Mithrandir Metrics
Player Atlanta Braves Refreshed Sep 26 06:00 AM ET
Player profile / Atlanta Braves

Ray Kerr

P · Bats/Throws L/L · 6' 3", 185 lb · Age 32

Cards
1
Modules
1
Live Δ
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Club Atlanta Braves Position P Roster Current MLB team Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2023114.33220027.0351.26
2024125.64102022.1271.61
2026001.4791018.1110.60
4 Seasons234.33483072.2761.21
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
51
Pitching
percentile
Arsenal4 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 preseason3.84
ERA current pace1.26
ERA rolling p503.28
Observed weight22%
ERA
1.87 2.54 3.28 4.02 4.69
FIP
2.99 3.22 3.47 3.73 3.96
K%
17.7% 19.7% 22.0% 24.3% 26.3%
BB%
3.3% 4.4% 5.7% 7.0% 8.2%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-26
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
Curveball Stuff+101
28
Fastball Stuff+101
44
Mithrandir Stuff+102
46
Sinker Stuff+107
85
Rolling form chart

xwOBA allowed snapshot line

Live snapshot series; true 50/100 PA windows require PA-level logs

0 snapshots
No chart yet

No Live State xwOBA snapshots are available for this player.

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 36%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 Kerr, Ray · Aggregate zone metrics; not pitch-by-pitch locations Edge: 33%33%Zone: 53%53%Whiff: 20%20%Called strike: 17%17%First pitch strike: 54%54%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 Kerr, Ray · 2026 arsenal snapshot 4-Seam Fastball: 35.8%Curveball: 31.1%Sinker: 22.6%Slow Curve: 6.6%Cutter: 3.8% FF36% · 95 mphprimary pitch FF 36%CU 31%SI 23%CS 7%FC 4% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Kerr, Ray · 2026 arsenal snapshot 15″30″45″60″ 4-Seam Fastball: 36% usage, 5″ horizontal break, 16″ drop, 94.9 mphFF95 mphCurveball: 31% usage, 1″ horizontal break, 45″ drop, 81.1 mphCU81 mphSinker: 23% usage, 10″ horizontal break, 20″ drop, 94.6 mphSI95 mphSlow Curve: 7% usage, 2″ horizontal break, 51″ drop, 80.3 mphCS80 mphCutter: 4% usage, 0″ horizontal break, 24″ drop, 90.2 mphFC90 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
CB 38.5% 75 101 limited sample
FB 35.4% 69 101 limited sample
SI 22.1% 43 107 limited sample
FC 4.1% 8 99 limited sample
Method note

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

Reference layer

Current snapshot

Age32
Height6' 3"
Weight185 lb
Debut2022-04-24
Live layer

Delta / regression

No Live State delta is available for this profile yet.

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching12026-09-25Command and chase profile drove the outing
Projection links / recent games

Available detail

Pitcher Projections 202624.3% K | 3.93 ERAProjection