Mithrandir Metrics
Player Milwaukee Brewers Refreshed Sep 3 06:00 AM ET
Player profile / Milwaukee Brewers

Jacob Misiorowski

P · Bats/Throws R/R · 6' 7", 201 lb · Age 24

Cards
24
Modules
1
Live Δ
yes
Club Milwaukee Brewers Position P Roster Current MLB team Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2025534.361514066.0871.24
20261451.9726260155.02270.79
2 Seasons1982.6941400221.03140.93
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.

2026-09-03
95
Pitching
percentile
Pitching9 metrics
94
Arsenal6 metrics
68
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-03
ERA preseason4.03
ERA current pace1.97
ERA rolling p502.55
Observed weight72%
ERA
1.34 1.91 2.55 3.19 3.76
FIP
1.58 2.03 2.53 3.02 3.47
K%
32.6% 33.7% 35.0% 36.3% 37.5%
BB%
5.9% 6.5% 7.2% 7.8% 8.4%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-03
Pitching · percentile strip
WHIP0.81
99
ERA1.97
96
BB%6.7%
81 +28 vs proj
K%37.5%
99
xwOBA allowed0.224
99 +22 vs proj
Barrel allowed3.9%
93 +50 vs proj
Fastball velo100.5
100
Hard-hit allowed33.6%
83
Whiff%34.4%
99 +18 vs proj
Mithrandir+

Stuff+ and arsenal context

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

2026-09-03
Fastball Stuff+110
96
Mithrandir Stuff+109
98
Slider Stuff+110
97
Changeup Stuff+97
18
Curveball Stuff+100
20
Cutter Stuff+105
79
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 Misiorowski, Jacob · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.224 2026-08-23: 0.2162026-08-24: 0.2162026-08-25: 0.2192026-08-26: 0.2192026-08-27: 0.2192026-08-28: 0.2202026-08-29: 0.2202026-08-30: 0.2202026-08-31: 0.2202026-09-01: 0.2202026-09-02: 0.2202026-09-03: 0.224 2026-08-23 2026-09-03 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 63%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 Misiorowski, Jacob · Aggregate zone metrics; not pitch-by-pitch locations Edge: 37%37%Zone: 50%50%Whiff: 34%34%Called strike: 16%16%First pitch strike: 57%57%Hard hit allowed: 34%34% 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 Misiorowski, Jacob · 2026 arsenal snapshot 4-Seam Fastball: 62.8%Cutter: 13.9%Slider: 11.6%Curveball: 10.3%Changeup: 1.4% FF63% · 100 mphprimary pitch FF 63%FC 14%SL 12%CU 10%CH 1% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Misiorowski, Jacob · 2026 arsenal snapshot 12″24″36″48″ 4-Seam Fastball: 63% usage, 2″ horizontal break, 12″ drop, 100.5 mphFF100 mphCutter: 14% usage, 0″ horizontal break, 22″ drop, 95.8 mphFC96 mphSlider: 12% usage, 1″ horizontal break, 30″ drop, 91.9 mphSL92 mphCurveball: 10% usage, 2″ horizontal break, 43″ drop, 87.9 mphCU88 mphChangeup: 1% usage, 14″ horizontal break, 27″ drop, 92.5 mphCH92 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 61.6% 1015 110 qualified
SL 19.8% 327 110 qualified
CB 9.9% 164 100 limited sample
FC 7.7% 127 105 limited sample
CH 1.0% 16 97 limited sample
Method note

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

Reference layer

Current snapshot

Age24
Height6' 7"
Weight201 lb
Debut2025-06-12
Live layer

Delta / regression

ERA Δ-1.54
K% Δ+0.086

positive regression

Regression watch

Unlucky so far. Better days ahead.

0.5σ gap
wOBA-against (actual)0.237
xwOBA-against (deserved)0.224

Misiorowski’s wOBA-against sits at 0.237, but the quality of contact underneath says it should be 0.224 — a gap of 0.013, 0.5 standard deviations from the MLB norm over 159 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
Pitching242026-09-02Four-Seam Fastball played up through FF/SL tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202629.0% K | 3.51 ERAProjection
2026-08-15 @ LAD1 ER / 6 K6.0 IP
2026-04-14 vs TOR2 ER / 5 K5.1 IP
2026-04-07 @ BOS3 ER / 10 K5.1 IP
2026-04-01 vs TB2 ER / 7 K6.0 IP
2026-03-26 vs CWS1 ER / 11 K5.0 IP