Mithrandir Metrics
Player Pittsburgh Pirates Refreshed Jul 18 06:00 AM ET
Player profile / Pittsburgh Pirates

Brandon Eisert

P · Bats/Throws L/L · 6' 2", 210 lb · Age 28

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

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2024004.053006.221.35
2025384.39723269.2741.44
2026215.65274028.2321.29
3 Seasons594.7110272105.01081.39
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.

2026-07-18
45
Pitching
percentile
Pitching9 metrics
41
Arsenal5 metrics
26
Rolling projection

Preseason / current pace / Bayesian update

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

2026-07-18
ERA preseason4.44
ERA current pace5.65
ERA rolling p504.88
Observed weight36%
ERA
3.31 4.05 4.88 5.70 6.45
FIP
3.64 4.20 4.83 5.45 6.02
K%
19.6% 21.5% 23.6% 25.7% 27.5%
BB%
5.6% 6.8% 8.1% 9.4% 10.5%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-07-18
Pitching · percentile strip
WHIP1.45
27
ERA5.65
15
BB%8.8%
47
K%25.7%
72
xwOBA allowed0.300
66
Barrel allowed10.1%
19 -20 vs proj
Fastball velo89.7
3
Hard-hit allowed40.4%
40
Whiff%27.8%
83
Mithrandir+

Stuff+ and arsenal context

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

2026-07-18
Changeup Stuff+95
13
Fastball Stuff+100
33
Mithrandir Stuff+98
21
Sinker Stuff+94
11
Slider Stuff+102
49
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 Eisert, Brandon · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.314 0.300 2026-07-07: 0.2782026-07-08: 0.2782026-07-09: 0.2882026-07-10: 0.2882026-07-11: 0.2882026-07-12: 0.2882026-07-13: 0.2942026-07-14: 0.3002026-07-15: 0.3002026-07-16: 0.3002026-07-17: 0.3002026-07-18: 0.300 2026-07-07 2026-07-18 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.

5Pitches 2026Season 37%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 Eisert, Brandon · Aggregate zone metrics; not pitch-by-pitch locations Edge: 40%40%Zone: 42%42%Whiff: 28%28%Called strike: 15%15%First pitch strike: 46%46%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.

Watch the pitches in 3D →

2026
Mithrandir Metrics PITCH ARSENAL DONUT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Eisert, Brandon · 2026 arsenal snapshot 4-Seam Fastball: 37.4%Slider: 32.6%Changeup: 22.2%Sinker: 7.3%Sweeper: 0.5% FF37% · 90 mphprimary pitch FF 37%SL 33%CH 22%SI 7%ST 1% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Eisert, Brandon · 2026 arsenal snapshot 12″24″36″48″ 4-Seam Fastball: 37% usage, 1″ horizontal break, 19″ drop, 89.9 mphFF90 mphSlider: 33% usage, 1″ horizontal break, 36″ drop, 84.0 mphSL84 mphChangeup: 22% usage, 9″ horizontal break, 34″ drop, 84.8 mphCH85 mphSinker: 7% usage, 14″ horizontal break, 25″ drop, 88.9 mphSI89 mphSweeper: 1% usage, 10″ horizontal break, 41″ drop, 78.9 mphST79 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FB 42.5% 114 100 limited sample
SL 27.2% 73 102 limited sample
CH 22.4% 60 95 limited sample
SI 7.8% 21 94 limited sample
Method note

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

Reference layer

Current snapshot

Age28
Height6' 2"
Weight210 lb
Debut2024-06-17
Live layer

Delta / regression

ERA Δ+1.43
K% Δ+0.023

positive regression

Regression watch

Unlucky so far. Better days ahead.

3.4σ gap
wOBA-against (actual)0.424
xwOBA-against (deserved)0.300

Eisert’s wOBA-against sits at 0.424, but the quality of contact underneath says it should be 0.300 — a gap of 0.125, 3.4 standard deviations from the MLB norm over 30 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

Pitcher Projections 202623.4% K | 4.22 ERAProjection
2026-05-20 @ SEA0 ER / 1 K1.0 IP
2026-04-14 vs TB2 ER / 1 K1.1 IP
2026-04-12 @ KC2 ER / 1 K1.0 IP