Mithrandir Metrics
Player Los Angeles Dodgers Refreshed Sep 27 06:00 AM ET
Player profile / Los Angeles Dodgers

Yoshinobu Yamamoto

P · Bats/Throws R/R · 5' 10", 176 lb · Age 28

Cards
31
Modules
1
Live Δ
yes
Club Los Angeles Dodgers Position P Roster Current MLB team Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024723.001818090.01051.11
20251282.4930300173.22010.99
20261492.5328280185.01820.87
3 Seasons33192.6176760448.24880.97
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.

2026-09-27
89
Pitching
percentile
Pitching9 metrics
81
Arsenal6 metrics
86
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-27
ERA preseason3.06
ERA current pace2.53
ERA rolling p502.66
Observed weight75%
ERA
1.66 2.13 2.66 3.19 3.66
FIP
2.48 2.84 3.25 3.66 4.03
K%
24.1% 25.0% 26.1% 27.2% 28.2%
BB%
5.2% 5.7% 6.3% 6.8% 7.3%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-27
Pitching · percentile strip
WHIP0.88
98
ERA2.53
91
BB%5.9%
90 +27 vs proj
K%26.0%
77
xwOBA allowed0.266
91 +33 vs proj
Barrel allowed6.4%
68 +25 vs proj
Fastball velo95.9
74
Hard-hit allowed36.0%
69
Whiff%25.2%
69
Mithrandir+

Stuff+ and arsenal context

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

2026-09-27
Curveball Stuff+105
92
Cutter Stuff+103
66
Fastball Stuff+107
87
Mithrandir Stuff+107
89
Sinker Stuff+107
84
Slider Stuff+110
96
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 Yamamoto, Yoshinobu · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.266 2026-09-13: 0.2702026-09-14: 0.2702026-09-18: 0.2662026-09-19: 0.2662026-09-20: 0.2662026-09-21: 0.2662026-09-22: 0.2662026-09-23: 0.2662026-09-24: 0.2662026-09-25: 0.2662026-09-26: 0.2662026-09-27: 0.266 2026-09-13 2026-09-27 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 27%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 Yamamoto, Yoshinobu · Aggregate zone metrics; not pitch-by-pitch locations Edge: 40%40%Zone: 48%48%Whiff: 25%25%Called strike: 16%16%First pitch strike: 51%51%Hard hit allowed: 36%36% 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 Yamamoto, Yoshinobu · 2026 arsenal snapshot Split-Finger: 26.7%4-Seam Fastball: 26.0%Cutter: 14.7%Curveball: 13.4%Sinker: 13.1%Slider: 6.2% FS27% · 91 mphprimary pitch FS 27%FF 26%FC 15%CU 13%SI 13%SL 6% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Yamamoto, Yoshinobu · 2026 arsenal snapshot 18″36″54″72″ Split-Finger: 27% usage, 3″ horizontal break, 31″ drop, 91.5 mphFS91 mph4-Seam Fastball: 26% usage, 2″ horizontal break, 14″ drop, 96.1 mphFF96 mphCutter: 15% usage, 0″ horizontal break, 24″ drop, 91.6 mphFC92 mphCurveball: 13% usage, 3″ horizontal break, 63″ drop, 76.9 mphCU77 mphSinker: 13% usage, 6″ horizontal break, 18″ drop, 95.5 mphSI95 mphSlider: 6% usage, 5″ horizontal break, 34″ drop, 86.9 mphSL87 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 36.3% 493 107 qualified
FC 20.5% 279 103 qualified
CB 17.9% 243 105 qualified
SI 17.3% 235 107 qualified
SL 8.0% 108 110 limited sample
Method note

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

Reference layer

Current snapshot

Age28
Height5' 10"
Weight176 lb
Debut2024-03-21
Live layer

Delta / regression

ERA Δ-1.24
K% Δ+0.001

negative regression

Regression watch

Running hot. Expect some cooling.

-0.5σ gap
wOBA-against (actual)0.254
xwOBA-against (deserved)0.266

Yamamoto’s wOBA-against sits at 0.254, but the quality of contact underneath says it should be 0.266 — a gap of 0.012, -0.5 standard deviations from the MLB norm over 188 IP. The results have outrun the underlying process; as the sample grows, expect the numbers to drift back toward the deserved level.

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching312026-09-23Splitter played up through SI/FC tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202625.9% K | 3.77 ERAProjection
2026-04-14 vs NYM1 ER / 7 K7.2 IP
2026-04-07 @ TOR1 ER / 6 K6.0 IP
2026-04-01 vs CLE2 ER / 2 K6.0 IP
2026-03-26 vs AZ2 ER / 6 K6.0 IP