Mithrandir Metrics
Player Arizona Diamondbacks Refreshed Jun 14 06:00 AM ET
Player profile / Arizona Diamondbacks

Jonathan Loáisiga

P · Bats/Throws R/R · 5' 11", 195 lb · Age 31

Cards
0
Modules
0
Live Δ
yes
Club Arizona Diamondbacks Position P Roster Active Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024100.003004.032.00
2025014.25300129.2251.48
2026123.12290126.0171.19
9 Seasons20143.50222119275.12491.25
At a glance

Season percentile report

The headline weighs outcome stats (xwOBA, barrels); each bar averages its full strip group below. 100 = best in MLB.

2026-06-14
60
Pitching
percentile
Pitching9 metrics
62
Arsenal5 metrics
76
Rolling projection

Preseason / current pace / Bayesian update

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

2026-06-14
ERA preseason3.22
ERA current pace3.12
ERA rolling p503.19
Observed weight33%
ERA
1.48 2.29 3.19 4.09 4.90
FIP
2.88 3.40 3.98 4.56 5.08
K%
12.7% 15.3% 18.2% 21.1% 23.7%
BB%
3.5% 4.7% 6.1% 7.4% 8.6%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-14
Pitching · percentile strip
WHIP1.21
67
ERA3.12
68
BB%5.9%
87
K%17.6%
17 -22 vs proj
xwOBA allowed0.301
63
Barrel allowed6.7%
65
Fastball velo97.3
91
Hard-hit allowed37.8%
58
Whiff%22.2%
44
Mithrandir+

Stuff+ and arsenal context

How nasty this pitcher's stuff grades in our pitch-level model. Missing coverage is shown explicitly.

2026-06-14
Changeup Stuff+101
43
Curveball Stuff+106
98
Fastball Stuff+102
50
Mithrandir Stuff+108
90
Sinker Stuff+113
99
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 0.314 0.301 2026-06-03: 0.2992026-06-04: 0.3142026-06-05: 0.3102026-06-06: 0.3102026-06-07: 0.3102026-06-08: 0.3102026-06-09: 0.3102026-06-10: 0.3102026-06-11: 0.3102026-06-12: 0.3082026-06-13: 0.3082026-06-14: 0.301 2026-06-03 2026-06-14 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: 50%50%Hard hit allowed: 38%38% 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.

Watch the pitches in 3D →

2026
Mithrandir Metrics PITCH ARSENAL DONUT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Loáisiga, Jonathan · 2026 arsenal snapshot Sinker: 30.3%Changeup: 29.7%4-Seam Fastball: 20.4%Curveball: 19.6% SI30% · 97 mphprimary pitch SI 30%CH 30%FF 20%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 9″18″27″36″ Sinker: 30% usage, 9″ horizontal break, 21″ drop, 97.4 mphSI97 mphChangeup: 30% usage, 13″ horizontal break, 29″ drop, 90.4 mphCH90 mph4-Seam Fastball: 20% usage, 6″ horizontal break, 16″ drop, 97.3 mphFF97 mphCurveball: 20% usage, 2″ horizontal break, 33″ drop, 89.1 mphCU89 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
SI 31.8% 103 113 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-0.66
K% Δ-0.034
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