Mithrandir Metrics
Player Washington Nationals Refreshed Sep 29 06:00 AM ET
Player profile / Washington Nationals

Will Dion

P · Bats/Throws L/L · 5' 10", 180 lb · Age 26

Cards
1
Modules
1
Live Δ
yes
Club Washington Nationals Position P Roster Current MLB team Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2026323.62271149.2551.19
1 Seasons323.62271149.2551.19
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.

2026-09-29
69
Pitching
percentile
Pitching9 metrics
62
Arsenal6 metrics
64
Rolling projection

Preseason / current pace / Bayesian update

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

Pending

Rolling player projection appears after current-season Statcast and projection joins refresh.

Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-29
Pitching · percentile strip
WHIP1.24
66
ERA3.78
60
BB%8.4%
56
K%27.2%
82
xwOBA allowed0.283
82
Barrel allowed7.0%
58
Fastball velo91.0
7
Hard-hit allowed32.8%
88
Whiff%24.4%
63
Mithrandir+

Stuff+ and arsenal context

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

2026-09-29
Fastball Stuff+111
97
Mithrandir Stuff+105
75
Changeup Stuff+100
39
Curveball Stuff+103
53
Cutter Stuff+103
64
Sinker Stuff+103
54
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 Dion, Will · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.283 2026-09-18: 0.2852026-09-19: 0.2852026-09-20: 0.2852026-09-21: 0.2872026-09-22: 0.2872026-09-23: 0.2872026-09-24: 0.2852026-09-25: 0.2852026-09-26: 0.2842026-09-27: 0.2842026-09-28: 0.2842026-09-29: 0.283 2026-09-18 2026-09-29 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.

5Pitches 2026Season 42%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 Dion, Will · Aggregate zone metrics; not pitch-by-pitch locations Edge: 35%35%Zone: 48%48%Whiff: 24%24%Called strike: 16%16%First pitch strike: 52%52%Hard hit allowed: 33%33% 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 Dion, Will · 2026 arsenal snapshot 4-Seam Fastball: 42.4%Changeup: 25.8%Curveball: 19.8%Cutter: 8.3%Sinker: 3.7% FF42% · 91 mphprimary pitch FF 42%CH 26%CU 20%FC 8%SI 4% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Dion, Will · 2026 arsenal snapshot 15″30″45″60″ 4-Seam Fastball: 42% usage, 0″ horizontal break, 13″ drop, 91.1 mphFF91 mphChangeup: 26% usage, 6″ horizontal break, 33″ drop, 78.0 mphCH78 mphCurveball: 20% usage, 0″ horizontal break, 51″ drop, 81.0 mphCU81 mphCutter: 8% usage, 2″ horizontal break, 28″ drop, 86.9 mphFC87 mphSinker: 4% usage, 3″ horizontal break, 17″ drop, 89.8 mphSI90 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 40.1% 203 111 qualified
CH 29.1% 147 100 limited sample
CB 19.2% 97 103 limited sample
FC 8.9% 45 103 limited sample
SI 2.8% 14 103 limited sample
Method note

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

Reference layer

Current snapshot

Age26
Height5' 10"
Weight180 lb
Debut2026-05-26
Live layer

Delta / regression

ERA Δ--
K% Δ--

positive regression

Regression watch

Unlucky so far. Better days ahead.

1.0σ gap
wOBA-against (actual)0.315
xwOBA-against (deserved)0.283

Dion’s wOBA-against sits at 0.315, but the quality of contact underneath says it should be 0.283 — a gap of 0.031, 1.0 standard deviations from the MLB norm over 48 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
Pitching12026-08-31Command and chase profile drove the outing
Projection links / recent games

Available detail

2026-08-15 @ NYM0 ER / 7 K4.1 IP