Mithrandir Metrics
Player Nashville Sounds Refreshed Sep 4 06:00 AM ET
Player profile / Nashville Sounds

Brandon Sproat

P · Bats/Throws R/R · 6' 3", 205 lb · Age 25

Cards
18
Modules
1
Live Δ
yes
Club Nashville Sounds Position P Roster Current MLB team Status Out / inactive
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2025024.7944020.2171.21
2026375.272119095.21001.42
2 Seasons395.1825230116.11171.38
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.

2026-09-04
32
Pitching
percentile
Pitching9 metrics
39
Arsenal7 metrics
33
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.

2026-09-04
Pitching · percentile strip
WHIP1.46
26
ERA5.27
21
BB%11.5%
22
K%24.2%
65
xwOBA allowed0.337
27
Barrel allowed8.4%
36
Fastball velo96.4
79
Hard-hit allowed42.4%
23
Whiff%23.0%
52
Mithrandir+

Stuff+ and arsenal context

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

2026-09-04
Cutter Stuff+103
66
Fastball Stuff+98
24
Mithrandir Stuff+101
36
Sinker Stuff+100
33
Changeup Stuff+98
22
Curveball Stuff+100
25
Slider Stuff+99
28
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 Sproat, Brandon · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.337 2026-08-24: 0.3362026-08-25: 0.3372026-08-26: 0.3372026-08-27: 0.3372026-08-28: 0.3372026-08-29: 0.3372026-08-30: 0.3372026-08-31: 0.3372026-09-01: 0.3372026-09-02: 0.3372026-09-03: 0.3372026-09-04: 0.337 2026-08-24 2026-09-04 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 26%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 Sproat, Brandon · Aggregate zone metrics; not pitch-by-pitch locations Edge: 36%36%Zone: 48%48%Whiff: 23%23%Called strike: 16%16%First pitch strike: 48%48%Hard hit allowed: 42%42% 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 Sproat, Brandon · 2026 arsenal snapshot Sinker: 26.2%4-Seam Fastball: 23.6%Cutter: 21.3%Sweeper: 10.4%Curveball: 10.1%Changeup: 8.4% SI26% · 96 mphprimary pitch SI 26%FF 24%FC 21%ST 10%CU 10%CH 8% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Sproat, Brandon · 2026 arsenal snapshot 15″30″45″60″ Sinker: 26% usage, 4″ horizontal break, 24″ drop, 96.1 mphSI96 mph4-Seam Fastball: 24% usage, 3″ horizontal break, 16″ drop, 96.8 mphFF97 mphCutter: 21% usage, 0″ horizontal break, 24″ drop, 93.0 mphFC93 mphSweeper: 10% usage, 10″ horizontal break, 33″ drop, 86.2 mphST86 mphCurveball: 10% usage, 7″ horizontal break, 51″ drop, 82.9 mphCU83 mphChangeup: 8% usage, 11″ horizontal break, 30″ drop, 91.4 mphCH91 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
FC 24.0% 239 103 qualified
SI 23.9% 238 100 qualified
FB 21.7% 216 98 qualified
CB 12.2% 121 100 limited sample
SL 9.8% 97 99 limited sample
CH 8.4% 83 98 limited sample
Method note

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

Reference layer

Current snapshot

Age25
Height6' 3"
Weight205 lb
Debut2025-09-07
Live layer

Delta / regression

ERA Δ--
K% Δ--

positive regression

Regression watch

Unlucky so far. Better days ahead.

1.1σ gap
wOBA-against (actual)0.367
xwOBA-against (deserved)0.337

Sproat’s wOBA-against sits at 0.367, but the quality of contact underneath says it should be 0.337 — a gap of 0.030, 1.1 standard deviations from the MLB norm over 96 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
Pitching182026-08-03Sinker played up through SI/ST tunnel quality
Projection links / recent games

Available detail

2026-04-11 vs WSH1 ER / 3 K3.2 IP
2026-04-04 @ KC4 ER / 4 K3.2 IP
2026-03-29 vs CWS7 ER / 3 K3.0 IP