Mithrandir Metrics
Player Tampa Bay Rays Refreshed Jun 1 06:00 AM ET
Player profile / Tampa Bay Rays

Steven Matz

P profile with live context, projection links, and Mithrandir card history when available.

Cards
12
Modules
1
Live Δ
yes
Club Tampa Bay Rays Position P Roster Active Status Healthy / active roster
Rolling projection

Preseason / current pace / Bayesian update

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

2026-06-01
ERA preseason4.09
ERA current pace4.67
ERA rolling p504.35
Observed weight46%
ERA
3.23 3.76 4.35 4.95 5.48
FIP
3.82 4.12 4.46 4.80 5.10
K%
15.7% 17.1% 18.6% 20.2% 21.6%
BB%
5.6% 6.4% 7.3% 8.2% 9.0%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-01
Pitching · percentile strip
BB%8.9%
47 -39 vs proj
Barrel allowed10.4%
21 -29 vs proj
Fastball velo93.3
31
Hard-hit allowed37.5%
61
K%19.3%
27
Whiff%20.9%
32 +23 vs proj
xwOBA allowed0.350
18 -18 vs proj
Mithrandir+

Stuff+ and arsenal context

Stuff+ appears when the current pitch-event scoring artifact includes this pitcher; missing coverage is shown explicitly.

2026-06-01
Mithrandir Stuff+103
61
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 Matz, Steven · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.314 2026-05-17: 0.3422026-05-19: 0.3422026-05-21: 0.3422026-05-23: 0.3332026-05-24: 0.3332026-05-25: 0.3322026-05-26: 0.3322026-05-28: 0.3502026-05-29: 0.3502026-05-30: 0.3502026-05-31: 0.3502026-06-01: 0.350 2026-05-17 2026-06-01 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 48%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 Matz, Steven · Aggregate zone metrics; not pitch-by-pitch locations Edge: 38%38%Zone: 51%51%Whiff: 21%21%Called strike: 16%16%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.

2026
Mithrandir Metrics PITCH ARSENAL DONUT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Matz, Steven · 2026 arsenal snapshot Sinker: 48.3%Changeup: 30.0%Slider: 12.1%Curveball: 9.6% MIX SI 48%CH 30%SL 12%CU 10% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Matz, Steven · 2026 arsenal snapshot SI: HB -0.5, IVB 1.6SICH: HB -0.8, IVB 3.3CHSL: HB 0.1, IVB 3.5SLCU: HB 0.7, IVB 4.6CU horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
SI 48.4% 353 102 qualified
CH 30.1% 220 104 qualified
SL 11.6% 85 102 limited sample
CB 9.9% 72 104 limited sample
Method note

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

Reference layer

Current snapshot

Age35
Height6' 2"
Weight205 lb
Debut2015-06-28
Live layer

Delta / regression

ERA Δ+0.06
K% Δ+0.021

negative regression

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching122026-05-27Sinker played up through CH/CU tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202617.3% K | 4.61 ERAProjection
2026-05-20 vs BAL1 ER / 5 K4.0 IP
2026-04-04 @ MIN1 ER / 8 K6.0 IP
2026-03-29 @ STL4 ER / 2 K5.0 IP