Mithrandir Metrics
Player Oklahoma City Comets Refreshed Sep 28 06:00 AM ET
Player profile / Oklahoma City Comets

Seth Halvorsen

P · Bats/Throws R/R · 6' 2", 243 lb · Age 26

Cards
0
Modules
0
Live Δ
yes
Club Oklahoma City Comets Position P Roster Current MLB team Status Out / inactive
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024211.46120212.1130.81
2025124.994201139.2361.56
2026125.90320029.0231.72
3 Seasons454.788601381.0721.51
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.

2026-09-28
8
Pitching
percentile
Pitching9 metrics
29
Arsenal3 metrics
39
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-28
ERA preseason3.42
ERA current pace5.90
ERA rolling p504.40
Observed weight39%
ERA
2.94 3.63 4.40 5.16 5.85
FIP
3.94 4.35 4.80 5.25 5.65
K%
15.6% 18.0% 20.8% 23.5% 26.0%
BB%
8.7% 10.0% 11.4% 12.9% 14.2%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-28
Pitching · percentile strip
WHIP1.85
2
ERA5.90
12
BB%12.9%
12 -17 vs proj
K%15.5%
8 -51 vs proj
xwOBA allowed0.375
4 -68 vs proj
Barrel allowed6.4%
68 +25 vs proj
Fastball velo98.7
98
Hard-hit allowed40.4%
36
Whiff%18.8%
18 -64 vs proj
Mithrandir+

Stuff+ and arsenal context

How nasty this pitcher's stuff grades in our pitch-level model. Missing coverage is shown explicitly.

2026-09-28
Fastball Stuff+100
35
Mithrandir Stuff+101
42
Slider Stuff+101
40
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 Halvorsen, Seth · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.375 2026-09-14: 0.3732026-09-18: 0.3792026-09-19: 0.3792026-09-20: 0.3792026-09-21: 0.3752026-09-22: 0.3752026-09-23: 0.3752026-09-24: 0.3752026-09-25: 0.3752026-09-26: 0.3752026-09-27: 0.3752026-09-28: 0.375 2026-09-14 2026-09-28 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.

5Pitches 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: 35%35%Zone: 44%44%Whiff: 19%19%Called strike: 12%12%First pitch strike: 41%41%Hard hit allowed: 40%40% 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 Halvorsen, Seth · 2026 arsenal snapshot 4-Seam Fastball: 58.9%Slider: 28.7%Split-Finger: 10.1%Sinker: 2.1%Other: 0.2% FF59% · 99 mphprimary pitch FF 59%SL 29%FS 10%SI 2%FA 0% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Halvorsen, Seth · 2026 arsenal snapshot 6″12″18″24″ 4-Seam Fastball: 59% usage, 0″ horizontal break, 1″ drop, 98.9 mphFF99 mphSlider: 29% usage, 0″ horizontal break, 3″ drop, 86.7 mphSL87 mphSplit-Finger: 10% usage, 0″ horizontal break, 2″ drop, 90.3 mphFS90 mphSinker: 2% usage, 1″ horizontal break, 2″ drop, 98.0 mphSI98 mphOther: 0% usage, 0″ horizontal break, 21″ drop, 32.6 mphFA33 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 67.8% 225 100 qualified
SL 30.4% 101 101 limited sample
SI 1.8% 6 90 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

ERA Δ+1.80
K% Δ-0.078

positive regression

Regression watch

Unlucky so far. Better days ahead.

1.7σ gap
wOBA-against (actual)0.436
xwOBA-against (deserved)0.375

Halvorsen’s wOBA-against sits at 0.436, but the quality of contact underneath says it should be 0.375 — a gap of 0.061, 1.7 standard deviations from the MLB norm over 31 IP. The results have been worse than the process deserves; as the sample grows, expect the numbers to climb back toward the underlying level.

Mithrandir coverage

Module shelf

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

Available detail

Pitcher Projections 202623.3% K | 4.10 ERAProjection
2026-03-21 @ KC1 ER / 1 K1.0 IP
2026-03-19 vs SF4 ER / 0 K0.1 IP