Mithrandir Metrics
Player Miami Marlins Refreshed Jul 17 06:00 AM ET
Player profile / Miami Marlins

Janson Junk

P · Bats/Throws R/R · 6' 2", 197 lb · Age 30

Cards
13
Modules
1
Live Δ
yes
Club Miami Marlins Position P Roster Active Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
20240014.636008.083.25
2025644.1721161110.0771.14
2026454.571212065.0481.31
6 Seasons11124.7748351215.01591.31
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.

2026-07-17
42
Pitching
percentile
Pitching9 metrics
39
Arsenal6 metrics
88
Rolling projection

Preseason / current pace / Bayesian update

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

Pending

Rolling player projection appears after current-season Statcast and projection joins refresh.

Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-07-17
Pitching · percentile strip
WHIP1.45
27
ERA4.57
34
BB%6.6%
81
K%16.7%
13
xwOBA allowed0.309
55
Barrel allowed7.4%
57
Fastball velo94.1
46
Hard-hit allowed41.1%
35
Whiff%14.4%
2
Mithrandir+

Stuff+ and arsenal context

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

2026-07-17
Fastball Stuff+108
89
Mithrandir Stuff+108
92
Slider Stuff+108
90
Changeup Stuff+106
77
Curveball Stuff+104
85
Sinker Stuff+108
93
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 Junk, Janson · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.314 0.309 2026-07-06: 0.3102026-07-07: 0.3102026-07-08: 0.3102026-07-09: 0.3102026-07-10: 0.3102026-07-11: 0.3092026-07-12: 0.3092026-07-13: 0.3092026-07-14: 0.3092026-07-15: 0.3092026-07-16: 0.3092026-07-17: 0.309 2026-07-06 2026-07-17 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 34%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 Junk, Janson · Aggregate zone metrics; not pitch-by-pitch locations Edge: 36%36%Zone: 53%53%Whiff: 14%14%Called strike: 17%17%First pitch strike: 50%50%Hard hit allowed: 41%41% 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 Junk, Janson · 2026 arsenal snapshot 4-Seam Fastball: 34.3%Slider: 22.6%Changeup: 19.5%Sweeper: 13.5%Curveball: 7.3%Sinker: 2.9% FF34% · 94 mphprimary pitch FF 34%SL 23%CH 19%ST 13%CU 7%SI 3% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Junk, Janson · 2026 arsenal snapshot 15″30″45″60″ 4-Seam Fastball: 34% usage, 3″ horizontal break, 12″ drop, 94.2 mphFF94 mphSlider: 23% usage, 1″ horizontal break, 35″ drop, 86.3 mphSL86 mphChangeup: 19% usage, 8″ horizontal break, 34″ drop, 87.5 mphCH87 mphSweeper: 13% usage, 5″ horizontal break, 41″ drop, 80.2 mphST80 mphCurveball: 7% usage, 7″ horizontal break, 56″ drop, 80.8 mphCU81 mphSinker: 3% usage, 7″ horizontal break, 20″ drop, 93.6 mphSI94 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
SL 37.0% 353 108 qualified
FB 33.2% 317 108 qualified
CH 19.8% 189 106 limited sample
CB 7.3% 70 104 limited sample
SI 2.6% 25 108 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' 2"
Weight197 lb
Debut2021-09-05
Live layer

Delta / regression

ERA Δ--
K% Δ--

positive regression

Regression watch

Unlucky so far. Better days ahead.

2.8σ gap
wOBA-against (actual)0.391
xwOBA-against (deserved)0.309

Junk’s wOBA-against sits at 0.391, but the quality of contact underneath says it should be 0.309 — a gap of 0.083, 2.8 standard deviations from the MLB norm over 68 IP. The results have been worse than the process deserves; as the sample grows, expect the numbers to climb back toward the underlying level.

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching132026-07-09Four-Seam Fastball played up through FF/SL tunnel quality
Projection links / recent games

Available detail

2026-05-20 vs ATL8 ER / 3 K5.0 IP
2026-04-17 vs MIL3 ER / 3 K5.1 IP
2026-04-11 @ DET4 ER / 4 K5.0 IP
2026-04-06 vs CIN2 ER / 3 K7.1 IP
2026-03-31 vs CWS2 ER / 5 K4.1 IP