Mithrandir Metrics
Player Los Angeles Dodgers Refreshed Jul 18 06:00 AM ET
Player profile / Los Angeles Dodgers

Yoshinobu Yamamoto

P · Bats/Throws R/R · 5' 10", 176 lb · Age 27

Cards
21
Modules
1
Live Δ
yes
Club Los Angeles Dodgers Position P Roster Active Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024723.001818090.01051.11
20251282.4930300173.22010.99
2026962.8517170110.21060.91
3 Seasons28162.7265650374.14121.00
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.

2026-07-18
83
Pitching
percentile
Pitching9 metrics
77
Arsenal6 metrics
83
Rolling projection

Preseason / current pace / Bayesian update

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

2026-07-18
ERA preseason3.06
ERA current pace2.85
ERA rolling p502.92
Observed weight65%
ERA
1.99 2.43 2.92 3.42 3.86
FIP
2.53 2.88 3.26 3.64 3.98
K%
23.3% 24.5% 25.8% 27.1% 28.3%
BB%
5.1% 5.7% 6.4% 7.0% 7.6%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-07-18
Pitching · percentile strip
WHIP0.92
94
ERA2.85
79
BB%5.9%
88 +26 vs proj
K%25.5%
71
xwOBA allowed0.280
82 +25 vs proj
Barrel allowed6.3%
71 +26 vs proj
Fastball velo95.8
72
Hard-hit allowed35.7%
71
Whiff%24.6%
62
Mithrandir+

Stuff+ and arsenal context

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

2026-07-18
Fastball Stuff+106
76
Mithrandir Stuff+107
88
Curveball Stuff+105
94
Cutter Stuff+105
76
Sinker Stuff+104
69
Slider Stuff+112
97
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 0.314 0.280 2026-07-07: 0.2842026-07-08: 0.2842026-07-09: 0.2842026-07-10: 0.2842026-07-11: 0.2842026-07-12: 0.2842026-07-13: 0.2802026-07-14: 0.2802026-07-15: 0.2802026-07-16: 0.2802026-07-17: 0.2802026-07-18: 0.280 2026-07-07 2026-07-18 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: 39%39%Zone: 49%49%Whiff: 25%25%Called strike: 16%16%First pitch strike: 49%49%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: 27.2%4-Seam Fastball: 26.5%Curveball: 13.6%Cutter: 13.0%Sinker: 12.7%Slider: 7.0% FS27% · 91 mphprimary pitch FS 27%FF 27%CU 14%FC 13%SI 13%SL 7% 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, 2″ horizontal break, 31″ drop, 91.4 mphFS91 mph4-Seam Fastball: 27% usage, 2″ horizontal break, 13″ drop, 96.0 mphFF96 mphCurveball: 14% usage, 2″ horizontal break, 62″ drop, 77.1 mphCU77 mphCutter: 13% usage, 0″ horizontal break, 25″ drop, 91.4 mphFC91 mphSinker: 13% usage, 9″ horizontal break, 18″ drop, 95.4 mphSI95 mphSlider: 7% usage, 4″ horizontal break, 34″ drop, 87.1 mphSL87 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 36.6% 310 106 qualified
FC 19.6% 166 105 limited sample
CB 17.8% 151 105 limited sample
SI 17.1% 145 104 limited sample
SL 8.7% 74 112 limited sample
Method note

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

Reference layer

Current snapshot

Age27
Height5' 10"
Weight176 lb
Debut2024-03-21
Live layer

Delta / regression

ERA Δ-0.92
K% Δ-0.004

negative regression

Regression watch

Running hot. Expect some cooling.

-0.6σ gap
wOBA-against (actual)0.264
xwOBA-against (deserved)0.280

Yamamoto’s wOBA-against sits at 0.264, but the quality of contact underneath says it should be 0.280 — a gap of 0.016, -0.6 standard deviations from the MLB norm over 114 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
Pitching212026-07-11Splitter played up through FS/FF 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