Mithrandir Metrics
Pitcher projection 2026 Refreshed Sep 26 06:00 AM ET
Pitcher projection / LAD · 2026

Stewart, Brock

Run-prevention profile built on workable command

Primary
25.6% K%
Range
19.0% to 34.5%
Live Δ
yes
Team LAD Archetype Offspeed mix artist Age 35 Status Healthy / active roster
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
79
Pitching
percentile
Pitching9 metrics
81
Arsenal6 metrics
72
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 preseason3.13
ERA current pace2.66
ERA rolling p502.99
Observed weight29%
ERA
1.29 2.10 2.99 3.89 4.70
FIP
2.28 2.79 3.35 3.91 4.41
K%
18.6% 21.3% 24.3% 27.3% 30.0%
BB%
5.8% 7.3% 9.0% 10.7% 12.2%
Current percentile strip

Actual percentile with projection tick

100th = best in MLB.

2026-09-26
Pitching · percentile strip
WHIP0.99
94
ERA2.66
89
BB%9.1%
48
K%24.2%
67
xwOBA allowed0.247
97 +34 vs proj
Barrel allowed4.6%
89 +18 vs proj
Fastball velo95.5
67
Hard-hit allowed27.7%
98
Whiff%26.2%
76
Mithrandir+

Stuff+ and arsenal context

Stuff+ appears when the current pitch-event scoring artifact includes this pitcher; Arsenal Decomposition remains descriptive support under Stuff+.

2026-09-26
Changeup Stuff+109
93
Cutter Stuff+93
3
Fastball Stuff+107
86
Mithrandir Stuff+107
90
Sinker Stuff+105
75
Slider Stuff+106
84
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 37%Top usage
ride armside gloveside +Arsenal gap +Shape contrast
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 Stewart, Brock · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.247 2026-09-12: 0.2312026-09-13: 0.2312026-09-14: 0.2502026-09-18: 0.2492026-09-19: 0.2492026-09-20: 0.2492026-09-21: 0.2452026-09-22: 0.2452026-09-23: 0.2472026-09-24: 0.2472026-09-25: 0.2472026-09-26: 0.247 2026-09-12 2026-09-26 xwOBA allowed MITHRANDIR · CHARTS
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 Stewart, Brock · Aggregate zone metrics; not pitch-by-pitch locations Edge: 36%36%Zone: 47%47%Whiff: 26%26%Called strike: 15%15%First pitch strike: 48%48%Hard hit allowed: 28%28% 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.

2026
Mithrandir Metrics PITCH ARSENAL DONUT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Stewart, Brock · 2026 arsenal snapshot 4-Seam Fastball: 36.8%Sweeper: 25.0%Changeup: 15.1%Sinker: 14.6%Cutter: 8.5% FF37% · 96 mphprimary pitch FF 37%ST 25%CH 15%SI 15%FC 9% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Stewart, Brock · 2026 arsenal snapshot 12″24″36″48″ 4-Seam Fastball: 37% usage, 0″ horizontal break, 16″ drop, 95.9 mphFF96 mphSweeper: 25% usage, 12″ horizontal break, 36″ drop, 83.9 mphST84 mphChangeup: 15% usage, 15″ horizontal break, 35″ drop, 89.3 mphCH89 mphSinker: 15% usage, 15″ horizontal break, 27″ drop, 94.6 mphSI95 mphCutter: 9% usage, 2″ horizontal break, 25″ drop, 92.2 mphFC92 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 41.7% 75 107 limited sample
SL 25.6% 46 106 limited sample
SI 13.3% 24 105 limited sample
CH 12.2% 22 109 limited sample
FC 7.2% 13 93 limited sample
Method note

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

Model read

Projection notes

1
templated note
Needs the arsenal to hold up against lefties (0.257 vs 0.236 xwOBA allowed split).
pitcher
2
templated note
Volume stays relief-shaped even when the bat-miss traits are strong.
pitcher
3
templated note
Home park slightly inflates the home-run risk band.
pitcher
4
templated note
Primary mix entering the season: 4-Seam Fastball 54%, Sweeper 14%, Sinker 11%.
pitcher
Live context

Current-season signal

ERA Δ-0.88
K% Δ-0.014
Sample25.3 IP
Projection table

Point projection and range

MetricPointRangeHalf-width
Innings32.8----
Batters Faced140----
K%25.6%19.0% to 34.5%+/- 7.7%
BB%9.3%5.1% to 13.7%+/- 4.3%
Whiff%25.7%21.1% to 32.9%+/- 5.9%
HR/91.140.47 to 1.89+/- 0.71
xwOBA Against0.3030.217 to 0.334+/- 0.058
Barrel% Allowed6.2%1.8% to 9.4%+/- 3.8%
ERA3.541.34 to 5.79+/- 2.22
FIP3.232.37 to 5.16+/- 1.39
WHIP1.2100.968 to 1.636+/- 0.334
Platoon / Shape
vs LHH

389 career BF

xwOBA0.257
K%22.9%
BB%9.2%
Barrel3.9%
vs RHH

489 career BF

xwOBA0.236
K%26.2%
BB%7.3%
Barrel3.7%