Mithrandir Metrics
Player Atlanta Braves Refreshed Sep 27 06:00 AM ET
Player profile / Atlanta Braves

Martín Pérez

P · Bats/Throws L/L · 6' 0", 210 lb · Age 35

Cards
22
Modules
1
Live Δ
yes
Club Atlanta Braves Position P Roster Current MLB team Status IL-15
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024564.5326260135.01071.48
2025163.541110056.0441.11
2026993.0430260142.01021.27
15 Seasons1001024.3035530501773.212551.42
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.

2026-09-27
44
Pitching
percentile
Pitching9 metrics
45
Arsenal6 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.

2026-09-27
ERA preseason4.43
ERA current pace3.04
ERA rolling p503.43
Observed weight72%
ERA
2.08 2.72 3.43 4.14 4.78
FIP
3.55 3.96 4.41 4.86 5.26
K%
14.9% 15.8% 16.8% 17.8% 18.7%
BB%
8.1% 8.8% 9.5% 10.2% 10.8%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-27
Pitching · percentile strip
WHIP1.29
57
ERA3.04
82
BB%10.2%
33 -25 vs proj
K%16.7%
14
xwOBA allowed0.326
33 +18 vs proj
Barrel allowed4.7%
89 +59 vs proj
Fastball velo89.3
3
Hard-hit allowed34.9%
77
Whiff%19.2%
21
Mithrandir+

Stuff+ and arsenal context

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

2026-09-27
Changeup Stuff+98
24
Cutter Stuff+99
29
Mithrandir Stuff+98
20
Sinker Stuff+97
17
Curveball Stuff+104
76
Fastball Stuff+91
5
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, Martín · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.326 2026-09-13: 0.3282026-09-14: 0.3282026-09-18: 0.3282026-09-19: 0.3282026-09-20: 0.3282026-09-21: 0.3262026-09-22: 0.3262026-09-23: 0.3262026-09-24: 0.3262026-09-25: 0.3262026-09-26: 0.3262026-09-27: 0.326 2026-09-13 2026-09-27 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.

5Pitches 2026Season 35%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, Martín · Aggregate zone metrics; not pitch-by-pitch locations Edge: 40%40%Zone: 45%45%Whiff: 19%19%Called strike: 18%18%First pitch strike: 47%47%Hard hit allowed: 35%35% 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, Martín · 2026 arsenal snapshot Sinker: 35.3%Changeup: 30.9%Cutter: 22.1%Curveball: 7.2%4-Seam Fastball: 4.5% SI35% · 89 mphprimary pitch SI 35%CH 31%FC 22%CU 7%FF 5% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Pérez, Martín · 2026 arsenal snapshot 15″30″45″60″ Sinker: 35% usage, 1″ horizontal break, 25″ drop, 89.2 mphSI89 mphChangeup: 31% usage, 7″ horizontal break, 33″ drop, 81.7 mphCH82 mphCutter: 22% usage, 0″ horizontal break, 29″ drop, 85.0 mphFC85 mphCurveball: 7% usage, 3″ horizontal break, 50″ drop, 76.8 mphCU77 mph4-Seam Fastball: 5% usage, 7″ horizontal break, 18″ drop, 89.9 mphFF90 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
SI 33.4% 552 97 qualified
CH 32.0% 530 98 qualified
FC 21.8% 360 99 qualified
CB 8.2% 135 104 limited sample
FB 4.7% 78 91 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' 0"
Weight210 lb
Debut2012-06-27
Live layer

Delta / regression

ERA Δ-1.37
K% Δ+0.001

negative regression

Regression watch

Running hot. Expect some cooling.

-0.1σ gap
wOBA-against (actual)0.323
xwOBA-against (deserved)0.326

Pérez’s wOBA-against sits at 0.323, but the quality of contact underneath says it should be 0.326 — a gap of 0.002, -0.1 standard deviations from the MLB norm over 145 IP. The results have outrun the underlying process; as the sample grows, expect the numbers to drift back toward the deserved level.

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching222026-09-20Changeup played up through CH/SI tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202616.6% K | 4.41 ERAProjection
2026-04-17 @ PHI0 ER / 4 K6.0 IP
2026-04-11 vs CLE1 ER / 2 K5.0 IP
2026-04-05 @ AZ4 ER / 1 K5.0 IP
2026-03-31 vs ATH0 ER / 3 K4.1 IP