Mithrandir Metrics
Pitcher projection 2026 Refreshed Sep 5 06:00 AM ET
Pitcher projection / PIT · 2026

Weaver, Luke

Run-prevention profile built on workable command

Primary
24.8% K%
Range
19.3% to 34.9%
Live Δ
yes
Team PIT Archetype Offspeed mix artist Age 33 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.

2026-09-05
83
Pitching
percentile
Pitching9 metrics
76
Arsenal4 metrics
67
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-05
ERA preseason3.79
ERA current pace2.58
ERA rolling p503.21
Observed weight48%
ERA
1.79 2.46 3.21 3.95 4.63
FIP
2.40 2.84 3.33 3.82 4.26
K%
22.3% 24.4% 26.8% 29.1% 31.3%
BB%
5.5% 6.5% 7.6% 8.7% 9.7%
Current percentile strip

Actual percentile with projection tick

100th = best in MLB.

2026-09-05
Pitching · percentile strip
WHIP0.98
94
ERA2.58
89
BB%8.1%
60
K%26.7%
81
xwOBA allowed0.269
90 +28 vs proj
Barrel allowed7.0%
56 +18 vs proj
Fastball velo95.3
64
Hard-hit allowed35.9%
68
Whiff%27.6%
84
Mithrandir+

Stuff+ and arsenal context

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

2026-09-05
Changeup Stuff+106
81
Fastball Stuff+110
95
Mithrandir Stuff+106
87
Cutter Stuff+95
5
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.

4Pitches 2026Season 50%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 Weaver, Luke · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.269 2026-08-25: 0.2672026-08-26: 0.2672026-08-27: 0.2672026-08-28: 0.2672026-08-29: 0.2672026-08-30: 0.2642026-08-31: 0.2642026-09-01: 0.2642026-09-02: 0.2712026-09-03: 0.2712026-09-04: 0.2692026-09-05: 0.269 2026-08-25 2026-09-05 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 Weaver, Luke · Aggregate zone metrics; not pitch-by-pitch locations Edge: 40%40%Zone: 48%48%Whiff: 28%28%Called strike: 14%14%First pitch strike: 50%50%Hard hit allowed: 36%36% 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 Weaver, Luke · 2026 arsenal snapshot 4-Seam Fastball: 50.2%Changeup: 34.0%Cutter: 15.6%Slider: 0.1% FF50% · 95 mphprimary pitch FF 50%CH 34%FC 16%SL 0% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Weaver, Luke · 2026 arsenal snapshot 12″24″36″48″ 4-Seam Fastball: 50% usage, 0″ horizontal break, 12″ drop, 95.3 mphFF95 mphChangeup: 34% usage, 4″ horizontal break, 30″ drop, 88.0 mphCH88 mphCutter: 16% usage, 2″ horizontal break, 24″ drop, 90.5 mphFC90 mphSlider: 0% usage, 5″ horizontal break, 42″ drop, 84.8 mphSL85 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 51.2% 309 110 qualified
CH 34.7% 209 106 qualified
FC 14.1% 85 95 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
Volume stays relief-shaped even when the bat-miss traits are strong.
2
templated note
Home park gives the run-prevention profile a small HR cushion.
3
templated note
Primary mix entering the season: 4-Seam Fastball 59%, Changeup 30%, Cutter 9%.
Live context

Current-season signal

ERA Δ-1.38
K% Δ+0.019
Sample55.3 IP

negative regression

Projection table

Point projection and range

MetricPointRangeHalf-width
Innings44.8----
Batters Faced187----
K%24.8%19.3% to 34.9%+/- 7.8%
BB%8.0%5.0% to 11.9%+/- 3.4%
Whiff%26.1%21.3% to 31.7%+/- 5.2%
HR/91.300.62 to 2.29+/- 0.84
xwOBA Against0.3040.262 to 0.362+/- 0.050
Barrel% Allowed8.1%5.0% to 12.7%+/- 3.8%
ERA3.952.39 to 6.72+/- 2.17
FIP4.032.76 to 5.45+/- 1.34
WHIP1.2290.981 to 1.611+/- 0.315
Platoon / Shape
vs LHH

1618 career BF

xwOBA0.286
K%24.6%
BB%8.0%
Barrel8.0%
vs RHH

1699 career BF

xwOBA0.290
K%24.7%
BB%6.8%
Barrel9.3%