Mithrandir Metrics
Player Colorado Rockies Refreshed Jun 1 06:00 AM ET
Player profile / Colorado Rockies

Welinton Herrera

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

Cards
0
Modules
0
Live Δ
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Club Colorado Rockies 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 preseason3.14
ERA current pace0.00
ERA rolling p503.01
Observed weight4%
ERA
0.70 1.80 3.01 4.23 5.32
FIP
1.25 2.29 3.44 4.59 5.63
K%
6.4% 10.9% 15.8% 20.8% 25.2%
BB%
0.8% 3.4% 6.3% 9.2% 11.8%
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
90
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.

3Pitches 2025Season 67%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 Herrera, Welinton · Aggregate zone metrics; not pitch-by-pitch locations Edge: 31%31%Zone: 53%53%Whiff: 19%19%Called strike: 16%16%First pitch strike: 50%50%Hard hit allowed: 57%57% 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 Herrera, Welinton · 2025 arsenal snapshot Sinker: 66.7%4-Seam Fastball: 16.7%Slider: 16.7% MIX SI 67%FF 17%SL 17% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Herrera, Welinton · 2025 arsenal snapshot SI: HB -1.1, IVB 1.6SIFF: HB -0.6, IVB 1.1FFSL: HB 0.0, IVB 2.7SL horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 63.0% 17 115 limited sample
CH 22.2% 6 101 limited sample
SL 14.8% 4 76 limited sample
Method note

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

Reference layer

Current snapshot

Age22
Height6' 0"
Weight198 lb
Debut2026-05-25
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 202622.3% K | 3.68 ERAProjection