Mithrandir Metrics
Player Arizona Diamondbacks Refreshed Jul 17 06:00 AM ET
Player profile / Arizona Diamondbacks

Zac Gallen

P · Bats/Throws R/R · 6' 2", 189 lb · Age 30

Cards
20
Modules
1
Live Δ
yes
Club Arizona Diamondbacks Position P Roster Injured 15-Day Status IL-15
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
20241463.6528280148.01561.26
202513154.8333330192.01751.26
2026396.341919098.0611.56
8 Seasons69613.8319519501105.111211.19
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.

2026-07-17
19
Pitching
percentile
Pitching9 metrics
17
Arsenal6 metrics
52
Rolling projection

Preseason / current pace / Bayesian update

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

2026-07-17
ERA preseason4.35
ERA current pace6.34
ERA rolling p505.66
Observed weight66%
ERA
4.71 5.16 5.66 6.16 6.61
FIP
4.57 4.85 5.16 5.47 5.75
K%
14.2% 15.2% 16.3% 17.4% 18.4%
BB%
6.0% 6.6% 7.3% 7.9% 8.5%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-07-17
Pitching · percentile strip
WHIP1.62
9
ERA6.34
8
BB%7.2%
73
K%13.2%
3 -37 vs proj
xwOBA allowed0.383
3 -32 vs proj
Barrel allowed11.4%
9 -28 vs proj
Fastball velo93.3
30
Hard-hit allowed45.2%
12
Whiff%17.8%
10 -24 vs proj
Mithrandir+

Stuff+ and arsenal context

How nasty this pitcher's stuff grades in our pitch-level model. Missing coverage is shown explicitly.

2026-07-17
Curveball Stuff+102
43
Fastball Stuff+105
69
Mithrandir Stuff+103
56
Slider Stuff+103
54
Changeup Stuff+105
71
Sinker Stuff+97
16
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 0.383 2026-07-06: 0.3782026-07-07: 0.3782026-07-08: 0.3782026-07-09: 0.3832026-07-10: 0.3832026-07-11: 0.3832026-07-12: 0.3832026-07-13: 0.3832026-07-14: 0.3832026-07-15: 0.3832026-07-16: 0.3832026-07-17: 0.383 2026-07-06 2026-07-17 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.

6Pitches 2026Season 37%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: 44%44%Whiff: 18%18%Called strike: 17%17%First pitch strike: 51%51%Hard hit allowed: 45%45% 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.

Watch the pitches in 3D →

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: 37.1%Slider: 21.1%Knuckle Curve: 18.5%Changeup: 17.7%Sinker: 5.5%Pitch Out: 0.1% FF37% · 93 mphprimary pitch FF 37%SL 21%KC 18%CH 18%SI 6%PO 0% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Gallen, Zac · 2026 arsenal snapshot 15″30″45″60″ 4-Seam Fastball: 37% usage, 1″ horizontal break, 15″ drop, 93.4 mphFF93 mphSlider: 21% usage, 3″ horizontal break, 31″ drop, 88.7 mphSL89 mphKnuckle Curve: 18% usage, 1″ horizontal break, 51″ drop, 81.6 mphKC82 mphChangeup: 18% usage, 8″ horizontal break, 32″ drop, 86.6 mphCH87 mphSinker: 6% usage, 10″ horizontal break, 18″ drop, 92.8 mphSI93 mphPitch Out: 0% usage, 9″ horizontal break, 19″ drop, 89.4 mphPO89 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 37.8% 451 105 qualified
SL 23.5% 280 103 qualified
CB 18.4% 220 102 qualified
CH 14.4% 172 105 limited sample
SI 5.9% 71 97 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+2.13
K% Δ-0.079

positive regression

Regression watch

Unlucky so far. Better days ahead.

1.2σ gap
wOBA-against (actual)0.415
xwOBA-against (deserved)0.383

Gallen’s wOBA-against sits at 0.415, but the quality of contact underneath says it should be 0.383 — a gap of 0.032, 1.2 standard deviations from the MLB norm over 101 IP. The results have been worse than the process deserves; as the sample grows, expect the numbers to climb back toward the underlying level.

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching202026-07-07Four-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