Mithrandir Metrics
Player St. Louis Cardinals Refreshed Sep 26 06:00 AM ET
Player profile / St. Louis Cardinals

Luis Gastelum

P · Bats/Throws R/R · 6' 2", 175 lb · Age 24

Cards
0
Modules
0
Live Δ
yes
Club St. Louis Cardinals Position P Roster Current MLB team Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2026544.42340036.2441.25
1 Seasons544.42340036.2441.25
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
58
Pitching
percentile
Pitching9 metrics
60
Arsenal5 metrics
51
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 preseason3.76
ERA current pace4.64
ERA rolling p504.11
Observed weight40%
ERA
2.05 3.03 4.11 5.20 6.18
FIP
2.46 3.19 4.00 4.80 5.53
K%
16.5% 19.5% 22.8% 26.1% 29.1%
BB%
4.5% 6.2% 8.2% 10.1% 11.9%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-26
Pitching · percentile strip
WHIP1.23
68
ERA4.64
35
BB%8.2%
59 +15 vs proj
K%30.2%
94 +45 vs proj
xwOBA allowed0.327
33 -49 vs proj
Barrel allowed9.4%
21 -27 vs proj
Fastball velo93.9
41
Hard-hit allowed31.2%
93
Whiff%32.5%
98 +40 vs proj
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
Changeup Stuff+103
55
Fastball Stuff+103
54
Mithrandir Stuff+101
39
Sinker Stuff+106
77
Slider Stuff+99
27
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 Gastelum, Luis · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.327 2026-09-12: 0.3422026-09-13: 0.3392026-09-14: 0.3392026-09-18: 0.3432026-09-19: 0.3432026-09-20: 0.3432026-09-21: 0.3312026-09-22: 0.3312026-09-23: 0.3312026-09-24: 0.3272026-09-25: 0.3272026-09-26: 0.327 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 37%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 Gastelum, Luis · Aggregate zone metrics; not pitch-by-pitch locations Edge: 37%37%Zone: 45%45%Whiff: 32%32%Called strike: 17%17%First pitch strike: 55%55%Hard hit allowed: 31%31% 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 Gastelum, Luis · 2026 arsenal snapshot Changeup: 36.8%4-Seam Fastball: 31.3%Sweeper: 23.0%Sinker: 9.0% CH37% · 82 mphprimary pitch CH 37%FF 31%ST 23%SI 9% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Gastelum, Luis · 2026 arsenal snapshot 12″24″36″48″ Changeup: 37% usage, 4″ horizontal break, 45″ drop, 81.7 mphCH82 mph4-Seam Fastball: 31% usage, 1″ horizontal break, 16″ drop, 94.1 mphFF94 mphSweeper: 23% usage, 3″ horizontal break, 38″ drop, 84.5 mphST85 mphSinker: 9% usage, 13″ horizontal break, 25″ drop, 93.3 mphSI93 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
CH 35.3% 124 103 limited sample
FB 30.2% 106 103 limited sample
SL 25.9% 91 99 limited sample
SI 8.5% 30 106 limited sample
Method note

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

Reference layer

Current snapshot

Age24
Height6' 2"
Weight175 lb
Debut2026-07-08
Live layer

Delta / regression

ERA Δ+0.13
K% Δ+0.081

positive regression

Regression watch

Unlucky so far. Better days ahead.

0.2σ gap
wOBA-against (actual)0.335
xwOBA-against (deserved)0.327

Gastelum’s wOBA-against sits at 0.335, but the quality of contact underneath says it should be 0.327 — a gap of 0.007, 0.2 standard deviations from the MLB norm over 38 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 202622.1% K | 4.51 ERAProjection
2026-03-22 @ HOU0 ER / 3 K1.0 IP
2026-03-20 @ NYM0 ER / 1 K1.0 IP