Mithrandir Metrics
Player STL Refreshed Sep 28 06:00 AM ET
Player profile / STL

Gordon Graceffo

Player · Bats/Throws R/R · 6' 4", 220 lb · Age 26

Cards
1
Modules
1
Live Δ
yes
Club STL Position -- Roster profile Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024014.702107.261.17
2025316.28260143.0401.47
2026822.67621181.0631.10
3 Seasons1143.969022131.21091.22
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
53
Pitching
percentile
Pitching9 metrics
43
Arsenal7 metrics
41
Rolling projection

Preseason / current pace / Bayesian update

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

Pending

Rolling player projection appears after current-season Statcast and projection joins refresh.

Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-28
Pitching · percentile strip
WHIP1.09
87
ERA2.73
87
BB%10.9%
27
K%19.1%
30
xwOBA allowed0.328
32
Barrel allowed8.8%
28
Fastball velo95.3
64
Hard-hit allowed43.8%
16
Whiff%18.6%
16
Mithrandir+

Stuff+ and arsenal context

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

2026-09-28
Fastball Stuff+103
58
Mithrandir Stuff+100
32
Slider Stuff+100
37
Changeup Stuff+102
51
Curveball Stuff+99
11
Cutter Stuff+110
99
Sinker Stuff+86
2
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 Graceffo, Gordon · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.328 2026-09-14: 0.3242026-09-18: 0.3232026-09-19: 0.3232026-09-20: 0.3232026-09-21: 0.3252026-09-22: 0.3252026-09-23: 0.3252026-09-24: 0.3252026-09-25: 0.3252026-09-26: 0.3232026-09-27: 0.3282026-09-28: 0.328 2026-09-14 2026-09-28 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 38%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 Graceffo, Gordon · Aggregate zone metrics; not pitch-by-pitch locations Edge: 36%36%Zone: 44%44%Whiff: 19%19%Called strike: 15%15%First pitch strike: 44%44%Hard hit allowed: 44%44% 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 Graceffo, Gordon · 2026 arsenal snapshot 4-Seam Fastball: 38.3%Slider: 18.3%Cutter: 14.7%Changeup: 13.6%Curveball: 8.1%Sinker: 7.0% FF38% · 95 mphprimary pitch FF 38%SL 18%FC 15%CH 14%CU 8%SI 7% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Graceffo, Gordon · 2026 arsenal snapshot 15″30″45″60″ 4-Seam Fastball: 38% usage, 1″ horizontal break, 15″ drop, 95.3 mphFF95 mphSlider: 18% usage, 0″ horizontal break, 39″ drop, 86.7 mphSL87 mphCutter: 15% usage, 1″ horizontal break, 31″ drop, 89.4 mphFC89 mphChangeup: 14% usage, 11″ horizontal break, 31″ drop, 88.2 mphCH88 mphCurveball: 8% usage, 0″ horizontal break, 56″ drop, 83.2 mphCU83 mphSinker: 7% usage, 13″ horizontal break, 18″ drop, 94.8 mphSI95 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 38.8% 282 103 qualified
SL 28.8% 209 100 qualified
CH 12.7% 92 102 limited sample
CB 10.5% 76 99 limited sample
SI 7.0% 51 86 limited sample
FC 2.2% 16 110 limited sample
Method note

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

Reference layer

Current snapshot

MLB bio context is unavailable.
Live layer

Delta / regression

ERA Δ--
K% Δ--

negative regression

Regression watch

Running hot. Expect some cooling.

-2.0σ gap
wOBA-against (actual)0.270
xwOBA-against (deserved)0.328

Graceffo’s wOBA-against sits at 0.270, but the quality of contact underneath says it should be 0.328 — a gap of 0.058, -2.0 standard deviations from the MLB norm over 82 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
Pitching12026-08-27Slider played up through SL/FF tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202622.5% K | 4.09 ERAProjection