Mithrandir Metrics
Player Boston Red Sox Refreshed Sep 28 06:00 AM ET
Player profile / Boston Red Sox

Tanner Houck

P · Bats/Throws R/R · 6' 5", 226 lb · Age 30

Cards
1
Modules
1
Live Δ
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Club Boston Red Sox Position P Roster Current MLB team Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
20249103.1230300178.21541.14
2025038.0499043.2321.69
2026019.001103.011.33
7 Seasons24334.00114819477.14501.24
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.

2026-09-28
75
Pitching
percentile
Arsenal4 metrics
75
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-28
ERA preseason4.09
ERA current pace9.00
ERA rolling p504.35
Observed weight5%
ERA
2.96 3.62 4.35 5.07 5.73
FIP
3.44 3.86 4.33 4.80 5.23
K%
13.9% 16.5% 19.4% 22.3% 24.9%
BB%
5.4% 6.4% 7.4% 8.5% 9.4%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-28
Mithrandir+

Stuff+ and arsenal context

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

2026-09-28
Fastball Stuff+99
30
Mithrandir Stuff+107
92
Sinker Stuff+107
85
Slider Stuff+108
91
Rolling form chart

xwOBA allowed snapshot line

Live snapshot series; true 50/100 PA windows require PA-level logs

0 snapshots
No chart yet

No Live State xwOBA snapshots are available for this player.

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.

4Pitches 2025Season 40%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 Houck, Tanner · Aggregate zone metrics; not pitch-by-pitch locations Edge: 42%42%Zone: 50%50%Whiff: 4%4%Called strike: 20%20%First pitch strike: 31%31%Hard hit allowed: 50%50% Dashed border = aggregate mixed-batter zone proxy MITHRANDIR · CHARTS
Pitch arsenal

Usage mix, movement map, and Stuff+ composition

2025 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 →

2025
Mithrandir Metrics PITCH ARSENAL DONUT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Houck, Tanner · 2025 arsenal snapshot Sinker: 39.8%Sweeper: 35.4%Split-Finger: 19.0%4-Seam Fastball: 5.9% SI40% · 94 mphprimary pitch SI 40%ST 35%FS 19%FF 6% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Houck, Tanner · 2025 arsenal snapshot 12″24″36″48″ Sinker: 40% usage, 3″ horizontal break, 30″ drop, 94.5 mphSI94 mphSweeper: 35% usage, 2″ horizontal break, 42″ drop, 83.5 mphST84 mphSplit-Finger: 19% usage, 9″ horizontal break, 37″ drop, 89.4 mphFS89 mph4-Seam Fastball: 6% usage, 5″ horizontal break, 21″ drop, 95.0 mphFF95 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
SI 38.5% 15 107 limited sample
SL 33.3% 13 108 limited sample
FB 28.2% 11 99 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' 5"
Weight226 lb
Debut2020-09-15
Live layer

Delta / regression

No Live State delta is available for this profile yet.

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Pitching12026-09-27Sinker played up through SI/ST tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202620.8% K | 4.73 ERAProjection