Mithrandir Metrics
Player Toronto Blue Jays Refreshed Jun 12 06:00 AM ET
Player profile / Toronto Blue Jays

Trey Yesavage

P · Bats/Throws R/R · 6' 4", 225 lb · Age 22

Cards
10
Modules
1
Live Δ
yes
Club Toronto Blue Jays Position P Roster Active Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2025103.2133014.0161.43
2026333.7899047.2471.26
2 Seasons433.651212061.2631.30
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.

2026-06-12
68
Pitching
percentile
Pitching9 metrics
72
Arsenal3 metrics
58
Rolling projection

Preseason / current pace / Bayesian update

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

2026-06-12
ERA preseason3.92
ERA current pace2.19
ERA rolling p503.19
Observed weight42%
ERA
2.15 2.65 3.19 3.74 4.24
FIP
2.75 3.13 3.56 3.98 4.36
K%
24.7% 26.5% 28.6% 30.7% 32.6%
BB%
7.8% 8.8% 9.9% 11.1% 12.1%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-12
Pitching · percentile strip
WHIP1.17
70
ERA2.19
88
BB%11.0%
24
K%25.4%
70 -21 vs proj
xwOBA allowed0.265
88
Barrel allowed4.6%
87 +40 vs proj
Fastball velo94.3
50
Hard-hit allowed32.1%
90
Whiff%27.6%
81 -16 vs proj
Mithrandir+

Stuff+ and arsenal context

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

2026-06-12
Fastball Stuff+105
71
Mithrandir Stuff+102
51
Slider Stuff+102
52
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 Yesavage, Trey · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.265 2026-06-01: 0.2522026-06-02: 0.2522026-06-03: 0.2522026-06-04: 0.2522026-06-05: 0.2522026-06-06: 0.2652026-06-07: 0.2652026-06-08: 0.2652026-06-09: 0.2652026-06-10: 0.2652026-06-11: 0.2652026-06-12: 0.265 2026-06-01 2026-06-12 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.

3Pitches 2026Season 46%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 Yesavage, Trey · Aggregate zone metrics; not pitch-by-pitch locations Edge: 38%38%Zone: 44%44%Whiff: 28%28%Called strike: 13%13%First pitch strike: 49%49%Hard hit allowed: 32%32% 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 Yesavage, Trey · 2026 arsenal snapshot 4-Seam Fastball: 45.8%Split-Finger: 32.7%Slider: 21.5% FF46% · 94 mphprimary pitch FF 46%FS 33%SL 21% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Yesavage, Trey · 2026 arsenal snapshot 9″18″27″36″ 4-Seam Fastball: 46% usage, 0″ horizontal break, 11″ drop, 94.3 mphFF94 mphSplit-Finger: 33% usage, 6″ horizontal break, 33″ drop, 82.8 mphFS83 mphSlider: 21% usage, 2″ horizontal break, 29″ drop, 88.5 mphSL88 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 68.1% 276 105 qualified
SL 31.9% 129 102 limited sample
Method note

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

Reference layer

Current snapshot

Age22
Height6' 4"
Weight225 lb
Debut2025-09-15
Live layer

Delta / regression

ERA Δ-1.58
K% Δ-0.046

positive regression

Regression watch

Unlucky so far. Better days ahead.

0.5σ gap
wOBA-against (actual)0.282
xwOBA-against (deserved)0.265

Yesavage’s wOBA-against sits at 0.282, but the quality of contact underneath says it should be 0.265 — a gap of 0.017, 0.5 standard deviations from the MLB norm over 43 IP. The results have been worse than the process deserves; as the sample grows, expect the numbers to climb back toward the underlying level.

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching102026-05-254-Seam Fastball played up through FF/FS tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202630.0% K | 3.77 ERAProjection
2026-05-20 @ NYY0 ER / 8 K6.0 IP