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

Mark Leiter Jr.

P · Bats/Throws R/R · 6' 0", 210 lb · Age 35

Cards
0
Modules
0
Live Δ
yes
Club Athletics Position P Roster Current MLB team Status IL-60
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024454.50600058.0861.33
2025674.84590248.1541.53
2026014.28360433.2381.31
7 Seasons16304.573061513386.04341.33
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.

2026-09-01
58
Pitching
percentile
Pitching9 metrics
64
Arsenal5 metrics
49
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.

2026-09-01
Pitching · percentile strip
WHIP1.37
42
ERA4.28
43
BB%6.9%
79
K%26.2%
79
xwOBA allowed0.316
46
Barrel allowed4.0%
93
Fastball velo92.2
17
Hard-hit allowed32.7%
88
Whiff%28.1%
86
Mithrandir+

Stuff+ and arsenal context

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

2026-09-01
Curveball Stuff+104
80
Cutter Stuff+100
31
Fastball Stuff+92
6
Mithrandir Stuff+102
49
Sinker Stuff+105
77
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 0.313 0.316 2026-08-21: 0.3162026-08-22: 0.3162026-08-23: 0.3162026-08-24: 0.3162026-08-25: 0.3162026-08-26: 0.3162026-08-27: 0.3162026-08-28: 0.3162026-08-29: 0.3162026-08-30: 0.3162026-08-31: 0.3162026-09-01: 0.316 2026-08-21 2026-09-01 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 32%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: 46%46%Whiff: 28%28%Called strike: 17%17%First pitch strike: 52%52%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.

Watch the pitches in 3D →

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: 31.5%Sinker: 27.2%Curveball: 19.2%4-Seam Fastball: 12.3%Cutter: 9.0%Slider: 0.8% FS32% · 84 mphprimary pitch FS 32%SI 27%CU 19%FF 12%FC 9%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 18″36″54″72″ Split-Finger: 32% usage, 2″ horizontal break, 36″ drop, 84.3 mphFS84 mphSinker: 27% usage, 1″ horizontal break, 21″ drop, 92.2 mphSI92 mphCurveball: 19% usage, 3″ horizontal break, 67″ drop, 73.9 mphCU74 mph4-Seam Fastball: 12% usage, 0″ horizontal break, 16″ drop, 92.3 mphFF92 mphCutter: 9% usage, 0″ horizontal break, 25″ drop, 89.6 mphFC90 mphSlider: 1% usage, 2″ horizontal break, 42″ drop, 82.5 mphSL83 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
SI 37.7% 104 105 limited sample
CB 26.4% 73 104 limited sample
FB 21.4% 59 92 limited sample
FC 12.7% 35 100 limited sample
SL 1.8% 5 112 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--
K% Δ--

positive regression

Regression watch

Unlucky so far. Better days ahead.

0.9σ gap
wOBA-against (actual)0.348
xwOBA-against (deserved)0.316

Jr.’s wOBA-against sits at 0.348, but the quality of contact underneath says it should be 0.316 — a gap of 0.032, 0.9 standard deviations from the MLB norm over 36 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
No Mithrandir card history is available for this player yet.
Projection links / recent games

Available detail

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