Mithrandir Metrics
Player Detroit Tigers Refreshed Jul 17 06:00 AM ET
Player profile / Detroit Tigers

Kenley Jansen

P · Bats/Throws S/R · 6' 5", 265 lb · Age 38

Cards
0
Modules
0
Live Δ
yes
Club Detroit Tigers Position P Roster Active Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024423.295402754.2621.06
2025542.596202959.0570.95
2026144.562701123.2251.23
17 Seasons55442.629600487951.013030.97
At a glance

Season percentile report

The headline weighs outcome stats (xwOBA, barrels); each bar averages its full strip group below. 100 = best in MLB.

2026-07-17
49
Pitching
percentile
Pitching9 metrics
57
Arsenal4 metrics
60
Rolling projection

Preseason / current pace / Bayesian update

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

2026-07-17
ERA preseason3.84
ERA current pace4.56
ERA rolling p504.06
Observed weight31%
ERA
2.56 3.27 4.06 4.85 5.57
FIP
3.77 4.00 4.25 4.51 4.74
K%
19.1% 21.6% 24.3% 27.0% 29.5%
BB%
7.3% 8.6% 10.1% 11.5% 12.9%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-07-17
Pitching · percentile strip
WHIP1.21
69
ERA4.56
35
BB%13.1%
11 -34 vs proj
K%25.2%
69 +19 vs proj
xwOBA allowed0.304
61
Barrel allowed6.1%
75 +40 vs proj
Fastball velo93.4
32
Hard-hit allowed27.3%
98
Whiff%24.4%
61 +16 vs proj
Mithrandir+

Stuff+ and arsenal context

How nasty this pitcher's stuff grades in our pitch-level model. Missing coverage is shown explicitly.

2026-07-17
Cutter Stuff+103
66
Mithrandir Stuff+105
75
Sinker Stuff+102
50
Slider Stuff+102
48
Rolling form chart

xwOBA allowed snapshot line

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

12 snapshots
Mithrandir Metrics ROLLING XWOBA LINE Parameterized Mithrandir chart rendered as SVG for templates and exports. season=2026 Rolling xwOBA allowed Jansen, Kenley · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.314 0.304 2026-07-06: 0.3072026-07-07: 0.2982026-07-08: 0.2982026-07-09: 0.2982026-07-10: 0.2982026-07-11: 0.3062026-07-12: 0.3062026-07-13: 0.3042026-07-14: 0.3042026-07-15: 0.3042026-07-16: 0.3042026-07-17: 0.304 2026-07-06 2026-07-17 xwOBA allowed MITHRANDIR · CHARTS
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 82%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: 39%39%Zone: 48%48%Whiff: 24%24%Called strike: 15%15%First pitch strike: 50%50%Hard hit allowed: 27%27% 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.

Watch the pitches in 3D →

2026
Mithrandir Metrics PITCH ARSENAL DONUT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Jansen, Kenley · 2026 arsenal snapshot Cutter: 81.6%Slider: 10.4%Sinker: 8.0% FC82% · 92 mphprimary pitch FC 82%SL 10%SI 8% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Jansen, Kenley · 2026 arsenal snapshot 12″24″36″48″ Cutter: 82% usage, 0″ horizontal break, 15″ drop, 92.2 mphFC92 mphSlider: 10% usage, 1″ horizontal break, 41″ drop, 84.0 mphSL84 mphSinker: 8% usage, 4″ horizontal break, 12″ drop, 93.4 mphSI93 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FC 80.3% 220 103 qualified
SI 9.9% 27 102 limited sample
SL 9.9% 27 102 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

ERA Δ+0.75
K% Δ+0.027
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