Mithrandir Metrics
Player Pittsburgh Pirates Refreshed Jun 1 06:00 AM ET
Player profile / Pittsburgh Pirates

Mitch Keller

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

Cards
15
Modules
1
Live Δ
yes
Club Pittsburgh Pirates 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 preseason4.39
ERA current pace3.64
ERA rolling p503.97
Observed weight57%
ERA
3.08 3.50 3.97 4.43 4.85
FIP
3.31 3.55 3.81 4.07 4.30
K%
17.6% 18.8% 20.2% 21.5% 22.8%
BB%
5.8% 6.5% 7.2% 7.9% 8.6%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-01
Pitching · percentile strip
BB%7.6%
66
Barrel allowed6.2%
70 +31 vs proj
Fastball velo93.0
27
Hard-hit allowed38.8%
52
K%19.7%
30
Whiff%19.6%
20
xwOBA allowed0.328
39
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+104
66
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 Keller, Mitch · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.314 2026-05-17: 0.3262026-05-19: 0.3262026-05-21: 0.3262026-05-23: 0.3262026-05-24: 0.3262026-05-25: 0.3242026-05-26: 0.3242026-05-28: 0.3242026-05-29: 0.3242026-05-30: 0.3242026-05-31: 0.3242026-06-01: 0.328 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.

7Pitches 2026Season 33%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 Keller, Mitch · Aggregate zone metrics; not pitch-by-pitch locations Edge: 37%37%Zone: 48%48%Whiff: 20%20%Called strike: 16%16%First pitch strike: 47%47%Hard hit allowed: 39%39% 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 Keller, Mitch · 2026 arsenal snapshot 4-Seam Fastball: 33.2%Sweeper: 18.0%Sinker: 17.9%Changeup: 10.1%Curveball: 7.8%Slider: 7.8% MIX FF 33%ST 18%SI 18%CH 10%CU 8%SL 8% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Keller, Mitch · 2026 arsenal snapshot FF: HB -0.2, IVB 1.3FFST: HB -0.3, IVB 3.2STSI: HB 0.3, IVB 2.1SICH: HB -0.9, IVB 2.7CHCU: HB 0.9, IVB 4.8CUSL: HB 0.0, IVB 2.8SLFC: HB 0.1, IVB 1.9FC horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 33.8% 326 105 qualified
SL 25.7% 248 106 qualified
SI 16.5% 159 97 limited sample
CH 10.4% 100 106 limited sample
CB 7.3% 70 98 limited sample
FC 6.3% 61 104 limited sample
Method note

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

Reference layer

Current snapshot

Age30
Height6' 3"
Weight213 lb
Debut2019-05-27
Live layer

Delta / regression

ERA Δ-0.49
K% Δ-0.010

positive regression

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching152026-05-244-Seam Fastball played up through FF/SL tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202620.7% K | 4.13 ERAProjection
2026-04-14 vs WSH5 ER / 3 K4.0 IP
2026-04-08 vs SD0 ER / 4 K6.0 IP
2026-04-03 vs BAL2 ER / 4 K6.0 IP