Mithrandir Metrics
Player Texas Rangers Refreshed Jun 1 06:00 AM ET
Player profile / Texas Rangers

Kumar Rocker

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

Cards
11
Modules
1
Live Δ
yes
Club Texas Rangers 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 preseason4.15
ERA current pace3.96
ERA rolling p504.05
Observed weight52%
ERA
2.98 3.49 4.05 4.62 5.13
FIP
3.26 3.57 3.91 4.26 4.57
K%
17.9% 19.4% 20.9% 22.5% 23.9%
BB%
7.5% 8.4% 9.3% 10.2% 11.0%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-01
Pitching · percentile strip
BB%10.5%
28 -32 vs proj
Barrel allowed7.4%
55 +18 vs proj
Fastball velo94.4
52
Hard-hit allowed43.8%
24
K%19.5%
28
Whiff%21.8%
41
xwOBA allowed0.337
29 -19 vs proj
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+99
27
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 Rocker, Kumar · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.314 2026-05-17: 0.3542026-05-19: 0.3542026-05-21: 0.3442026-05-23: 0.3442026-05-24: 0.3442026-05-25: 0.3442026-05-26: 0.3362026-05-28: 0.3362026-05-29: 0.3362026-05-30: 0.3362026-05-31: 0.3362026-06-01: 0.337 2026-05-17 2026-06-01 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 Rocker, Kumar · Aggregate zone metrics; not pitch-by-pitch locations Edge: 35%35%Zone: 46%46%Whiff: 22%22%Called strike: 14%14%First pitch strike: 46%46%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.

2026
Mithrandir Metrics PITCH ARSENAL DONUT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Rocker, Kumar · 2026 arsenal snapshot Slider: 37.6%Sinker: 34.9%4-Seam Fastball: 10.4%Cutter: 10.0%Changeup: 7.0%Pitch Out: 0.1% MIX SL 38%SI 35%FF 10%FC 10%CH 7%PO 0% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Rocker, Kumar · 2026 arsenal snapshot SL: HB -0.0, IVB 3.5SLSI: HB 0.2, IVB 1.9SIFF: HB -0.3, IVB 1.6FFFC: HB 0.0, IVB 2.3FCCH: HB -1.2, IVB 2.4CHPO: HB 0.4, IVB 2.0PO horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
SL 37.5% 318 94 qualified
SI 37.0% 313 101 qualified
FB 9.4% 80 104 limited sample
FC 8.9% 75 96 limited sample
CH 7.2% 61 95 limited sample
Method note

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

Reference layer

Current snapshot

Age26
Height6' 5"
Weight245 lb
Debut2024-09-12
Live layer

Delta / regression

ERA Δ-0.27
K% Δ-0.018

negative regression

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching112026-05-25Slider played up through SL/SI tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202621.3% K | 4.23 ERAProjection
2026-04-15 @ ATH2 ER / 6 K4.2 IP
2026-04-04 vs CIN2 ER / 3 K5.0 IP