Mithrandir Metrics
Player STL Refreshed Sep 26 06:00 AM ET
Player profile / STL

Brycen Mautz

Player · Bats/Throws L/L · 6' 3", 190 lb · Age 25

Cards
1
Modules
1
Live Δ
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Club STL Position -- Roster profile Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2026015.8781015.1191.89
1 Seasons015.8781015.1191.89
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
28
Pitching
percentile
Arsenal5 metrics
28
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 preseason2.83
ERA current pace7.94
ERA rolling p504.05
Observed weight24%
ERA
2.12 3.03 4.05 5.06 5.97
FIP
1.20 2.31 3.55 4.78 5.89
K%
12.2% 16.4% 21.1% 25.8% 30.0%
BB%
4.5% 6.1% 7.9% 9.8% 11.4%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-26
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
Curveball Stuff+97
3
Fastball Stuff+99
28
Mithrandir Stuff+92
9
Sinker Stuff+112
98
Slider Stuff+71
0
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.

5Pitches 2026Season 38%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 Mautz, Brycen · Aggregate zone metrics; not pitch-by-pitch locations Edge: 42%42%Zone: 43%43%Whiff: 31%31%Called strike: 15%15%First pitch strike: 47%47%Hard hit allowed: 30%30% 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 Mautz, Brycen · 2026 arsenal snapshot 4-Seam Fastball: 38.4%Slider: 26.5%Curveball: 19.5%Sinker: 14.6%Changeup: 1.0% FF38% · 94 mphprimary pitch FF 38%SL 26%CU 20%SI 15%CH 1% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Mautz, Brycen · 2026 arsenal snapshot 15″30″45″60″ 4-Seam Fastball: 38% usage, 4″ horizontal break, 18″ drop, 93.5 mphFF94 mphSlider: 26% usage, 1″ horizontal break, 41″ drop, 83.6 mphSL84 mphCurveball: 20% usage, 4″ horizontal break, 55″ drop, 78.4 mphCU78 mphSinker: 15% usage, 17″ horizontal break, 27″ drop, 93.2 mphSI93 mphChangeup: 1% usage, 14″ horizontal break, 31″ drop, 87.6 mphCH88 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 39.4% 85 99 limited sample
SL 25.0% 54 71 limited sample
CB 18.5% 40 97 limited sample
SI 16.2% 35 112 limited sample
CH 0.9% 2 48 limited sample
Method note

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

Reference layer

Current snapshot

MLB bio context is unavailable.
Live layer

Delta / regression

No Live State delta is available for this profile yet.

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching12026-09-02Four-Seam Fastball played up through FF/SL tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202619.1% K | 4.04 ERAProjection