Kenley Jansen
RPQualifiedDetroit Tigers · AL · Age 38 · Bats S / Throws R · 25.7 IP · 109 BF
— NeutralHOLDRank 542 of 617 pitchers by opportunity score
Opportunity Score
2
−7.0 last 7 days
HOLDProduction matches the underlying process.
Most likely driver: arm slot raised — pitch-design change or new mechanics (28% confidence).Mechanical flag: arm angle +11.9°.
W-L
2-4
SV
11
IP
25.7
K
29
BB
16
ERA
4.21
WHIP
1.29
Edge breakdown
Expected
What the batted-ball quality deserves
xERA3.75
xwOBA.300
xBA.210
xSLG.345
xBABIP.281
Actual
What the scoreboard says
ERA4.21
wOBA.294
BA.185
SLG.359
BABIP.281
Difference
Actual − expected · percentile of the gap
ERA vs xERA+0.4668
wOBA against vs xwOBA−.00641
BA against vs xBA−.02519
SLG against vs xSLG+.01456
BABIP against vs xBABIP+.00050
Arsenal & pitch shapes
2026 usage, velocity, and movement per pitch · dashed ring = league average for that pitch type · movement in inches, pitcher's perspective
| Pitch | Usage | Velo | vs 2025 | Velo pctl | Spin | IVB | HB |
|---|---|---|---|---|---|---|---|
| Cutter | 83.8%(+2.4) | 92.4lg 89.5 | −0.4 | 8935 | 2656 | 16.8"lg 7.9 | 5.8"lg 2.4 |
| Slider | 9.3%(+3.2) | 84.4lg 86.2 | +0.5 | 2067 | 2509 | -3.1"lg 1.5 | 5.2"lg 4.1 |
| Sinker | 6.9%(−2.3) | 93.7lg 94.0 | +0.5 | 4357 | 2365 | 20.0"lg 8.4 | 5.7"lg 15.0 |
IVB = induced vertical break (rise vs gravity-only). HB = horizontal break. Velo percentile is against all pitchers throwing the same pitch type. Sources: Savant pitch arsenals & movement leaderboards.
Mechanics Watch
2026 in gold · 2025 dashed · thin ticks = league average
Arm Angle +11.9°
Arm slot
99 pctl · +11.9° vs prior
What this can't see: Joint kinetics, hip-shoulder separation, and kinematic sequencing (Hawkeye/KinaTrax, team-internal — never estimated here). Stance angle and foot separation (Savant visuals only, no export). Release extension (column exported empty; needs pitch-level ingest).
Recent games
Percentile rankings
xERA
67
xwOBA Against
67
K%
80
BB%
7
Whiff%
68
FB Velocity
37
Hard-Hit% Against
89
Spin Rate
71
30-day rolling trends
Rolling ERA vs xERA
ERAxERA
Rolling Hard-Hit% Against
Rolling FB Velocity
Rolling Stuff Index
Rolling Whiff%