Mithrandir Metrics
Player Louisville Bats Refreshed Jun 1 06:00 AM ET
Player profile / Louisville Bats

Chase Petty

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

Cards
2
Modules
1
Live Δ
--
Club Louisville Bats Position P Roster Reassigned to Minors Status Out / inactive
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 preseason7.45
ERA current pace5.91
ERA rolling p507.20
Observed weight16%
ERA
3.90 5.46 7.20 8.94 10.51
FIP
2.82 3.50 4.26 5.01 5.69
K%
8.8% 12.8% 17.4% 21.9% 26.0%
BB%
6.3% 7.7% 9.3% 10.9% 12.3%
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+108
93
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.

5Pitches 2026Season 27%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 Petty, Chase · Aggregate zone metrics; not pitch-by-pitch locations Edge: 37%37%Zone: 50%50%Whiff: 14%14%Called strike: 15%15%First pitch strike: 47%47%Hard hit allowed: 41%41% 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 Petty, Chase · 2026 arsenal snapshot Sinker: 27.0%Changeup: 24.8%Slider: 19.0%Sweeper: 15.3%4-Seam Fastball: 13.9% MIX SI 27%CH 25%SL 19%ST 15%FF 14% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Petty, Chase · 2026 arsenal snapshot SI: HB 0.4, IVB 1.5SICH: HB -0.5, IVB 2.8CHSL: HB -0.0, IVB 2.5SLST: HB -0.4, IVB 2.9STFF: HB -0.4, IVB 1.4FF horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
SL 34.3% 47 109 limited sample
SI 27.0% 37 103 limited sample
CH 24.8% 34 108 limited sample
FB 13.9% 19 110 limited sample
Method note

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

Reference layer

Current snapshot

Age23
Height6' 1"
Weight190 lb
Debut2025-04-30
Live layer

Delta / regression

No Live State delta is available for this profile yet.

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching22026-05-23Sinker played up through SL/FF tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202622.1% K | 5.96 ERAProjection