Mithrandir Metrics
Player Arizona Diamondbacks Refreshed Jun 1 06:00 AM ET
Player profile / Arizona Diamondbacks

Zac Gallen

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

Cards
17
Modules
1
Live Δ
yes
Club Arizona Diamondbacks 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 preseason4.35
ERA current pace4.80
ERA rolling p504.59
Observed weight54%
ERA
3.68 4.12 4.59 5.07 5.51
FIP
4.33 4.59 4.89 5.19 5.45
K%
15.6% 16.9% 18.3% 19.7% 20.9%
BB%
5.9% 6.5% 7.3% 8.0% 8.7%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-01
Pitching · percentile strip
BB%7.1%
73
Barrel allowed11.5%
12 -26 vs proj
Fastball velo93.4
33
Hard-hit allowed46.3%
11
K%14.9%
7 -33 vs proj
Whiff%17.7%
11 -21 vs proj
xwOBA allowed0.355
13 -26 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+102
57
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 Gallen, Zac · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.314 2026-05-17: 0.3612026-05-19: 0.3612026-05-21: 0.3552026-05-23: 0.3552026-05-24: 0.3462026-05-25: 0.3462026-05-26: 0.3462026-05-28: 0.3462026-05-29: 0.3462026-05-30: 0.3462026-05-31: 0.3552026-06-01: 0.355 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 39%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 Gallen, Zac · Aggregate zone metrics; not pitch-by-pitch locations Edge: 38%38%Zone: 43%43%Whiff: 18%18%Called strike: 16%16%First pitch strike: 49%49%Hard hit allowed: 46%46% 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 Gallen, Zac · 2026 arsenal snapshot 4-Seam Fastball: 38.9%Slider: 22.3%Knuckle Curve: 19.5%Changeup: 14.0%Sinker: 5.4% MIX FF 39%SL 22%KC 19%CH 14%SI 5% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Gallen, Zac · 2026 arsenal snapshot FF: HB -0.1, IVB 1.2FFSL: HB -0.2, IVB 2.6SLKC: HB 0.1, IVB 4.2KCCH: HB -0.8, IVB 2.7CHSI: HB 0.9, IVB 1.5SI horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 37.4% 349 104 qualified
SL 24.5% 229 104 qualified
CB 20.0% 187 102 limited sample
CH 12.6% 118 105 limited sample
SI 5.4% 50 95 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' 2"
Weight189 lb
Debut2019-06-20
Live layer

Delta / regression

ERA Δ+0.59
K% Δ-0.062

positive regression

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching172026-05-234-Seam Fastball played up through FF/KC tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202621.1% K | 4.21 ERAProjection
2026-04-12 @ PHI3 ER / 2 K5.0 IP
2026-04-07 @ NYM1 ER / 5 K5.0 IP
2026-04-01 vs DET0 ER / 2 K6.0 IP
2026-03-26 @ LAD4 ER / 2 K4.0 IP