Mithrandir Metrics
Player Washington Nationals Refreshed Jun 1 06:00 AM ET
Player profile / Washington Nationals

Foster Griffin

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

Cards
12
Modules
1
Live Δ
yes
Club Washington Nationals 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.

Pending

Rolling player projection appears after current-season Statcast and projection joins refresh.

Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-01
Pitching · percentile strip
BB%7.6%
66
Barrel allowed11.9%
10
Fastball velo91.3
9
Hard-hit allowed36.6%
66
K%23.2%
54
Whiff%22.1%
44
xwOBA allowed0.330
36
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+102
50
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 Griffin, Foster · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.314 2026-05-17: 0.3352026-05-19: 0.3352026-05-21: 0.3292026-05-23: 0.3292026-05-24: 0.3292026-05-25: 0.3222026-05-26: 0.3222026-05-28: 0.3222026-05-29: 0.3222026-05-30: 0.3222026-05-31: 0.3222026-06-01: 0.330 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.

7Pitches 2026Season 30%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 Griffin, Foster · Aggregate zone metrics; not pitch-by-pitch locations Edge: 38%38%Zone: 49%49%Whiff: 22%22%Called strike: 19%19%First pitch strike: 49%49%Hard hit allowed: 37%37% 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 Griffin, Foster · 2026 arsenal snapshot Cutter: 29.9%4-Seam Fastball: 18.5%Sweeper: 15.3%Changeup: 10.8%Sinker: 10.7%Curveball: 8.8% MIX FC 30%FF 19%ST 15%CH 11%SI 11%CU 9% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Griffin, Foster · 2026 arsenal snapshot FC: HB 0.2, IVB 2.3FCFF: HB -0.1, IVB 1.4FFST: HB -0.2, IVB 3.7STCH: HB -1.2, IVB 2.7CHSI: HB -0.1, IVB 1.9SICU: HB 0.3, IVB 4.9CUFS: HB -0.0, IVB 3.4FS horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FC 32.9% 315 106 qualified
FB 18.4% 176 99 limited sample
SL 15.6% 149 102 limited sample
CH 12.0% 115 98 limited sample
SI 11.6% 111 98 limited sample
CB 9.6% 92 103 limited sample
Method note

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

Reference layer

Current snapshot

Age30
Height6' 3"
Weight225 lb
Debut2020-07-27
Live layer

Delta / regression

ERA Δ--
K% Δ--

positive regression

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching122026-05-24Cutter played up through FC/ST tunnel quality
Projection links / recent games

Available detail

2026-04-11 @ MIL0 ER / 1 K5.1 IP
2026-04-05 vs LAD1 ER / 6 K5.0 IP
2026-03-30 @ PHI2 ER / 5 K5.0 IP