Mithrandir Metrics
Pitcher projection 2026 Refreshed Jun 1 06:00 AM ET
Pitcher projection / LAD · 2026

Yamamoto, Yoshinobu

Run-prevention profile built on workable command

Primary
25.9% K%
Range
23.5% to 34.2%
Live Δ
yes
Team LAD Archetype Balanced starter Age 28 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 preseason3.06
ERA current pace3.09
ERA rolling p503.08
Observed weight55%
ERA
2.18 2.60 3.08 3.55 3.98
FIP
2.62 2.95 3.31 3.68 4.01
K%
23.3% 24.8% 26.4% 28.0% 29.4%
BB%
4.9% 5.6% 6.3% 7.1% 7.8%
Current percentile strip

Actual percentile with projection tick

100th = best in MLB.

2026-06-01
Pitching · percentile strip
BB%5.6%
90 +28 vs proj
Barrel allowed7.3%
56
Fastball velo95.7
72
Hard-hit allowed40.1%
45
K%26.4%
77
Whiff%26.7%
75
xwOBA allowed0.303
61
Mithrandir+

Stuff+ and arsenal context

Stuff+ appears when the current pitch-event scoring artifact includes this pitcher; Arsenal Decomposition remains descriptive support under Stuff+.

2026-06-01
Mithrandir Stuff+107
86
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 28%Top usage
ride armside gloveside +Arsenal gap +Shape contrast
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 2026-05-17: 0.3172026-05-19: 0.3172026-05-21: 0.3092026-05-23: 0.3092026-05-24: 0.3092026-05-25: 0.3092026-05-26: 0.3092026-05-28: 0.3092026-05-29: 0.3092026-05-30: 0.3092026-05-31: 0.3092026-06-01: 0.303 2026-05-17 2026-06-01 xwOBA allowed MITHRANDIR · CHARTS
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: 48%48%Whiff: 27%27%Called strike: 16%16%First pitch strike: 50%50%Hard hit allowed: 40%40% 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 Yamamoto, Yoshinobu · 2026 arsenal snapshot Split-Finger: 27.9%4-Seam Fastball: 26.4%Cutter: 14.4%Curveball: 13.2%Sinker: 11.8%Slider: 6.4% MIX FS 28%FF 26%FC 14%CU 13%SI 12%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 FS: HB -0.2, IVB 2.6FSFF: HB -0.2, IVB 1.1FFFC: HB 0.0, IVB 2.1FCCU: HB 0.2, IVB 5.2CUSI: HB 0.7, IVB 1.5SISL: HB -0.3, IVB 2.8SL horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 37.4% 286 105 qualified
FC 20.4% 156 105 limited sample
CB 17.4% 133 107 limited sample
SI 16.3% 125 103 limited sample
SL 8.5% 65 110 limited sample
Method note

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

Model read

Projection notes

1
templated note
Home park slightly inflates the home-run risk band.
pitcher
2
templated note
Primary mix entering the season: 4-Seam Fastball 34%, Split-Finger 26%, Curveball 18%.
pitcher
Live context

Current-season signal

ERA Δ-0.68
K% Δ+0.005
Sample73.0 IP

negative regression

Projection table

Point projection and range

MetricPointRangeHalf-width
Innings76.2----
Batters Faced308----
K%25.9%23.5% to 34.2%+/- 5.3%
BB%7.9%5.6% to 10.3%+/- 2.3%
Whiff%25.2%23.3% to 31.3%+/- 4.0%
HR/91.280.51 to 1.64+/- 0.57
xwOBA Against0.3070.246 to 0.309+/- 0.032
Barrel% Allowed7.9%5.4% to 10.9%+/- 2.7%
ERA3.772.10 to 4.63+/- 1.27
FIP3.692.20 to 4.16+/- 0.98
WHIP1.2000.887 to 1.392+/- 0.253
Platoon / Shape
vs LHH

611 career BF

xwOBA0.252
K%25.5%
BB%7.5%
Barrel5.3%
vs RHH

663 career BF

xwOBA0.270
K%26.4%
BB%7.1%
Barrel8.4%