Mithrandir Metrics
Player Arizona Diamondbacks Refreshed Sep 1 06:00 AM ET
Player profile / Arizona Diamondbacks

Justin Martinez

P · Bats/Throws R/R · 6' 3", 225 lb · Age 25

Cards
0
Modules
0
Live Δ
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Club Arizona Diamondbacks Position P Roster Current MLB team Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024562.48640872.2911.31
2025124.11170515.1221.24
2026100.004003.241.09
4 Seasons783.6395014101.21311.40
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
69
Pitching
percentile
Arsenal3 metrics
69
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 preseason3.74
ERA current pace0.00
ERA rolling p503.50
Observed weight6%
ERA
0.97 2.17 3.50 4.83 6.03
FIP
1.96 2.68 3.48 4.28 5.00
K%
24.3% 28.0% 32.2% 36.3% 40.0%
BB%
7.7% 10.1% 12.8% 15.4% 17.8%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-01
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+95
12
Mithrandir Stuff+107
93
Sinker Stuff+122
100
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 2025Season 33%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 Martinez, Justin · Aggregate zone metrics; not pitch-by-pitch locations Edge: 38%38%Zone: 54%54%Whiff: 13%13%Called strike: 17%17%First pitch strike: 69%69%Hard hit allowed: 12%12% Dashed border = aggregate mixed-batter zone proxy MITHRANDIR · CHARTS
Pitch arsenal

Usage mix, movement map, and Stuff+ composition

2025 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 →

2025
Mithrandir Metrics PITCH ARSENAL DONUT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Martinez, Justin · 2025 arsenal snapshot Split-Finger: 33.0%Sinker: 32.4%4-Seam Fastball: 25.4%Slider: 9.1% FS33% · 88 mphprimary pitch FS 33%SI 32%FF 25%SL 9% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Martinez, Justin · 2025 arsenal snapshot 9″18″27″36″ Split-Finger: 33% usage, 6″ horizontal break, 33″ drop, 88.4 mphFS88 mphSinker: 32% usage, 4″ horizontal break, 20″ drop, 99.5 mphSI99 mph4-Seam Fastball: 25% usage, 6″ horizontal break, 14″ drop, 100.2 mphFF100 mphSlider: 9% usage, 0″ horizontal break, 25″ drop, 91.5 mphSL91 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 50.0% 17 95 limited sample
SI 44.1% 15 122 limited sample
SL 5.9% 2 127 limited sample
Method note

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

Reference layer

Current snapshot

Age25
Height6' 3"
Weight225 lb
Debut2023-07-07
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 202632.0% K | 3.03 ERAProjection