Mithrandir Metrics
Player Seattle Mariners Refreshed Jun 1 06:00 AM ET
Player profile / Seattle Mariners

Bryan Woo

P profile with live context, projection links, and Mithrandir card history when available.

Cards
14
Modules
1
Live Δ
yes
Club Seattle Mariners Position P Roster Active Status Healthy / active roster
Rolling projection

Preseason / current pace / Bayesian update

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

2026-06-01
ERA preseason3.64
ERA current pace3.82
ERA rolling p503.74
Observed weight56%
ERA
2.79 3.24 3.74 4.24 4.69
FIP
2.77 3.05 3.36 3.67 3.96
K%
21.2% 22.7% 24.3% 25.9% 27.4%
BB%
3.9% 4.5% 5.2% 5.8% 6.4%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-01
Pitching · percentile strip
BB%4.7%
97
Barrel allowed7.1%
60 +22 vs proj
Fastball velo95.5
71
Hard-hit allowed43.1%
28
K%24.0%
60
Whiff%21.5%
37 -22 vs proj
xwOBA allowed0.272
82 +21 vs proj
Mithrandir+

Stuff+ and arsenal context

Stuff+ appears when the current pitch-event scoring artifact includes this pitcher; missing coverage is shown explicitly.

2026-06-01
Mithrandir Stuff+107
87
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 Woo, Bryan · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.314 2026-05-17: 0.2902026-05-19: 0.2902026-05-21: 0.2842026-05-23: 0.2842026-05-24: 0.2842026-05-25: 0.2822026-05-26: 0.2822026-05-28: 0.2822026-05-29: 0.2822026-05-30: 0.2822026-05-31: 0.2822026-06-01: 0.272 2026-05-17 2026-06-01 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 49%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 Woo, Bryan · Aggregate zone metrics; not pitch-by-pitch locations Edge: 36%36%Zone: 51%51%Whiff: 22%22%Called strike: 14%14%First pitch strike: 58%58%Hard hit allowed: 43%43% 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 Woo, Bryan · 2026 arsenal snapshot 4-Seam Fastball: 49.4%Sinker: 17.4%Sweeper: 14.9%Slider: 12.6%Changeup: 5.7% MIX FF 49%SI 17%ST 15%SL 13%CH 6% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Woo, Bryan · 2026 arsenal snapshot FF: HB -0.3, IVB 1.3FFSI: HB 0.7, IVB 2.1SIST: HB -0.3, IVB 2.9STSL: HB 0.2, IVB 3.0SLCH: HB -1.2, IVB 2.6CH horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 50.1% 476 107 qualified
SL 26.3% 250 104 qualified
SI 18.3% 174 104 limited sample
CH 5.3% 50 102 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' 2"
Weight205 lb
Debut2023-06-03
Live layer

Delta / regression

ERA Δ+0.52
K% Δ-0.004

negative regression

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching142026-05-244-Seam Fastball played up through FF/SL tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202624.4% K | 3.30 ERAProjection
2026-04-14 @ SD3 ER / 3 K7.0 IP
2026-04-08 @ TEX1 ER / 2 K5.0 IP
2026-04-03 @ LAA0 ER / 6 K7.0 IP