Mithrandir Metrics
Player Seattle Mariners Refreshed Jul 17 06:00 AM ET
Player profile / Seattle Mariners

Bryce Miller

P · Bats/Throws R/R · 6' 2", 200 lb · Age 27

Cards
8
Modules
1
Live Δ
yes
Club Seattle Mariners Position P Roster Active Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
20241282.9431310180.11710.98
2025465.681818090.1741.41
2026442.271110063.1710.88
4 Seasons28253.7785840465.14351.09
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
97
Pitching
percentile
Pitching9 metrics
87
Arsenal4 metrics
74
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 preseason3.80
ERA current pace2.19
ERA rolling p503.04
Observed weight47%
ERA
2.09 2.54 3.04 3.54 3.98
FIP
2.55 3.05 3.61 4.17 4.67
K%
23.0% 24.5% 26.3% 28.1% 29.7%
BB%
4.5% 5.1% 5.8% 6.5% 7.1%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-07-17
Pitching · percentile strip
WHIP0.84
98
ERA2.19
94
BB%4.2%
99 +24 vs proj
K%30.2%
93 +45 vs proj
xwOBA allowed0.236
98 +55 vs proj
Barrel allowed6.4%
70 +30 vs proj
Fastball velo96.2
77
Hard-hit allowed28.6%
96
Whiff%24.4%
60
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+101
30
Fastball Stuff+115
99
Mithrandir Stuff+112
99
Slider Stuff+104
68
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 Miller, Bryce · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.314 0.236 2026-07-06: 0.2262026-07-07: 0.2262026-07-08: 0.2262026-07-09: 0.2262026-07-10: 0.2262026-07-11: 0.2362026-07-12: 0.2362026-07-13: 0.2362026-07-14: 0.2362026-07-15: 0.2362026-07-16: 0.2362026-07-17: 0.236 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.

7Pitches 2026Season 43%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 Miller, Bryce · Aggregate zone metrics; not pitch-by-pitch locations Edge: 40%40%Zone: 51%51%Whiff: 24%24%Called strike: 13%13%First pitch strike: 52%52%Hard hit allowed: 29%29% 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 Miller, Bryce · 2026 arsenal snapshot 4-Seam Fastball: 42.6%Split-Finger: 24.4%Slider: 11.8%Sweeper: 6.3%Cutter: 5.5%Knuckle Curve: 4.9% FF43% · 96 mphprimary pitch FF 43%FS 24%SL 12%ST 6%FC 5%KC 5% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Miller, Bryce · 2026 arsenal snapshot 15″30″45″60″ 4-Seam Fastball: 43% usage, 0″ horizontal break, 11″ drop, 96.3 mphFF96 mphSplit-Finger: 24% usage, 3″ horizontal break, 33″ drop, 85.1 mphFS85 mphSlider: 12% usage, 1″ horizontal break, 33″ drop, 87.8 mphSL88 mphSweeper: 6% usage, 13″ horizontal break, 45″ drop, 84.1 mphST84 mphCutter: 5% usage, 1″ horizontal break, 24″ drop, 90.8 mphFC91 mphKnuckle Curve: 5% usage, 4″ horizontal break, 52″ drop, 83.1 mphKC83 mphSinker: 4% usage, 8″ horizontal break, 16″ drop, 95.5 mphSI96 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 56.2% 140 115 limited sample
SL 35.3% 88 104 limited sample
CB 5.6% 14 101 limited sample
SI 2.8% 7 109 limited sample
Method note

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

Reference layer

Current snapshot

Age27
Height6' 2"
Weight200 lb
Debut2023-05-02
Live layer

Delta / regression

ERA Δ-1.96
K% Δ+0.080

positive regression

Regression watch

Unlucky so far. Better days ahead.

0.7σ gap
wOBA-against (actual)0.258
xwOBA-against (deserved)0.236

Miller’s wOBA-against sits at 0.258, but the quality of contact underneath says it should be 0.236 — a gap of 0.022, 0.7 standard deviations from the MLB norm over 57 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
Pitching82026-07-09Four-Seam Fastball played up through SI/SL tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202622.2% K | 4.15 ERAProjection