Mithrandir Metrics
Player Detroit Tigers Refreshed Sep 27 06:00 AM ET
Player profile / Detroit Tigers

Will Vest

P · Bats/Throws R/R · 6' 0", 180 lb · Age 31

Cards
0
Modules
0
Live Δ
yes
Club Detroit Tigers Position P Roster Current MLB team Status IL-60
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024342.82690270.1631.12
2025653.016402368.2751.21
2026356.08270226.2271.43
6 Seasons18183.78299630312.03111.26
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.

2026-09-27
44
Pitching
percentile
Pitching9 metrics
57
Arsenal5 metrics
56
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-27
ERA preseason3.24
ERA current pace6.08
ERA rolling p504.20
Observed weight34%
ERA
2.95 3.54 4.20 4.86 5.45
FIP
2.36 2.78 3.25 3.72 4.15
K%
18.6% 21.1% 24.0% 26.8% 29.3%
BB%
4.7% 5.8% 7.1% 8.3% 9.4%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-27
Pitching · percentile strip
WHIP1.45
29
ERA6.08
10
BB%8.1%
60 -24 vs proj
K%23.6%
62
xwOBA allowed0.307
58 -17 vs proj
Barrel allowed4.9%
86 +16 vs proj
Fastball velo95.7
70
Hard-hit allowed35.8%
70
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.

2026-09-27
Changeup Stuff+99
29
Fastball Stuff+110
95
Mithrandir Stuff+106
82
Sinker Stuff+96
16
Slider Stuff+103
60
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 Vest, Will · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.307 2026-09-13: 0.3072026-09-14: 0.3072026-09-18: 0.3072026-09-19: 0.3072026-09-20: 0.3072026-09-21: 0.3072026-09-22: 0.3072026-09-23: 0.3072026-09-24: 0.3072026-09-25: 0.3072026-09-26: 0.3072026-09-27: 0.307 2026-09-13 2026-09-27 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 44%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 Vest, Will · Aggregate zone metrics; not pitch-by-pitch locations Edge: 36%36%Zone: 46%46%Whiff: 24%24%Called strike: 17%17%First pitch strike: 58%58%Hard hit allowed: 36%36% 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 Vest, Will · 2026 arsenal snapshot 4-Seam Fastball: 44.0%Slider: 29.2%Sinker: 15.4%Changeup: 11.4% FF44% · 96 mphprimary pitch FF 44%SL 29%SI 15%CH 11% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Vest, Will · 2026 arsenal snapshot 12″24″36″48″ 4-Seam Fastball: 44% usage, 2″ horizontal break, 13″ drop, 95.8 mphFF96 mphSlider: 29% usage, 0″ horizontal break, 37″ drop, 87.7 mphSL88 mphSinker: 15% usage, 14″ horizontal break, 19″ drop, 95.3 mphSI95 mphChangeup: 11% usage, 15″ horizontal break, 29″ drop, 89.4 mphCH89 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 43.8% 176 110 limited sample
SL 27.9% 112 103 limited sample
SI 16.9% 68 96 limited sample
CH 11.4% 46 99 limited sample
Method note

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

Reference layer

Current snapshot

Age31
Height6' 0"
Weight180 lb
Debut2021-04-01
Live layer

Delta / regression

ERA Δ+2.86
K% Δ-0.013
Mithrandir coverage

Module shelf

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

Available detail

Pitcher Projections 202624.9% K | 3.22 ERAProjection
2026-05-20 vs CLE1 ER / 1 K1.0 IP
2026-04-17 @ BOS0 ER / 2 K1.1 IP
2026-04-14 vs KC0 ER / 3 K1.0 IP
2026-04-09 @ MIN2 ER / 1 K0.2 IP
2026-04-08 @ MIN0 ER / 1 K1.0 IP