Mithrandir Metrics
Player Atlanta Braves Refreshed Jun 14 06:00 AM ET
Player profile / Atlanta Braves

Martín Pérez

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

Cards
8
Modules
1
Live Δ
yes
Club Atlanta Braves Position P Roster Active Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024564.5326260135.01071.48
2025163.541110056.0441.11
2026532.901410062.0511.05
15 Seasons96964.3633928901693.212041.42
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.

2026-06-14
55
Pitching
percentile
Pitching9 metrics
44
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.

2026-06-14
ERA preseason4.43
ERA current pace3.02
ERA rolling p503.72
Observed weight50%
ERA
2.49 3.07 3.72 4.37 4.96
FIP
3.48 3.85 4.27 4.68 5.05
K%
15.5% 16.8% 18.3% 19.8% 21.1%
BB%
6.3% 7.1% 8.0% 9.0% 9.8%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-14
Pitching · percentile strip
WHIP1.11
76
ERA3.02
71
BB%8.6%
50
K%19.7%
30 +19 vs proj
xwOBA allowed0.317
48 +30 vs proj
Barrel allowed7.6%
49
Fastball velo89.9
4
Hard-hit allowed39.2%
49
Whiff%19.5%
20
Mithrandir+

Stuff+ and arsenal context

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

2026-06-14
Changeup Stuff+99
26
Mithrandir Stuff+97
19
Sinker Stuff+96
14
Curveball Stuff+103
70
Cutter Stuff+101
41
Fastball Stuff+89
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 0.317 2026-06-03: 0.3272026-06-04: 0.3272026-06-05: 0.3272026-06-06: 0.3172026-06-07: 0.3172026-06-08: 0.3172026-06-09: 0.3172026-06-10: 0.3172026-06-11: 0.3172026-06-12: 0.3172026-06-13: 0.3172026-06-14: 0.317 2026-06-03 2026-06-14 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 32%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: 50%50%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, Martín · 2026 arsenal snapshot Changeup: 32.5%Sinker: 29.6%Cutter: 21.7%Curveball: 9.5%4-Seam Fastball: 6.7% CH32% · 83 mphprimary pitch CH 32%SI 30%FC 22%CU 9%FF 7% 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″ Changeup: 32% usage, 7″ horizontal break, 31″ drop, 82.5 mphCH83 mphSinker: 30% usage, 1″ horizontal break, 25″ drop, 89.8 mphSI90 mphCutter: 22% usage, 1″ horizontal break, 27″ drop, 85.9 mphFC86 mphCurveball: 9% usage, 2″ horizontal break, 49″ drop, 77.3 mphCU77 mph4-Seam Fastball: 7% usage, 8″ horizontal break, 17″ drop, 90.2 mphFF90 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
CH 33.1% 266 99 qualified
SI 29.0% 233 96 qualified
FC 21.4% 172 101 limited sample
CB 10.0% 80 103 limited sample
FB 6.6% 53 89 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-1.38
K% Δ+0.031

positive regression

Regression watch

Unlucky so far. Better days ahead.

0.3σ gap
wOBA-against (actual)0.326
xwOBA-against (deserved)0.317

Pérez’s wOBA-against sits at 0.326, but the quality of contact underneath says it should be 0.317 — a gap of 0.009, 0.3 standard deviations from the MLB norm over 60 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
Pitching82026-05-24Changeup played up through CH/CU tunnel quality
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