Mithrandir Metrics
Player New York Yankees Refreshed Sep 1 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
2026731.97700068.2861.21
4 Seasons1033.1410201120.11511.23
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.

2026-09-01
84
Pitching
percentile
Pitching9 metrics
77
Arsenal4 metrics
61
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-01
ERA preseason3.96
ERA current pace1.49
ERA rolling p502.59
Observed weight55%
ERA
1.18 1.85 2.59 3.34 4.01
FIP
1.99 2.51 3.08 3.66 4.18
K%
25.9% 27.3% 28.9% 30.5% 31.9%
BB%
5.8% 6.6% 7.5% 8.4% 9.3%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-01
Pitching · percentile strip
WHIP1.23
68
ERA1.49
98
BB%7.4%
71 +22 vs proj
K%30.1%
93
xwOBA allowed0.267
91 +48 vs proj
Barrel allowed4.9%
87 +64 vs proj
Fastball velo94.1
44
Hard-hit allowed37.5%
56
Whiff%29.3%
91
Mithrandir+

Stuff+ and arsenal context

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

2026-09-01
Fastball Stuff+108
88
Mithrandir Stuff+104
71
Sinker Stuff+104
65
Slider Stuff+97
19
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 0.267 2026-08-21: 0.2742026-08-22: 0.2742026-08-23: 0.2742026-08-24: 0.2742026-08-25: 0.2672026-08-26: 0.2672026-08-27: 0.2692026-08-28: 0.2692026-08-29: 0.2692026-08-30: 0.2672026-08-31: 0.2672026-09-01: 0.267 2026-08-21 2026-09-01 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 50%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: 14%14%First pitch strike: 52%52%Hard hit allowed: 38%38% 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: 49.8%Slider: 31.0%Split-Finger: 10.4%Sinker: 8.8% FF50% · 94 mphprimary pitch FF 50%SL 31%FS 10%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: 50% usage, 5″ horizontal break, 14″ drop, 94.2 mphFF94 mphSlider: 31% usage, 0″ horizontal break, 34″ drop, 84.3 mphSL84 mphSplit-Finger: 10% usage, 9″ horizontal break, 34″ drop, 84.9 mphFS85 mphSinker: 9% usage, 11″ horizontal break, 17″ drop, 93.4 mphSI93 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 54.8% 320 108 qualified
SL 33.9% 198 97 limited sample
SI 11.3% 66 104 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-2.11
K% Δ+0.032

positive regression

Regression watch

Unlucky so far. Better days ahead.

1.7σ gap
wOBA-against (actual)0.318
xwOBA-against (deserved)0.267

Headrick’s wOBA-against sits at 0.318, but the quality of contact underneath says it should be 0.267 — a gap of 0.052, 1.7 standard deviations from the MLB norm over 71 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

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