Mithrandir Metrics
Player Chicago Cubs Refreshed Jun 1 06:00 AM ET
Player profile / Chicago Cubs

Ryan Rolison

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

Cards
0
Modules
0
Live Δ
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Club Chicago Cubs Position P Roster Active Status Healthy / active roster
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 preseason4.08
ERA current pace3.24
ERA rolling p503.87
Observed weight25%
ERA
1.96 2.87 3.87 4.87 5.77
FIP
3.50 4.10 4.77 5.43 6.03
K%
12.7% 15.1% 17.8% 20.5% 22.9%
BB%
7.6% 8.9% 10.3% 11.7% 13.0%
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+100
36
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.

6Pitches 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 Rolison, Ryan · Aggregate zone metrics; not pitch-by-pitch locations Edge: 38%38%Zone: 48%48%Whiff: 15%15%Called strike: 18%18%First pitch strike: 39%39%Hard hit allowed: 47%47% 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.

2026
Mithrandir Metrics PITCH ARSENAL DONUT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Rolison, Ryan · 2026 arsenal snapshot 4-Seam Fastball: 45.7%Slider: 20.6%Curveball: 18.9%Sweeper: 10.3%Sinker: 2.4%Changeup: 2.1% MIX FF 46%SL 21%CU 19%ST 10%SI 2%CH 2% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Rolison, Ryan · 2026 arsenal snapshot FF: HB -0.1, IVB 1.3FFSL: HB -0.0, IVB 3.1SLCU: HB 0.6, IVB 4.8CUST: HB -1.1, IVB 3.2STSI: HB 0.8, IVB 1.4SICH: HB -0.6, IVB 2.4CH horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 45.7% 133 94 limited sample
SL 30.9% 90 108 limited sample
CB 18.9% 55 105 limited sample
SI 2.4% 7 89 limited sample
CH 2.1% 6 113 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' 2"
Weight213 lb
Debut2025-05-13
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 202616.8% K | 4.56 ERAProjection
2026-05-20 vs MIL0 ER / 1 K1.2 IP
2026-04-14 @ PHI0 ER / 0 K1.0 IP