Mithrandir Metrics
Player Los Angeles Dodgers Refreshed Sep 28 06:00 AM ET
Player profile / Los Angeles Dodgers

Will Klein

P · Bats/Throws R/R · 6' 5", 230 lb · Age 26

Cards
2
Modules
1
Live Δ
yes
Club Los Angeles Dodgers Position P Roster Current MLB team Status IL-60
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
20241011.058007.172.45
2025112.35140015.1211.57
2026343.67363241.2491.56
3 Seasons554.20583264.1771.66
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.

2026-09-28
49
Pitching
percentile
Pitching9 metrics
56
Arsenal4 metrics
65
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-28
ERA preseason3.78
ERA current pace3.67
ERA rolling p503.73
Observed weight46%
ERA
1.97 2.81 3.73 4.66 5.49
FIP
2.27 2.88 3.57 4.25 4.87
K%
20.9% 22.8% 24.9% 27.0% 28.9%
BB%
8.4% 9.7% 11.1% 12.5% 13.8%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-28
Pitching · percentile strip
WHIP1.61
12
ERA3.67
63
BB%11.7%
21
K%25.2%
72
xwOBA allowed0.289
78
Barrel allowed3.2%
97 +29 vs proj
Fastball velo97.5
91
Hard-hit allowed41.6%
28
Whiff%21.6%
42
Mithrandir+

Stuff+ and arsenal context

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

2026-09-28
Fastball Stuff+104
63
Curveball Stuff+100
19
Mithrandir Stuff+105
81
Slider Stuff+112
98
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 Klein, Will · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.289 2026-09-14: 0.2882026-09-18: 0.2892026-09-19: 0.2892026-09-20: 0.2892026-09-21: 0.2892026-09-22: 0.2892026-09-23: 0.2892026-09-24: 0.2892026-09-25: 0.2892026-09-26: 0.2892026-09-27: 0.2892026-09-28: 0.289 2026-09-14 2026-09-28 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.

4Pitches 2026Season 51%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 Klein, Will · Aggregate zone metrics; not pitch-by-pitch locations Edge: 37%37%Zone: 48%48%Whiff: 22%22%Called strike: 19%19%First pitch strike: 52%52%Hard hit allowed: 42%42% 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 Klein, Will · 2026 arsenal snapshot 4-Seam Fastball: 51.5%Sweeper: 27.5%Curveball: 15.7%Slider: 5.4% FF51% · 97 mphprimary pitch FF 51%ST 27%CU 16%SL 5% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Klein, Will · 2026 arsenal snapshot 15″30″45″60″ 4-Seam Fastball: 51% usage, 0″ horizontal break, 13″ drop, 97.5 mphFF97 mphSweeper: 27% usage, 7″ horizontal break, 38″ drop, 88.6 mphST89 mphCurveball: 16% usage, 7″ horizontal break, 51″ drop, 85.0 mphCU85 mphSlider: 5% usage, 2″ horizontal break, 28″ drop, 91.0 mphSL91 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 51.9% 248 104 qualified
SL 31.2% 149 112 limited sample
CB 16.9% 81 100 limited sample
Method note

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

Reference layer

Current snapshot

Age26
Height6' 5"
Weight230 lb
Debut2024-04-28
Live layer

Delta / regression

ERA Δ-0.11
K% Δ+0.000

positive regression

Regression watch

Unlucky so far. Better days ahead.

2.5σ gap
wOBA-against (actual)0.369
xwOBA-against (deserved)0.289

Klein’s wOBA-against sits at 0.369, but the quality of contact underneath says it should be 0.289 — a gap of 0.081, 2.5 standard deviations from the MLB norm over 45 IP. The results have been worse than the process deserves; as the sample grows, expect the numbers to climb back toward the underlying level.

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching22026-07-19Command and chase profile drove the outing
Projection links / recent games

Available detail

Pitcher Projections 202625.2% K | 3.78 ERAProjection
2026-05-20 @ SD0 ER / 1 K1.0 IP
2026-04-12 vs TEX0 ER / 4 K2.0 IP
2026-04-06 @ TOR0 ER / 2 K2.0 IP
2026-04-01 vs CLE1 ER / 1 K1.2 IP
2026-03-26 vs AZ0 ER / 1 K1.0 IP