Mithrandir Metrics
Player San Francisco Giants Refreshed Jun 1 06:00 AM ET
Player profile / San Francisco Giants

José Buttó

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

Cards
0
Modules
0
Live Δ
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Club San Francisco Giants Position P Roster Injured 60-Day Status IL-60
Rolling projection

Preseason / current pace / Bayesian update

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

2026-06-01
ERA preseason3.43
ERA current pace22.50
ERA rolling p504.62
Observed weight6%
ERA
3.02 3.78 4.62 5.47 6.23
FIP
3.33 3.99 4.71 5.44 6.09
K%
18.3% 21.4% 24.8% 28.3% 31.4%
BB%
7.5% 9.4% 11.5% 13.6% 15.5%
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+81
5
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 2025Season 31%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 Buttó, José · Aggregate zone metrics; not pitch-by-pitch locations Edge: 41%41%Zone: 30%30%Whiff: 41%41%Called strike: 13%13%First pitch strike: 12%12%Hard hit allowed: 43%43% Dashed border = aggregate mixed-batter zone proxy MITHRANDIR · CHARTS
Pitch arsenal

Usage mix, movement map, and Stuff+ composition

2025 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.

2025
Mithrandir Metrics PITCH ARSENAL DONUT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Buttó, José · 2025 arsenal snapshot 4-Seam Fastball: 30.8%Slider: 29.9%Sinker: 17.0%Changeup: 15.1%Sweeper: 7.0% MIX FF 31%SL 30%SI 17%CH 15%ST 7% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Buttó, José · 2025 arsenal snapshot FF: HB 0.0, IVB 1.3FFSL: HB -0.1, IVB 3.1SLSI: HB 0.2, IVB 1.7SICH: HB -0.6, IVB 2.7CHST: HB -0.0, IVB 3.7ST horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
SI 39.7% 25 90 limited sample
FB 25.4% 16 68 limited sample
SL 20.6% 13 96 limited sample
CH 12.7% 8 82 limited sample
CB 1.6% 1 89 limited sample
Method note

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

Reference layer

Current snapshot

Age28
Height6' 0"
Weight208 lb
Debut2022-08-21
Live layer

Delta / regression

No Live State delta is available for this profile yet.

Mithrandir coverage

Module shelf

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

Available detail

Pitcher Projections 202623.0% K | 3.83 ERAProjection
2026-04-01 @ SD4 ER / 1 K0.1 IP
2026-03-31 @ SD0 ER / 2 K1.0 IP
2026-03-27 vs NYY1 ER / 2 K0.2 IP