Mithrandir Metrics
Player New York Yankees Refreshed Sep 26 06:00 AM ET
Player profile / New York Yankees

Brent Headrick

P · Bats/Throws L/L · 6' 6", 235 lb · Age 28

Cards
0
Modules
0
Live Δ
yes
Club New York Yankees Position P Roster Current MLB team Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024003.001003.051.33
2025003.13170023.0301.04
2026742.18810078.1981.21
4 Seasons1043.1811301130.01631.23
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.

2026-09-26
80
Pitching
percentile
Pitching9 metrics
76
Arsenal4 metrics
47
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-26
ERA preseason3.96
ERA current pace1.90
ERA rolling p502.76
Observed weight58%
ERA
1.33 2.01 2.76 3.51 4.18
FIP
2.04 2.56 3.14 3.72 4.25
K%
26.1% 27.4% 28.9% 30.4% 31.8%
BB%
6.3% 7.1% 8.0% 8.9% 9.7%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-26
Pitching · percentile strip
WHIP1.23
68
ERA1.90
97
BB%8.3%
57
K%30.0%
93
xwOBA allowed0.271
88 +45 vs proj
Barrel allowed4.8%
88 +65 vs proj
Fastball velo94.0
43
Hard-hit allowed37.2%
60
Whiff%29.2%
91
Mithrandir+

Stuff+ and arsenal context

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

2026-09-26
Fastball Stuff+107
86
Mithrandir Stuff+103
61
Slider Stuff+96
15
Sinker Stuff+99
26
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 Headrick, Brent · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.271 2026-09-12: 0.2692026-09-13: 0.2692026-09-14: 0.2692026-09-18: 0.2662026-09-19: 0.2662026-09-20: 0.2662026-09-21: 0.2662026-09-22: 0.2662026-09-23: 0.2662026-09-24: 0.2672026-09-25: 0.2672026-09-26: 0.271 2026-09-12 2026-09-26 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.

4Pitches 2026Season 49%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 Headrick, Brent · Aggregate zone metrics; not pitch-by-pitch locations Edge: 37%37%Zone: 48%48%Whiff: 29%29%Called strike: 15%15%First pitch strike: 53%53%Hard hit allowed: 37%37% 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 Headrick, Brent · 2026 arsenal snapshot 4-Seam Fastball: 48.8%Slider: 30.2%Split-Finger: 12.4%Sinker: 8.6% FF49% · 94 mphprimary pitch FF 49%SL 30%FS 12%SI 9% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Headrick, Brent · 2026 arsenal snapshot 9″18″27″36″ 4-Seam Fastball: 49% usage, 5″ horizontal break, 14″ drop, 94.1 mphFF94 mphSlider: 30% usage, 0″ horizontal break, 34″ drop, 84.3 mphSL84 mphSplit-Finger: 12% usage, 9″ horizontal break, 34″ drop, 84.7 mphFS85 mphSinker: 9% usage, 11″ horizontal break, 18″ drop, 93.4 mphSI93 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 55.3% 381 107 qualified
SL 33.5% 231 96 qualified
SI 11.2% 77 99 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' 6"
Weight235 lb
Debut2023-04-19
Live layer

Delta / regression

ERA Δ-1.70
K% Δ+0.031

positive regression

Regression watch

Unlucky so far. Better days ahead.

1.5σ gap
wOBA-against (actual)0.313
xwOBA-against (deserved)0.271

Headrick’s wOBA-against sits at 0.313, but the quality of contact underneath says it should be 0.271 — a gap of 0.042, 1.5 standard deviations from the MLB norm over 81 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 202626.9% K | 3.60 ERAProjection
2026-08-15 @ TOR1 ER / 1 K1.0 IP
2026-04-17 vs KC0 ER / 1 K1.0 IP
2026-04-15 vs LAA0 ER / 0 K1.0 IP
2026-04-14 vs LAA0 ER / 0 K1.0 IP
2026-04-12 @ TB1 ER / 0 K1.0 IP