Players · J · Pitcher · 2026
Kenley Jansen
- Age
- 39
- B/T
- S/R
- Height
- 6' 5"
- Weight
- 265 lb
- Number
- #74
- Born
- September 30, 1987 in Willemstad, Curaçao
- MLB debut
- July 24, 2010
- Salary, 2026
- $9M
- dbWAR
- 13.4 15 season(s)
- IP
- 45.0
- ERA
- 3.20
- FIP
- 4.46
- K/9
- 10.2
- FIP−
- 107 100 = avg
Kenley Jansen is a relief pitcher for the Detroit Tigers. In 2026 he struck out 51 batters over 45.0 innings across 50 appearances, going 4-6. His ERA of 3.20 is 23.4% lower than the league average of 4.18 — 6th of 20 on his team, and 121st of 538 among MLB pitchers with 20+ innings. Stripping out defence, his 4.46 FIP suggests that his ERA had some help behind him. He missed bats on 26.6% of swings (13.0% of every pitch he threw), walked 12.8% of the batters he faced and struck out 28.3%. His 0.1 dbWAR is built from that FIP rather than runs allowed, so it credits him for what he controls and not for the defence behind him.
League context
Percentile among qualified pitchers, 2026.
WAR by season
Pitching
Standard and advanced, by season.
| Trend | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | DET | 50 | 0 | 45.0 | 4 | 6 | 22 | 24 | 16 | 51 | 23 | 3.20 | 4.46 | 1.04 | 10.2 | 4.6 | 77 | 107 | 0.1 | |
| 2025 | LAA | 62 | 0 | 59.0 | 5 | 4 | 29 | 37 | 17 | 57 | 19 | 2.59 | 3.98 | 0.95 | 8.7 | 2.9 | 62 | 96 | 0.5 | |
| 2024 | BOS | 54 | 0 | 54.2 | 4 | 2 | 27 | 38 | 20 | 62 | 20 | 3.29 | 3.00 | 1.06 | 10.2 | 3.3 | 81 | 74 | 1.0 | |
| 2023 | BOS | 51 | 0 | 44.2 | 3 | 6 | 29 | 40 | 18 | 52 | 17 | 3.63 | 3.66 | 1.28 | 10.5 | 3.4 | 84 | 84 | 0.7 | |
| 2022 | ATL | 65 | 0 | 64.0 | 5 | 2 | 41 | 45 | 24 | 85 | 22 | 3.38 | 3.21 | 1.05 | 12.0 | 3.1 | 85 | 81 | 0.9 | |
| 2021 | LAD | 69 | 0 | 69.0 | 4 | 4 | 38 | 36 | 17 | 86 | 36 | 2.22 | 3.08 | 1.04 | 11.2 | 4.7 | 52 | 72 | 1.3 | |
| 2020 | LAD | 27 | 0 | 24.1 | 3 | 1 | 11 | 19 | 9 | 33 | 9 | 3.33 | 3.03 | 1.15 | 12.2 | 3.3 | 75 | 68 | 0.5 | |
| 2019 | LAD | 62 | 0 | 63.0 | 5 | 3 | 33 | 51 | 26 | 80 | 16 | 3.71 | 3.48 | 1.06 | 11.4 | 2.3 | 82 | 77 | 1.0 | |
| 2018 | LAD | 69 | 0 | 71.2 | 1 | 5 | 38 | 54 | 24 | 82 | 17 | 3.01 | 4.03 | 0.99 | 10.3 | 2.1 | 73 | 97 | 0.5 | |
| 2017 | LAD | 65 | 0 | 68.1 | 5 | 0 | 41 | 44 | 10 | 109 | 7 | 1.32 | 1.31 | 0.75 | 14.4 | 0.9 | 30 | 30 | 2.7 | |
| 2016 | LAD | 72 | 0 | 68.2 | 3 | 2 | 47 | 35 | 14 | 104 | 11 | 1.83 | 1.44 | 0.67 | 13.6 | 1.4 | 44 | 34 | 2.5 | |
| 2015 | LAD | 54 | 0 | 52.1 | 2 | 1 | 36 | 33 | 14 | 80 | 8 | 2.41 | 2.14 | 0.78 | 13.8 | 1.4 | 61 | 54 | 1.4 |
Batting
Standard and advanced, by season.
Platoon splits
How left- and right-handed hitters fare against him.
| Split | PA | AB | H | HR | BB | SO | AVG | OBP | SLG | wOBA | K% |
|---|---|---|---|---|---|---|---|---|---|---|---|
| vs LHB | 100 | 83 | 10 | 4 | 17 | 30 | .120 | .270 | .277 | .257 | 30.0% |
| vs RHB | 80 | 71 | 14 | 3 | 6 | 21 | .197 | .263 | .338 | .267 | 26.3% |
Pitch sequencing
What Kenley Jansen throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Kenley Jansen throws in it.
Pitch arsenal
What he throws, how hard, how often it misses, and what hitters do with it.
| Cutter | 600 | 92.5 | 2,660 | 51.2% | 24.9% | 114 | .167 | .610 | |
| Slider | 76 | 84.5 | 2,515 | 44.7% | 35.0% | 21 | .095 | .269 | |
| Sinker | 49 | 93.9 | 2,360 | 49.0% | 31.0% | 19 | .158 | .624 |
Head to head
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Similar players
Nearest 2026 seasons by command, run prevention and role, on rate statistics rather than totals.
wOBA uses linear weights measured from this season's own play-by-play rather than published constants, and wRC+ is park-adjusted against that same league. dbWAR is our own open implementation — not fWAR or bWAR — and the full derivation, including its simplifications, is on the methodology page.