Mithrandir Metrics
Player Detroit Tigers Refreshed Jun 1 06:00 AM ET
Player profile / Detroit Tigers

Kenley Jansen

P profile with live context, projection links, and Mithrandir card history when available.

Cards
0
Modules
0
Live Δ
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Club Detroit Tigers Position P Roster Injured 15-Day Status IL-15
Rolling projection

Preseason / current pace / Bayesian update

Rolling bands shrink current-season signal toward the preseason prior until the sample earns more weight.

2026-06-01
ERA preseason3.84
ERA current pace4.80
ERA rolling p504.06
Observed weight23%
ERA
2.45 3.21 4.06 4.90 5.66
FIP
3.68 3.92 4.20 4.47 4.71
K%
19.5% 22.2% 25.2% 28.3% 31.0%
BB%
7.0% 8.4% 10.0% 11.6% 13.0%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-01
Mithrandir+

Stuff+ and arsenal context

Stuff+ appears when the current pitch-event scoring artifact includes this pitcher; missing coverage is shown explicitly.

2026-06-01
Mithrandir Stuff+105
74
Rolling form chart

xwOBA allowed snapshot line

Live snapshot series; true 50/100 PA windows require PA-level logs

0 snapshots
No chart yet

No Live State xwOBA snapshots are available for this player.

Optimization map

Arsenal optimization map

Pitch-shape context from this pitcher’s current arsenal snapshot. Hover a pitch to inspect usage, movement, and bat-missing context.

3Pitches 2026Season 78%Top usage
ride armside gloveside +Arsenal gap +Shape contrast
Zone profile

Aggregate zone heatmap

Aggregate zone metrics from seasonal Statcast leaderboards.

Mithrandir Metrics ZONE HEATMAP Parameterized Mithrandir chart rendered as SVG for templates and exports. season=2026 Pitch Zone Profile Jansen, Kenley · Aggregate zone metrics; not pitch-by-pitch locations Edge: 38%38%Zone: 48%48%Whiff: 28%28%Called strike: 18%18%First pitch strike: 60%60%Hard hit allowed: 31%31% Dashed border = aggregate mixed-batter zone proxy MITHRANDIR · CHARTS
Pitch arsenal

Usage mix, movement map, and Stuff+ composition

2026 pitch-level arsenal aggregates; current season takes over after 100 tracked pitches across at least 2 pitch types. Descriptive pitch-type Stuff+ composition. Not a promoted predictive metric.

2026
Mithrandir Metrics PITCH ARSENAL DONUT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Jansen, Kenley · 2026 arsenal snapshot Cutter: 78.1%Slider: 11.3%Sinker: 10.6% MIX FC 78%SL 11%SI 11% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Jansen, Kenley · 2026 arsenal snapshot FC: HB 0.1, IVB 1.2FCSL: HB -0.1, IVB 3.4SLSI: HB -0.3, IVB 1.0SI horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FC 79.5% 210 103 qualified
SI 10.2% 27 102 limited sample
SL 10.2% 27 101 limited sample
Method note

Renamed from the attempted Kirby Index after audit; true Kirby requires release-angle trajectory data.

Reference layer

Current snapshot

Age38
Height6' 5"
Weight265 lb
Debut2010-07-24
Live layer

Delta / regression

No Live State delta is available for this profile yet.

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
No Mithrandir card history is available for this player yet.
Projection links / recent games

Available detail

Pitcher Projections 202622.5% K | 3.81 ERAProjection
2026-05-20 vs CLE0 ER / 1 K1.0 IP
2026-04-15 vs KC0 ER / 1 K1.0 IP
2026-04-14 vs KC0 ER / 0 K1.0 IP
2026-04-04 vs STL0 ER / 1 K0.1 IP
2026-03-31 @ AZ1 ER / 1 K0.1 IP