Mithrandir Metrics
Player Scranton/Wilkes-Barre RailRiders Refreshed Jun 1 06:00 AM ET
Player profile / Scranton/Wilkes-Barre RailRiders

Kervin Castro

P profile with live context, projection links, and Mithrandir card history when available.

Cards
0
Modules
0
Live Δ
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Club Scranton/Wilkes-Barre RailRiders Position P Roster Reassigned to Minors Status Out / inactive
Rolling projection

Preseason / current pace / Bayesian update

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

2026-06-01
ERA preseason2.54
ERA current pace4.50
ERA rolling p502.71
Observed weight8%
ERA
0.49 1.54 2.71 3.88 4.93
FIP
0.92 1.89 2.98 4.07 5.04
K%
11.5% 15.5% 19.9% 24.4% 28.4%
BB%
0.1% 2.3% 4.8% 7.3% 9.5%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-01
Mithrandir+

Stuff+ and arsenal context

Stuff+ appears when the current pitch-event scoring artifact includes this pitcher; missing coverage is shown explicitly.

2026-06-01
Mithrandir Stuff+112
99
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.

5Pitches 2025Season 43%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 Castro, Kervin · Aggregate zone metrics; not pitch-by-pitch locations Edge: 26%26%Zone: 51%51%Whiff: 18%18%Called strike: 14%14%First pitch strike: 45%45%Hard hit allowed: 53%53% 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.

2025
Mithrandir Metrics PITCH ARSENAL DONUT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Castro, Kervin · 2025 arsenal snapshot Cutter: 43.2%4-Seam Fastball: 32.4%Sweeper: 18.9%Curveball: 2.7%Sinker: 2.7% MIX FC 43%FF 32%ST 19%CU 3%SI 3% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Castro, Kervin · 2025 arsenal snapshot FC: HB -0.2, IVB 2.0FCFF: HB -0.0, IVB 1.1FFST: HB -1.1, IVB 2.6STCU: HB 0.5, IVB 4.8CUSI: HB -1.0, IVB 1.8SI horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 48.3% 14 105 limited sample
FC 37.9% 11 114 limited sample
SI 13.8% 4 103 limited sample
Method note

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

Reference layer

Current snapshot

Age27
Height5' 10"
Weight234 lb
Debut2021-09-07
Live layer

Delta / regression

No Live State delta is available for this profile yet.

Mithrandir coverage

Module shelf

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

Available detail

Pitcher Projections 202624.0% K | 3.64 ERAProjection
2026-03-23 @ CHC0 ER / 2 K1.0 IP
2026-03-19 @ TOR2 ER / 0 K0.2 IP
2026-03-11 vs TOR0 ER / 1 K1.1 IP