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

Mark Leiter Jr.

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

Cards
0
Modules
0
Live Δ
yes
Club Athletics 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 preseason4.25
ERA current pace5.96
ERA rolling p504.83
Observed weight34%
ERA
2.98 3.86 4.83 5.80 6.67
FIP
2.29 2.84 3.46 4.07 4.62
K%
21.2% 23.5% 26.1% 28.7% 31.0%
BB%
5.8% 7.0% 8.4% 9.8% 11.0%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-06-01
Pitching · percentile strip
BB%6.6%
79 +31 vs proj
Barrel allowed4.8%
84 +39 vs proj
Fastball velo92.2
20
Hard-hit allowed33.3%
83
K%23.8%
58
Whiff%24.0%
59 -24 vs proj
xwOBA allowed0.337
30 -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+101
47
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 Leiter Jr.., Mark · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.314 2026-05-17: 0.3432026-05-19: 0.3432026-05-21: 0.3432026-05-23: 0.3392026-05-24: 0.3382026-05-25: 0.3412026-05-26: 0.3412026-05-28: 0.3412026-05-29: 0.3412026-05-30: 0.3412026-05-31: 0.3382026-06-01: 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 31%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 Leiter Jr.., Mark · Aggregate zone metrics; not pitch-by-pitch locations Edge: 36%36%Zone: 47%47%Whiff: 24%24%Called strike: 18%18%First pitch strike: 50%50%Hard hit allowed: 33%33% 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 Leiter Jr.., Mark · 2026 arsenal snapshot Split-Finger: 30.5%Sinker: 27.2%Curveball: 17.7%4-Seam Fastball: 15.3%Cutter: 8.2%Slider: 1.1% MIX FS 31%SI 27%CU 18%FF 15%FC 8%SL 1% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Leiter Jr.., Mark · 2026 arsenal snapshot FS: HB -0.2, IVB 3.0FSSI: HB 0.0, IVB 1.7SICU: HB 0.2, IVB 5.6CUFF: HB 0.1, IVB 1.3FFFC: HB -0.0, IVB 2.0FCSL: HB -0.2, IVB 3.5SL horizontal break IVB MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
SI 38.1% 99 106 limited sample
CB 25.4% 66 103 limited sample
FB 22.3% 58 91 limited sample
FC 12.3% 32 99 limited sample
SL 1.9% 5 113 limited sample
Method note

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

Reference layer

Current snapshot

Age35
Height6' 0"
Weight210 lb
Debut2017-04-28
Live layer

Delta / regression

ERA Δ+1.82
K% Δ-0.014
Mithrandir coverage

Module shelf

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

Available detail

Pitcher Projections 202625.2% K | 4.14 ERAProjection
2026-05-20 @ LAA0 ER / 1 K1.0 IP
2026-04-20 @ SEA0 ER / 1 K1.0 IP
2026-04-15 vs TEX3 ER / 1 K0.2 IP
2026-04-14 vs TEX0 ER / 2 K1.0 IP
2026-04-11 @ NYM0 ER / 3 K1.0 IP