Mithrandir Metrics
Player Colorado Rockies Refreshed Jun 2 06:00 AM ET
Player profile / Colorado Rockies

Seth Halvorsen

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

Cards
0
Modules
0
Live Δ
--
Club Colorado Rockies Position P Roster Active Status Healthy / active roster
Rolling projection

Preseason / current pace / Bayesian update

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

2026-06-02
ERA preseason3.67
ERA current pace3.86
ERA rolling p503.72
Observed weight23%
ERA
1.98 2.80 3.72 4.63 5.45
FIP
2.93 3.38 3.88 4.38 4.83
K%
16.8% 19.8% 23.2% 26.7% 29.7%
BB%
8.4% 9.9% 11.7% 13.4% 15.0%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-02
Mithrandir+

Stuff+ and arsenal context

Stuff+ appears when the current pitch-event scoring artifact includes this pitcher; missing coverage is shown explicitly.

2026-06-02
Mithrandir Stuff+100
36
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.

4Pitches 2026Season 59%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 Halvorsen, Seth · Aggregate zone metrics; not pitch-by-pitch locations Edge: 34%34%Zone: 48%48%Whiff: 20%20%Called strike: 15%15%First pitch strike: 46%46%Hard hit allowed: 44%44% 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 Halvorsen, Seth · 2026 arsenal snapshot 4-Seam Fastball: 58.6%Slider: 27.8%Split-Finger: 12.8%Sinker: 0.7% MIX FF 59%SL 28%FS 13%SI 1% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Halvorsen, Seth · 2026 arsenal snapshot FF: HB 0.1, IVB 1.1FFSL: HB -0.1, IVB 3.2SLFS: HB 0.1, IVB 2.4FSSI: HB 1.3, IVB 1.6SI horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 68.2% 118 100 limited sample
SL 31.8% 55 100 limited sample
Method note

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

Reference layer

Current snapshot

Age26
Height6' 2"
Weight243 lb
Debut2024-08-30
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 202623.4% K | 4.40 ERAProjection
2026-03-21 @ KC1 ER / 1 K1.0 IP
2026-03-19 vs SF4 ER / 0 K0.1 IP