Mithrandir Metrics
Player New York Yankees Refreshed Sep 27 06:00 AM ET
Player profile / New York Yankees

Yerry De los Santos

P · Bats/Throws R/R · 6' 3", 230 lb · Age 28

Cards
0
Modules
0
Live Δ
yes
Club New York Yankees Position P Roster Current MLB team Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2023113.33220024.1181.23
2025013.28250035.2281.51
2026102.05160022.0171.27
4 Seasons253.438903107.2891.35
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
50
Pitching
percentile
Pitching9 metrics
46
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.

2026-09-27
ERA preseason3.81
ERA current pace2.04
ERA rolling p503.26
Observed weight31%
ERA
1.63 2.40 3.26 4.11 4.89
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%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-27
Pitching · percentile strip
WHIP1.40
37
ERA2.04
95
BB%7.3%
73 +40 vs proj
K%17.4%
17 -19 vs proj
xwOBA allowed0.334
28 -19 vs proj
Barrel allowed6.1%
73
Fastball velo95.2
62
Hard-hit allowed42.7%
20
Whiff%15.9%
5 -35 vs proj
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
Changeup Stuff+101
40
Fastball Stuff+103
54
Mithrandir Stuff+107
88
Sinker Stuff+108
90
Slider Stuff+98
21
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 2026-09-13: 0.3082026-09-14: 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: 0.334 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.

4Pitches 2026Season 57%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 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.

Watch the pitches in 3D →

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% 59 101 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.

Reference layer

Current snapshot

Age28
Height6' 3"
Weight230 lb
Debut2022-05-25
Live layer

Delta / regression

ERA Δ-1.78
K% Δ-0.026
Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
No Mithrandir card history is available for this player yet.
Projection links / recent games

Available detail

Pitcher Projections 202620.1% K | 3.82 ERAProjection
2026-08-15 @ TOR0 ER / 0 K0.1 IP
2026-04-14 vs LAA1 ER / 1 K2.0 IP