Mithrandir Metrics
Player Kansas City Royals Refreshed Sep 27 06:00 AM ET
Player profile / Kansas City Royals

Tony Gonsolin

P · Bats/Throws R/R · 6' 3", 205 lb · Age 32

Cards
1
Modules
1
Live Δ
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Club Kansas City Royals Position P Roster Current MLB team Status IL-15
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2023854.9820200103.0821.22
2025325.0077036.0381.42
20260016.881002.252.63
7 Seasons37133.4387781414.13921.09
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
11
Pitching
percentile
Arsenal2 metrics
11
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 preseason4.13
ERA current pace16.88
ERA rolling p504.88
Observed weight6%
ERA
3.26 4.03 4.88 5.74 6.50
FIP
3.44 4.05 4.72 5.39 6.00
K%
18.0% 20.8% 23.8% 26.9% 29.7%
BB%
7.1% 8.3% 9.7% 11.0% 12.2%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-27
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
Fastball Stuff+93
8
Mithrandir Stuff+96
14
Rolling form chart

xwOBA allowed snapshot line

Live snapshot series; true 50/100 PA windows require PA-level logs

0 snapshots
No chart yet

No Live State xwOBA snapshots are available for this player.

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 2025Season 40%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 Gonsolin, Tony · Aggregate zone metrics; not pitch-by-pitch locations Edge: 33%33%Zone: 37%37%Whiff: 27%27%Called strike: 21%21%First pitch strike: 40%40%Hard hit allowed: 29%29% Dashed border = aggregate mixed-batter zone proxy MITHRANDIR · CHARTS
Pitch arsenal

Usage mix, movement map, and Stuff+ composition

2025 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 →

2025
Mithrandir Metrics PITCH ARSENAL DONUT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Gonsolin, Tony · 2025 arsenal snapshot 4-Seam Fastball: 40.2%Split-Finger: 26.8%Curveball: 16.9%Slider: 16.1% FF40% · 94 mphprimary pitch FF 40%FS 27%CU 17%SL 16% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Gonsolin, Tony · 2025 arsenal snapshot 15″30″45″60″ 4-Seam Fastball: 40% usage, 3″ horizontal break, 15″ drop, 93.5 mphFF94 mphSplit-Finger: 27% usage, 3″ horizontal break, 40″ drop, 84.2 mphFS84 mphCurveball: 17% usage, 3″ horizontal break, 54″ drop, 81.7 mphCU82 mphSlider: 16% usage, 1″ horizontal break, 29″ drop, 88.1 mphSL88 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 78.7% 37 93 limited sample
SL 17.0% 8 99 limited sample
CB 4.3% 2 108 limited sample
Method note

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

Reference layer

Current snapshot

Age32
Height6' 3"
Weight205 lb
Debut2019-06-26
Live layer

Delta / regression

No Live State delta is available for this profile yet.

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching12023-08-024-Seam Fastball played up through FF/FS tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202621.2% K | 4.11 ERAProjection