Mithrandir Metrics
Player Arizona Diamondbacks Refreshed Jun 2 06:00 AM ET
Player profile / Arizona Diamondbacks

Jonathan Loáisiga

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

Cards
0
Modules
0
Live Δ
yes
Club Arizona Diamondbacks 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.

2026-06-02
ERA preseason3.22
ERA current pace2.66
ERA rolling p503.06
Observed weight29%
ERA
1.30 2.14 3.06 3.98 4.82
FIP
2.89 3.42 4.02 4.61 5.14
K%
12.3% 15.1% 18.1% 21.2% 23.9%
BB%
2.9% 4.2% 5.6% 6.9% 8.2%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-02
Pitching · percentile strip
BB%4.0%
97
Barrel allowed6.5%
69
Fastball velo97.3
91
Hard-hit allowed40.3%
44
K%17.2%
15 -24 vs proj
Whiff%21.8%
40
xwOBA allowed0.299
65
Mithrandir+

Stuff+ and arsenal context

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

2026-06-02
Mithrandir Stuff+107
89
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 Loáisiga, Jonathan · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 2026-05-19: 0.3242026-05-21: 0.3092026-05-23: 0.3092026-05-24: 0.3092026-05-25: 0.3092026-05-26: 0.3082026-05-28: 0.3082026-05-29: 0.3082026-05-30: 0.3082026-05-31: 0.3002026-06-01: 0.2992026-06-02: 0.299 2026-05-19 2026-06-02 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.

4Pitches 2026Season 30%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 Loáisiga, Jonathan · Aggregate zone metrics; not pitch-by-pitch locations Edge: 37%37%Zone: 46%46%Whiff: 22%22%Called strike: 12%12%First pitch strike: 49%49%Hard hit allowed: 40%40% 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 Loáisiga, Jonathan · 2026 arsenal snapshot Sinker: 29.5%Changeup: 28.0%4-Seam Fastball: 22.4%Curveball: 20.1% MIX SI 30%CH 28%FF 22%CU 20% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Loáisiga, Jonathan · 2026 arsenal snapshot SI: HB 0.7, IVB 1.8SICH: HB -1.1, IVB 2.4CHFF: HB -0.5, IVB 1.3FFCU: HB -0.2, IVB 2.8CU horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
SI 31.8% 103 112 limited sample
CH 27.5% 89 101 limited sample
FB 21.3% 69 102 limited sample
CB 19.4% 63 106 limited sample
Method note

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

Reference layer

Current snapshot

Age31
Height5' 11"
Weight195 lb
Debut2018-06-15
Live layer

Delta / regression

ERA Δ-1.12
K% Δ-0.038
Mithrandir coverage

Module shelf

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

Available detail

Pitcher Projections 202621.0% K | 3.78 ERAProjection
2026-04-17 vs TOR1 ER / 1 K1.0 IP
2026-04-13 @ BAL2 ER / 0 K0.2 IP
2026-04-12 @ PHI0 ER / 0 K1.0 IP
2026-04-07 @ NYM1 ER / 1 K1.0 IP
2026-04-05 vs ATL1 ER / 1 K1.0 IP