Mithrandir Metrics
Pitcher projection 2026 Refreshed Sep 28 06:00 AM ET
Pitcher projection / NYY · 2026

De Los Santos, Yerry

Run-prevention profile built on workable command

Primary
20.1% K%
Range
12.6% to 27.6%
Live Δ
yes
Team NYY Archetype Offspeed mix artist Age 29 Status Healthy / active roster
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.

2026-09-28
50
Pitching
percentile
Pitching9 metrics
45
Arsenal5 metrics
59
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-28
ERA preseason3.81
ERA current pace2.04
ERA rolling p503.26
Observed weight31%
ERA
1.63 2.40 3.26 4.11 4.88
FIP
2.71 3.41 4.19 4.96 5.66
K%
13.7% 16.2% 19.0% 21.9% 24.4%
BB%
6.2% 7.6% 9.1% 10.6% 12.0%
Current percentile strip

Actual percentile with projection tick

100th = best in MLB.

2026-09-28
Pitching · percentile strip
WHIP1.40
36
ERA2.04
95
BB%7.3%
73 +41 vs proj
K%17.4%
17 -19 vs proj
xwOBA allowed0.334
27 -19 vs proj
Barrel allowed6.1%
73
Fastball velo95.2
62
Hard-hit allowed42.7%
21
Whiff%15.9%
5 -35 vs proj
Mithrandir+

Stuff+ and arsenal context

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

2026-09-28
Changeup Stuff+100
40
Fastball Stuff+103
54
Mithrandir Stuff+107
89
Sinker Stuff+108
90
Slider Stuff+98
21
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.

4Pitches 2026Season 57%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 De Los Santos, Yerry · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.334 2026-09-14: 0.3082026-09-18: 0.3082026-09-19: 0.3082026-09-20: 0.3082026-09-21: 0.3082026-09-22: 0.3082026-09-23: 0.3082026-09-24: 0.3082026-09-25: 0.3082026-09-26: 0.3342026-09-27: 0.3342026-09-28: 0.334 2026-09-14 2026-09-28 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 De Los Santos, Yerry · Aggregate zone metrics; not pitch-by-pitch locations Edge: 34%34%Zone: 55%55%Whiff: 16%16%Called strike: 18%18%First pitch strike: 56%56%Hard hit allowed: 43%43% 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 De Los Santos, Yerry · 2026 arsenal snapshot Sinker: 57.1%Changeup: 24.3%4-Seam Fastball: 12.4%Slider: 6.2% SI57% · 95 mphprimary pitch SI 57%CH 24%FF 12%SL 6% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal De Los Santos, Yerry · 2026 arsenal snapshot 9″18″27″36″ Sinker: 57% usage, 9″ horizontal break, 23″ drop, 95.3 mphSI95 mphChangeup: 24% usage, 7″ horizontal break, 36″ drop, 87.6 mphCH88 mph4-Seam Fastball: 12% usage, 9″ horizontal break, 19″ drop, 94.8 mphFF95 mphSlider: 6% usage, 2″ horizontal break, 33″ drop, 86.2 mphSL86 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
SI 57.6% 151 108 limited sample
CH 22.5% 59 100 limited sample
FB 12.6% 33 103 limited sample
SL 7.3% 19 98 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
Volume stays relief-shaped even when the bat-miss traits are strong.
pitcher
2
templated note
Home park slightly inflates the home-run risk band.
pitcher
3
templated note
Primary mix entering the season: Sinker 52%, Changeup 27%, 4-Seam Fastball 11%.
pitcher
Live context

Current-season signal

ERA Δ-1.78
K% Δ-0.026
Sample25.0 IP
Projection table

Point projection and range

MetricPointRangeHalf-width
Innings31.9----
Batters Faced140----
K%20.1%12.6% to 27.6%+/- 7.5%
BB%10.4%6.9% to 14.7%+/- 3.9%
Whiff%21.4%17.3% to 28.1%+/- 5.4%
HR/91.080.00 to 1.39+/- 0.70
xwOBA Against0.3160.245 to 0.360+/- 0.057
Barrel% Allowed6.9%2.7% to 10.1%+/- 3.7%
ERA3.821.47 to 5.78+/- 2.15
FIP4.222.25 to 6.15+/- 1.95
WHIP1.3201.045 to 1.766+/- 0.361
Platoon / Shape
vs LHH

184 career BF

xwOBA0.271
K%15.3%
BB%10.7%
Barrel4.8%
vs RHH

255 career BF

xwOBA0.252
K%16.9%
BB%8.5%
Barrel4.8%