Kenley Jansen
P | Bats/Throws: S/R | 6' 5" 265LBS | Age: 37
W L ERA G GS SV IP SO WHIP
2022 5 2 3.38 65 0 41 64 85 1.05
2023 3 6 3.63 51 0 29 44.2 52 1.28
2024 4 2 3.29 54 0 27 54.2 62 1.06
15 Seasons 49 36 2.57 871 0 447 868.1 1,221 0.96
G W-L ERA IP SO WHIP
2022 65 5-2 3.38 64 85 1.05
2023 51 3-6 3.63 44.2 52 1.28
2024 54 4-2 3.29 54.2 62 1.06
15 Seasons 871 49-36 2.57 868.1 1,221 0.96
MLB Percentile Rankings
Movement Profile (Induced Break)
?
▾

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
2015 27 795 110 9 8.2 4.5 86.9 113.5 22.8 25.5 .155 .285 .225 .213 .327 29.1 40.0 4.0 2.41 1.87
2016 28 1002 134 7 5.2 2.8 86.4 110.0 22.7 28.4 .143 .238 .192 .189 .297 24.6 41.4 4.4 1.83 1.51
2017 29 1012 139 6 4.3 2.3 84.2 111.9 17.1 32.4 .170 .265 .207 .203 .332 23.4 42.4 2.7 1.32 1.76
2018 30 1141 188 14 7.4 4.8 84.3 109.7 19.0 33.5 .202 .348 .273 .264 .340 24.6 28.4 5.9 3.01 2.90
2019 31 1068 163 10 6.1 3.8 86.3 114.1 19.4 33.1 .205 .341 .277 .262 .340 26.1 30.4 6.1 3.71 2.97
2020 32 446 57 2 3.5 2.0 82.7 108.2 22.2 33.3 .192 .290 .279 .266 .330 14.0 32.4 8.8 3.33 2.95
2021 33 1071 153 7 4.6 2.5 84.0 106.0 19.8 30.1 .180 .271 .229 .260 .310 26.1 30.9 12.9 2.22 2.81
2022 34 1006 151 11 7.3 4.2 87.1 117.2 21.9 29.8 .169 .292 .265 .239 .310 32.5 32.7 8.5 3.38 2.34
2023 35 721 117 8 6.8 4.3 89.8 111.9 28.6 29.9 .203 .341 .303 .275 .333 35.9 27.7 9.0 3.63 3.14
2024 36 801 135 15 11.1 6.9 90.4 114.6 22.3 36.3 .208 .352 .253 .280 .351 37.0 28.4 9.2 3.29 3.24
Player 9063 1347 89 6.6 3.9 86.2 117.2 21.3 31.3 .182 .302 .248 .244 .327 27.9 33.5 7.1
MLB 7.0 4.8 88.5 122.4 12.3 33.2 .245 .405 .316 .315 .368 36.5 22.2 8.4
! Note: All figures in this table cover the period 2015-present.

Statcast Pitch Arsenal

Jansen relies on 3 pitches.
Cutter
(84.9%) ,
Slider
(7.7%) ,
Sinker
(7.4%) ,


  • ▾
  •   
    ▾
  •   
    ▾
  •   
    ▾

+ If Available Pitches Click to Video.


  • ▾
  •   
    ▾
  •   
    ▾
  •   
    ▾
  •   
    ▾
  •   
    ▾
  •   
    ▾
  •   
    ▾

Pitch Tracking



Batted Ball Profile

Season GB % FB % LD % PU % Pull % Straight % Oppo % Weak % Topped % Under % Flare/Burner % Solid % Barrel % Barrel/PA
2015 36.4 26.4 20.0 17.3 34.5 30.9 34.5 5.5 20.9 41.8 20.0 1.8 8.2 4.5
2016 32.8 34.3 20.1 12.7 32.1 34.3 33.6 4.5 21.6 40.3 19.4 6.0 5.2 2.8
2017 38.8 20.1 24.5 16.5 33.8 37.4 28.8 10.1 25.2 30.9 23.7 4.3 4.3 2.3
2018 36.2 27.1 23.4 13.3 39.9 37.8 21.8 6.4 27.7 31.4 21.3 4.8 7.4 4.8
2019 36.2 25.8 27.0 11.0 39.9 33.7 26.4 4.9 25.2 34.4 24.5 1.8 6.1 3.8
2020 26.3 28.1 31.6 14.0 40.4 35.1 24.6 1.8 21.1 42.1 26.3 1.8 3.5 2.0
2021 37.9 30.1 19.0 13.1 33.3 39.2 27.5 12.4 26.1 29.4 22.9 4.6 4.6 2.5
2022 30.5 39.1 18.5 11.9 41.1 30.5 28.5 6.0 21.2 39.1 21.2 5.3 7.3 4.2
2023 21.4 37.6 23.1 17.9 33.3 35.0 31.6 3.4 16.2 43.6 22.2 7.7 6.8 4.3
2024 31.1 36.3 22.2 10.4 35.6 37.0 27.4 1.5 23.0 40.7 19.3 4.4 11.1 6.9
Player 33.5 30.4 22.5 13.6 36.5 35.3 28.2 6.0 23.3 36.5 21.9 4.4 6.6 3.9
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
2024 Cutter BOS R 680 92.2 14.7 7.9 5.9GLV 3.1 17.5 9.2 5.9GLV 3.2
2024 Sinker BOS R 59 93.2 11.9 -9.2 5.9ARM -8.1 19.6 -12.3 5.9ARM -8.9
2024 Slider BOS R 62 82.2 43.1 2.9 8.3GLV 2.9 -2.6 4.2 8.3GLV 3.2
2023 Slider BOS R 86 84.1 42.3 4.8 7.2GLV 2.4 -3.8 5.3 7.2GLV 1.9
2023 Sinker BOS R 66 95.3 12.6 -7.2 10.4ARM -4.3 17.6 -10.0 10.4ARM -4.6
2023 Cutter BOS R 569 94.3 12.8 6.7 1.6GLV -0.7 18.1 10.2 1.6GLV -1.0
! 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 %
2024 Cutter 1.0 7 680 84.9 178 .215 .348 .286 28.2 28.1 26.2 .215 .383 .299 39.6
2024 Slider 4.4 3 62 7.7 16 .000 .000 .044 7.7 12.5 7.7 .121 .173 .160 15.4
2024 Sinker 1.6 1 59 7.4 21 .200 .200 .205 29.7 42.9 31.0 .226 .256 .236 36.4
2023 Cutter 0.8 4 569 78.9 148 .237 .356 .295 27.5 28.4 26.3 .205 .333 .269 36.6
2023 Slider -0.6 0 86 11.9 21 .250 .450 .317 37.5 19.0 10.3 .199 .326 .247 31.3
2023 Sinker -2.3 -2 66 9.2 17 .214 .500 .368 31.8 35.3 19.4 .194 .441 .341 37.5
! 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
2024 Cutter 673 92.2 80 18.1 11:45 11:15 30
2024 Sinker 57 93.2 98 20.0 12:15 12:30 -15
2024 Slider 61 82.2 45 10.4 8:30 8:00 30
2023 Cutter 558 94.3 79 17.8 12:15 11:45 30
2023 Sinker 63 95.3 98 20.3 12:45 1:00 -15
2023 Slider 86 84.1 49 9.6 8:45 7:45 60
! Note: Years are in reverse order.
+ Show More Seasons
▾
! Note: This table is showing data from the PITCHER perspective.
+ View Complete Spin Direction Leaderboard

Pitcher Arm Angle

! Note: Data is available from 2020 through the present.
+ View Complete Arm Angle Leaderboard

Swing/Take

Runs
Year Team PA Pitches Heart Shadow Chase Waste All
2010 107 478 11 5 -3 -3 11
2011 218 979 12 10 -4 -3 14
2012 251 1,047 11 9 -4 -2 15
2013 311 1,329 21 8 -2 -4 23
2014 263 1,054 10 6 -3 -2 11
2015 213 851 10 8 -3 -1 14
2016 294 1,168 17 15 -3 -2 27
2017 317 1,225 14 17 -1 -2 28
2018 325 1,285 9 20 -7 -4 17
2019 263 1,064 4 12 -3 -4 8
2020 131 565 5 5 -4 -1 5
2021 298 1,171 20 18 -11 -5 23
2022 264 1,030 6 7 -5 -1 7
2023 186 721 6 3 -4 -3 2
2024 215 801 12 5 -4 -2 11
+ View Complete Swing/Take Leaderboard

Plate Discipline

Season Pitches Zone % Zone Swing % Zone Contact % Chase % Chase Contact % Edge % 1st Pitch Strike % Swing % Whiff % Meatball % Meatball Swing %
2015 795 57.7 73.0 73.7 32.7 47.3 44.4 69.5 56.0 32.6 11.2 80.9
2016 1,002 57.9 74.1 71.9 31.8 48.5 44.3 68.5 56.3 33.5 9.4 79.8
2017 1,012 56.7 69.2 68.5 36.9 51.6 43.6 73.2 54.9 35.8 9.3 79.6
2018 1,141 52.4 71.9 74.1 30.0 63.8 43.5 65.6 52.0 28.2 7.4 84.5
2019 1,068 50.5 70.6 73.5 35.8 54.8 42.2 68.1 53.6 32.2 7.4 76.9
2020 446 50.4 70.7 71.7 34.4 63.2 45.1 66.7 52.7 30.6 7.6 73.5
2021 1,071 52.4 69.3 70.4 29.0 54.7 41.5 62.8 50.1 33.3 8.4 77.8
2022 1,006 55.8 67.6 76.8 29.2 56.9 45.0 68.7 50.6 27.5 9.3 76.6
2023 721 53.5 70.2 76.0 31.3 57.1 42.2 65.8 52.1 29.0 9.0 83.1
2024 801 57.8 67.4 79.8 24.9 44.0 44.4 68.1 49.4 27.0 8.9 78.9
Player 9,063 54.6 70.4 73.5 31.6 54.4 43.5 67.7 52.8 31.2 8.8 79.4
MLB 48.7 67.0 82.0 28.5 57.8 42.6 61.0 47.2 25.0 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
2015 63 99 99
2016 100 100 99 96 100 87 66 91 98 99 95 97 81 84 98 99
2017 100 99 99 96 100 88 80 99 99 100 99 97 99 77 87 99
2018 92 88 79 52 97 56 30 100 99 83 86 71 74 62 82 100
2019 93 87 88 81 93 74 67 96 99 87 78 87 98 48 68 99
2020 88 87 93 90 74 88 91 99 100 89 47 76 93 35 43 99
2021 93 96 97 96 72 92 92 99 99 89 8 90 60 57 76 99
2022 97 98 93 72 97 72 48 80 89 93 40 63 48 46 51 95
2023 73 56 90
2024 82 86 74 56 80 54 4 11 65 84 32 62 11 35 57 81
+ View Complete Percentile Rankings Leaderboard

Expected Home Runs

Adjusted
Year Team Avg HR Trot Actual HR xHR HR-xHR Doubters Mostly Gone No Doubters No Doubter %
2016 22.3 5 6.1 -1 3 5 2 40.0
2017 22.7 7 5.9 1 2 7 2 28.6
2018 21.8 15 10.9 4 6 7 5 33.3
2019 22.2 9 7.0 2 1 5 4 44.4
2020 25.8 3 3.5 -1 3 0 3 100.0
2021 23.1 4 3.3 1 2 2 2 50.0
2022 25.2 9 8.7 0 5 5 5 55.6
2023 24.9 5 4.6 0 4 2 3 60.0
2024 21.7 4 5.8 -2 2 6 2 50.0
Player 23.1 61 55.8 5 28 39 28 45.9
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.
+ View Standard Expected Home Runs

Expected Home Runs by Park

Adjusted
Year HR
2016 5 6 6 7 6 6 6 7 5 5 6 7 6 6 6 7 4 6 7 7 6 4 7 9 7 6 6 8 6 6 3
2017 7 9 4 5 5 5 8 5 5 3 7 8 6 6 5 7 5 5 8 5 7 7 7 9 5 3 4 7 8 5 3
2018 15 15 10 11 10 9 12 10 7 7 9 12 16 10 9 12 9 10 12 12 14 13 15 13 9 9 10 12 15 9 7
2019 9 9 8 6 7 5 8 8 5 5 5 5 8 8 7 8 6 6 8 7 9 7 9 9 7 6 5 7 9 6 6
2020 3 3 4 5 3 3 3 4 3 3 3 4 4 3 3 3 5 3 3 3 4 4 5 3 3 3 3 3 4 4 3
2021 4 3 3 5 3 3 4 5 3 3 3 4 3 2 4 4 2 3 3 3 3 3 5 4 2 3 4 3 3 3 3
2022 9 8 10 8 8 8 9 8 6 8 8 10 10 10 8 11 8 7 10 8 9 9 10 10 7 7 10 9 10 8 9
2023 5 3 4 7 4 4 4 4 5 4 4 5 5 4 5 6 5 4 5 5 5 4 6 6 4 4 4 4 5 4 5
2024 4 5 4 5 5 5 6 4 5 4 5 6 6 4 5 4 5 6 5 8 6 4 7 8 6 8 6 8 8 8 8
Player 61 61 53 59 51 48 60 55 44 42 50 61 64 53 52 62 49 50 61 58 63 55 71 71 50 49 52 61 68 53 47
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.