Mithrandir Metrics
Player Miami Marlins Refreshed Jul 18 06:00 AM ET
Player profile / Miami Marlins

Eury Pérez

P · Bats/Throws R/R · 6' 8", 220 lb · Age 23

Cards
20
Modules
1
Live Δ
yes
Club Miami Marlins Position P Roster Active Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2023563.151919091.11081.13
2025764.252020095.11051.05
2026573.781616085.2951.14
3 Seasons17193.7355550272.13081.11
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.

2026-07-18
61
Pitching
percentile
Pitching9 metrics
60
Arsenal6 metrics
49
Rolling projection

Preseason / current pace / Bayesian update

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

2026-07-18
ERA preseason4.10
ERA current pace3.78
ERA rolling p503.90
Observed weight62%
ERA
2.59 3.22 3.90 4.59 5.21
FIP
3.06 3.47 3.92 4.37 4.78
K%
24.1% 25.4% 26.9% 28.4% 29.8%
BB%
7.3% 7.9% 8.7% 9.5% 10.1%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-07-18
Pitching · percentile strip
WHIP1.11
81
ERA3.78
56
BB%9.4%
41 -30 vs proj
K%27.3%
80 +22 vs proj
xwOBA allowed0.316
48
Barrel allowed11.5%
8 -35 vs proj
Fastball velo98.0
94
Hard-hit allowed38.7%
51
Whiff%27.0%
79
Mithrandir+

Stuff+ and arsenal context

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

2026-07-18
Fastball Stuff+109
90
Mithrandir Stuff+105
73
Slider Stuff+102
51
Changeup Stuff+99
29
Curveball Stuff+102
52
Sinker Stuff+88
2
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 Pérez, Eury · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.314 0.316 2026-07-07: 0.3162026-07-08: 0.3162026-07-09: 0.3162026-07-10: 0.3162026-07-11: 0.3162026-07-12: 0.3162026-07-13: 0.3162026-07-14: 0.3162026-07-15: 0.3162026-07-16: 0.3162026-07-17: 0.3162026-07-18: 0.316 2026-07-07 2026-07-18 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.

6Pitches 2026Season 44%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 Pérez, Eury · Aggregate zone metrics; not pitch-by-pitch locations Edge: 35%35%Zone: 46%46%Whiff: 27%27%Called strike: 12%12%First pitch strike: 51%51%Hard hit allowed: 39%39% 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 Pérez, Eury · 2026 arsenal snapshot 4-Seam Fastball: 44.4%Slider: 15.1%Sweeper: 14.5%Changeup: 10.3%Sinker: 9.5%Curveball: 6.2% FF44% · 98 mphprimary pitch FF 44%SL 15%ST 14%CH 10%SI 9%CU 6% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Pérez, Eury · 2026 arsenal snapshot 15″30″45″60″ 4-Seam Fastball: 44% usage, 2″ horizontal break, 11″ drop, 98.1 mphFF98 mphSlider: 15% usage, 0″ horizontal break, 31″ drop, 87.7 mphSL88 mphSweeper: 14% usage, 2″ horizontal break, 29″ drop, 83.4 mphST83 mphChangeup: 10% usage, 8″ horizontal break, 24″ drop, 89.7 mphCH90 mphSinker: 9% usage, 1″ horizontal break, 15″ drop, 97.5 mphSI97 mphCurveball: 6% usage, 6″ horizontal break, 50″ drop, 80.8 mphCU81 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 47.2% 575 109 qualified
SL 30.2% 368 102 qualified
CH 9.9% 120 99 limited sample
SI 6.9% 84 88 limited sample
CB 5.8% 70 102 limited sample
Method note

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

Reference layer

Current snapshot

Age23
Height6' 8"
Weight220 lb
Debut2023-05-12
Live layer

Delta / regression

ERA Δ-0.31
K% Δ+0.037

positive regression

Regression watch

Unlucky so far. Better days ahead.

0.4σ gap
wOBA-against (actual)0.327
xwOBA-against (deserved)0.316

Pérez’s wOBA-against sits at 0.327, but the quality of contact underneath says it should be 0.316 — a gap of 0.011, 0.4 standard deviations from the MLB norm over 94 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
Pitching202026-07-11Sinker played up through SI/SL tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202623.7% K | 4.09 ERAProjection
2026-04-13 @ ATL3 ER / 2 K4.0 IP
2026-04-08 vs CIN2 ER / 6 K5.0 IP
2026-04-03 @ NYY4 ER / 4 K4.0 IP