Mithrandir Metrics
Player Chicago White Sox Refreshed Sep 28 06:00 AM ET
Player profile / Chicago White Sox

Sean Burke

P · Bats/Throws R/R · 6' 6", 240 lb · Age 26

Cards
26
Modules
1
Live Δ
yes
Club Chicago White Sox Position P Roster Current MLB team Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024201.4243019.0221.00
20254114.2228220134.11331.44
20261173.3432270172.11851.20
3 Seasons17183.5964520325.23401.29
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.

2026-09-28
68
Pitching
percentile
Pitching9 metrics
58
Arsenal7 metrics
78
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-28
ERA preseason3.72
ERA current pace3.34
ERA rolling p503.43
Observed weight76%
ERA
2.16 2.76 3.43 4.10 4.70
FIP
2.89 3.28 3.72 4.15 4.54
K%
23.1% 24.1% 25.2% 26.3% 27.3%
BB%
7.5% 8.1% 8.7% 9.3% 9.9%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-28
Pitching · percentile strip
WHIP1.21
70
ERA3.34
75
BB%8.7%
52
K%25.6%
74 +15 vs proj
xwOBA allowed0.300
68 +20 vs proj
Barrel allowed8.7%
30
Fastball velo94.7
53
Hard-hit allowed39.1%
46
Whiff%22.6%
50
Mithrandir+

Stuff+ and arsenal context

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

2026-09-28
Curveball Stuff+103
60
Fastball Stuff+110
94
Mithrandir Stuff+107
92
Sinker Stuff+103
56
Slider Stuff+105
77
Changeup Stuff+107
85
Cutter Stuff+105
83
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 Burke, Sean · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.300 2026-09-14: 0.3022026-09-18: 0.3022026-09-19: 0.3022026-09-20: 0.3022026-09-21: 0.3032026-09-22: 0.3032026-09-23: 0.3032026-09-24: 0.3032026-09-25: 0.3032026-09-26: 0.3002026-09-27: 0.3002026-09-28: 0.300 2026-09-14 2026-09-28 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.

7Pitches 2026Season 37%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 Burke, Sean · Aggregate zone metrics; not pitch-by-pitch locations Edge: 38%38%Zone: 49%49%Whiff: 23%23%Called strike: 17%17%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 Burke, Sean · 2026 arsenal snapshot 4-Seam Fastball: 37.5%Knuckle Curve: 19.9%Slider: 16.7%Sinker: 13.4%Cutter: 10.3%Changeup: 2.1% FF37% · 95 mphprimary pitch FF 37%KC 20%SL 17%SI 13%FC 10%CH 2% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Burke, Sean · 2026 arsenal snapshot 18″36″54″72″ 4-Seam Fastball: 37% usage, 2″ horizontal break, 12″ drop, 94.7 mphFF95 mphKnuckle Curve: 20% usage, 3″ horizontal break, 58″ drop, 79.0 mphKC79 mphSlider: 17% usage, 2″ horizontal break, 33″ drop, 86.5 mphSL87 mphSinker: 13% usage, 0″ horizontal break, 16″ drop, 94.7 mphSI95 mphCutter: 10% usage, 2″ horizontal break, 24″ drop, 89.8 mphFC90 mphChangeup: 2% usage, 13″ horizontal break, 27″ drop, 85.8 mphCH86 mphSlow Curve: 0% usage, 4″ horizontal break, 62″ drop, 68.1 mphCS68 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 37.4% 689 110 qualified
CB 20.1% 370 103 qualified
SL 16.1% 296 105 qualified
SI 14.3% 263 103 qualified
FC 9.6% 177 105 limited sample
CH 2.6% 47 107 limited sample
Method note

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

Reference layer

Current snapshot

Age26
Height6' 6"
Weight240 lb
Debut2024-09-10
Live layer

Delta / regression

ERA Δ-1.27
K% Δ+0.023

positive regression

Regression watch

Unlucky so far. Better days ahead.

1.0σ gap
wOBA-against (actual)0.324
xwOBA-against (deserved)0.300

Burke’s wOBA-against sits at 0.324, but the quality of contact underneath says it should be 0.300 — a gap of 0.024, 1.0 standard deviations from the MLB norm over 179 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
Pitching262026-09-25Four-Seam Fastball played up through FF/SL tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202623.3% K | 4.61 ERAProjection
2026-05-20 @ SEA2 ER / 5 K4.2 IP
2026-04-15 vs TB4 ER / 2 K5.1 IP
2026-04-08 vs BAL2 ER / 3 K5.0 IP
2026-04-03 vs TOR1 ER / 7 K6.0 IP