Mithrandir Metrics
Player Atlanta Braves Refreshed Jul 18 06:00 AM ET
Player profile / Atlanta Braves

Martín Pérez

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

Cards
11
Modules
1
Live Δ
yes
Club Atlanta Braves Position P Roster Injured 15-Day Status IL-15
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024564.5326260135.01071.48
2025163.541110056.0441.11
2026663.541814081.1621.19
15 Seasons97994.3734329301713.012151.42
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.

2026-07-18
44
Pitching
percentile
Pitching9 metrics
42
Arsenal6 metrics
29
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 preseason4.43
ERA current pace3.54
ERA rolling p503.90
Observed weight59%
ERA
2.65 3.24 3.90 4.56 5.16
FIP
3.69 4.07 4.49 4.91 5.28
K%
15.1% 16.2% 17.5% 18.8% 19.9%
BB%
7.0% 7.8% 8.6% 9.4% 10.2%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-07-18
Pitching · percentile strip
WHIP1.23
66
ERA3.54
61
BB%9.4%
41 -17 vs proj
K%17.9%
18
xwOBA allowed0.330
32 +17 vs proj
Barrel allowed6.7%
65 +31 vs proj
Fastball velo89.3
3
Hard-hit allowed36.1%
67
Whiff%19.9%
24
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
Changeup Stuff+99
26
Cutter Stuff+100
34
Mithrandir Stuff+98
20
Sinker Stuff+97
17
Curveball Stuff+103
74
Fastball Stuff+90
3
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 0.314 0.330 2026-07-07: 0.3302026-07-08: 0.3302026-07-09: 0.3302026-07-10: 0.3302026-07-11: 0.3302026-07-12: 0.3302026-07-13: 0.3302026-07-14: 0.3302026-07-15: 0.3302026-07-16: 0.3302026-07-17: 0.3302026-07-18: 0.330 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.

5Pitches 2026Season 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 Pérez, Martín · Aggregate zone metrics; not pitch-by-pitch locations Edge: 40%40%Zone: 46%46%Whiff: 20%20%Called strike: 18%18%First pitch strike: 48%48%Hard hit allowed: 36%36% 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: 32.8%Changeup: 30.3%Cutter: 23.2%Curveball: 8.2%4-Seam Fastball: 5.5% SI33% · 89 mphprimary pitch SI 33%CH 30%FC 23%CU 8%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: 33% usage, 1″ horizontal break, 26″ drop, 89.2 mphSI89 mphChangeup: 30% usage, 7″ horizontal break, 32″ drop, 82.1 mphCH82 mphCutter: 23% usage, 0″ horizontal break, 28″ drop, 85.3 mphFC85 mphCurveball: 8% usage, 2″ horizontal break, 49″ drop, 77.1 mphCU77 mph4-Seam Fastball: 5% usage, 8″ horizontal break, 18″ drop, 90.0 mphFF90 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
CH 31.6% 307 99 qualified
SI 30.5% 296 97 qualified
FC 23.3% 226 100 qualified
CB 9.2% 89 103 limited sample
FB 5.5% 53 90 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-0.86
K% Δ+0.013

positive regression

Regression watch

Unlucky so far. Better days ahead.

0.1σ gap
wOBA-against (actual)0.333
xwOBA-against (deserved)0.330

Pérez’s wOBA-against sits at 0.333, but the quality of contact underneath says it should be 0.330 — a gap of 0.003, 0.1 standard deviations from the MLB norm over 85 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
Pitching112026-07-05Stuff and strike quality carried the outing
Projection links / recent games

Available detail

Pitcher Projections 202616.6% K | 4.40 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