball -0.6 -1 144 52.9 41 .250 .389 .327 16.4 9.8 11.1 .289 .511 .383 43.8
2023 Sweeper -0.6 -1 105 38.6 22 .238 .524 .334 32.0 31.8 17.1 .202 .362 .260 42.9
2023 Slider -4.1 -1 20 7.4 4 .333 1.333 .675 25.0 0.0 -- .253 .864 .512 66.7
2023 Changeup -34.6 -1 3 1.1 1 1.000 4.000 2.000 0.0 0.0 -- .254 .634 .373 100.0
2022 4-Seam Fastball 1.0 3 295 64.1 76 .231 .415 .336 16.2 18.4 15.1 .220 .405 .329 19.6
2022 Curveball -1.6 -2 113 24.6 20 .200 .550 .308 44.4 35.0 17.5 .118 .246 .154 15.4
2022 Changeup -5.1 -1 29 6.3 7 .429 .857 .543 33.3 28.6 12.5 .282 .653 .399 20.0
2022 Slider -10.9 -3 23 5.0 4 .750 1.750 1.038 7.7 0.0 0.0 .550 1.331 .791 100.0
2020 4-Seam Fastball -3.0 -1 42 54.5 9 .500 .875 .600 17.6 33.3 25.0 .309 .485 .376 40.0
2020 Slider 4.2 1 22 28.6 7 .286 .286 .257 16.7 14.3 11.1 .293 .354 .286 16.7
2020 Curveball -19.7 -2 12 15.6 3 .667 2.000 1.083 25.0 33.3 33.3 .471 1.589 .826 100.0
2020 Changeup -5.1 0 1 1.3 -- -- -- -- -- -- -- -- -- --
2019 4-Seam Fastball -1.3 -1 98 60.1 29 .318 .636 .400 17.4 13.8 11.4 .247 .578 .413 38.1
2019 Curveball -0.2 0 34 20.9 6 .200 .200 .417 12.5 16.7 11.1 .277 .312 .332 25.0
2019 Slider 0.4 0 28 17.2 5 .250 1.000 .400 13.3 20.0 12.5 .402 1.198 .658 100.0
2019 Changeup 0.1 0 3 1.8 -- -- -- 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.
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Spin Direction

Year Pitch Type Pitches MPH Active Spin % Total Movement (In.) Spin-Based Observed Deviation
2023 4-Seam Fastball 143 89.1 96 21.1 2:30 3:00 -30
2023 Slider 20 81.5 18 5.6 10:30 11:15 -45
2023 Sweeper 105 75.7 56 17.5 9:15 9:45 -30
2022 Changeup 28 80.7 98 19.0 3:30 3:30 0
2022 Curveball 110 78.5 48 10.3 9:15 8:15 60
2022 4-Seam Fastball 286 89.9 94 18.8 2:45 2:30 15
2022 Slider 23 83.3 23 5.0 12:15 11:15 60
2020 Curveball 12 78.3 59 14.0 8:45 8:00 45
2020 4-Seam Fastball 40 90.2 99 20.6 2:30 2:15 15
2020 Slider 21 84.9 28 3.6 12:45 12:15 30
! 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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Swing/Take

Runs
Year Team PA Pitches Heart Shadow Chase Waste All
2019 40 163 0 1 -1 -1 -1
2022 107 460 4 -3 -2 -2 -3
2023 68 272 -2 1 -1 -1 -3
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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 163 52.1 64.7 89.1 19.2 60.0 41.1 70.0 42.9 15.7 8.6 64.3
2020 77 57.1 59.1 88.5 21.2 57.1 44.2 63.2 42.9 18.2 13.0 70.0
2022 460 46.7 63.3 87.5 26.1 54.7 41.5 55.1 43.5 23.0 5.7 80.8
2023 272 43.8 52.9 74.6 34.6 79.2 42.6 66.7 42.6 23.3 7.0 42.1
Player 972 47.6 60.5 85.0 27.3 64.7 42.0 61.7 43.1 21.5 7.1 65.2
MLB 48.7 67.0 82.0 28.5 57.8 42.6 61.0 47.2 24.9 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
2019 4 51 83
2022 6 47 58 83
2023 4 31 77
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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 24.0 2 1.1 1 2 1 0 0.0
2020 25.3 2 1.9 0 0 1 1 50.0
2022 23.3 7 7.3 0 3 6 2 28.6
2023 22.8 4 3.4 1 2 3 1 25.0
Player 23.6 15 13.7 1 7 11 4 26.7
Note: xHR tells how many of this pitcher's home runs 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 2 2 1 1 2 1 1 1 0 0 1 1 1 1 1 1 1 1 2 1 1 2 1 2 1 1 1 1 2 1 0
2020 2 2 1 2 2 2 2 2 2 1 2 2 2 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
2022 7 6 4 9 8 8 8 5 7 7 7 8 8 8 7 9 8 6 7 7 8 6 8 8 7 6 8 9 8 8 6
2023 4 1 3 5 3 3 4 4 4 3 3 4 4 3 4 4 4 4 3 4 3 3 4 4 3 3 3 3 4 3 3
Player 15 11 9 17 15 14 15 12 13 11 13 15 15 13 14 16 15 13 14 14 14 13 15 16 13 12 14 15 16 14 11
Note: xHR tells how many of this pitcher's home runs 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

Metric 2019 2020 +/-   2021 +/-   2022 +/-   2023 +/-  
Fastball Velocity 88.6 -- 1.6 -- -- 89.9 -- 89.1 -0.8
Offspeed Velocity 81.2 -- 0.2 -- -- 80.7 -- 79.3 -1.4
Breaking Velocity 80.8 -- 1.9 -- -- 79.3 -- 76.6 -2.7
Exit Velocity 91.0 -- -3.2 -- -- 85.0 -- 87.5 2.5
Launch Angle 26.3 -- -13.9 -- -- 19.6 -- 14.3 -5.3
Barrel % 13.8 -- -6.1 -- -- 12.3 -- 10.0 -2.3
Hard Hit % 44.8 -- -6.3 -- -- 23.3 -- 46.0 22.7
LA Sweet-Spot % 44.8 -- -6.3 -- -- 39.7 -- 40.0 0.3
xBA .272 -- 0.058 -- -- .217 -- .257 0.040
BA .290 -- 0.154 -- -- .260 -- .262 0.002
xwOBA .430 -- -0.016 -- -- .317 -- .351 0.034
wOBA .370 -- 0.173 -- -- .373 -- .373 0.000
xSLG .615 -- 0.003 -- -- .429 -- .479 0.050
SLG .613 -- 0.220 -- -- .531 -- .541 0.010
K% 15.0 -- 11.3 -- -- 21.5 -- 15.9 -5.6
BB% 12.5 -- -7.2 -- -- 8.4 -- 8.7 0.3
Swing % 42.9 -- 0.0 -- -- 43.5 -- 42.6 -0.9
Whiff% 15.7 -- 2.5 -- -- 23.0 -- 23.3 0.3
In Zone % 52.1 -- 5.0 -- -- 46.7 -- 43.8 -2.9
Out of Zone % 47.9 -- -5.0 -- -- 53.3 -- 56.3 3.0
Out of Zone Swing % 19.2 -- 2.0 -- -- 26.1 -- 34.6 8.5
First Pitch Swing % 35.0 -- -8.7 -- -- 22.4 -- 21.7 -0.7
First Pitch Strike % 70.0 -- -6.8 -- -- 55.1 -- 66.7 11.6
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Statcast Fielder Positioning

vs RHHvs LHH
YearAlignment TypePAwOBAPATotal%PATotal%
2019 Shifts 40 .370 29 1 3.4 11 10 90.9
2020 Shifts 19 .543 11 5 45.5 8 3 37.5
2022 Shifts 107 .373 67 12 17.9 40 20 50.0
2023 Shades 68 .373 50 14 28.0 18 8 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 52 16.1 28.8% 0.0% 30 21.8 0.0% 10.0%
2020 17 17.9 5.9% 0.0% 24 20.9 4.2% 4.2%
2022 143 16.0 30.1% 0.0% 98 19.4 4.1% 5.1%
2023 94 14.4 57.4% 1.1% 46 16.5 23.9% 2.2%

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Pitch Distribution