Mithrandir Metrics
Player Tampa Bay Rays Refreshed Sep 2 06:00 AM ET
Player profile / Tampa Bay Rays

Ian Seymour

P · Bats/Throws L/L · 6' 0", 215 lb · Age 27

Cards
9
Modules
1
Live Δ
yes
Club Tampa Bay Rays Position P Roster Current MLB team Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2025433.63195057.0641.18
2026964.2142122113.11381.14
2 Seasons1394.0261172170.12021.15
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.

2026-09-02
75
Pitching
percentile
Pitching9 metrics
62
Arsenal6 metrics
52
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-02
ERA preseason4.87
ERA current pace4.17
ERA rolling p504.40
Observed weight67%
ERA
3.19 3.76 4.40 5.04 5.61
FIP
3.05 3.45 3.90 4.35 4.76
K%
25.3% 26.4% 27.6% 28.9% 30.0%
BB%
5.7% 6.3% 7.0% 7.7% 8.3%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-02
Pitching · percentile strip
WHIP1.14
81
ERA4.17
46
BB%6.8%
79
K%29.1%
90 +32 vs proj
xwOBA allowed0.288
77 +18 vs proj
Barrel allowed9.2%
24 -22 vs proj
Fastball velo90.9
6
Hard-hit allowed35.1%
75
Whiff%26.2%
77 +23 vs proj
Mithrandir+

Stuff+ and arsenal context

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

2026-09-02
Changeup Stuff+103
60
Mithrandir Stuff+102
49
Cutter Stuff+101
44
Fastball Stuff+99
29
Sinker Stuff+102
55
Slider 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 Seymour, Ian · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.313 0.288 2026-08-22: 0.2972026-08-23: 0.2972026-08-24: 0.2972026-08-25: 0.2982026-08-26: 0.2982026-08-27: 0.2942026-08-28: 0.2942026-08-29: 0.2942026-08-30: 0.2942026-08-31: 0.2942026-09-01: 0.2882026-09-02: 0.288 2026-08-22 2026-09-02 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.

7Pitches 2026Season 30%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 Seymour, Ian · Aggregate zone metrics; not pitch-by-pitch locations Edge: 37%37%Zone: 50%50%Whiff: 26%26%Called strike: 17%17%First pitch strike: 54%54%Hard hit allowed: 35%35% 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 Seymour, Ian · 2026 arsenal snapshot Changeup: 29.6%4-Seam Fastball: 27.5%Sweeper: 20.4%Sinker: 14.8%Slider: 5.8%Cutter: 1.1% CH30% · 83 mphprimary pitch CH 30%FF 28%ST 20%SI 15%SL 6%FC 1% MITHRANDIR · CHARTS
Mithrandir Metrics PITCH MOVEMENT Parameterized Mithrandir chart rendered as SVG for templates and exports. Pitch Arsenal Seymour, Ian · 2026 arsenal snapshot 18″36″54″72″ Changeup: 30% usage, 8″ horizontal break, 31″ drop, 83.4 mphCH83 mph4-Seam Fastball: 28% usage, 4″ horizontal break, 16″ drop, 91.4 mphFF91 mphSweeper: 20% usage, 3″ horizontal break, 32″ drop, 81.6 mphST82 mphSinker: 15% usage, 3″ horizontal break, 24″ drop, 90.0 mphSI90 mphSlider: 6% usage, 0″ horizontal break, 28″ drop, 83.2 mphSL83 mphCutter: 1% usage, 2″ horizontal break, 26″ drop, 87.2 mphFC87 mphCurveball: 1% usage, 9″ horizontal break, 65″ drop, 72.7 mphCU73 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
CH 31.6% 221 103 qualified
SL 25.0% 175 105 limited sample
FB 22.6% 158 99 limited sample
SI 18.5% 129 102 limited sample
FC 1.7% 12 101 limited sample
CB 0.6% 4 104 limited sample
Method note

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

Reference layer

Current snapshot

Age27
Height6' 0"
Weight215 lb
Debut2025-06-09
Live layer

Delta / regression

ERA Δ+0.18
K% Δ+0.058

positive regression

Regression watch

Unlucky so far. Better days ahead.

1.5σ gap
wOBA-against (actual)0.327
xwOBA-against (deserved)0.288

Seymour’s wOBA-against sits at 0.327, but the quality of contact underneath says it should be 0.288 — a gap of 0.039, 1.5 standard deviations from the MLB norm over 116 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
Pitching92026-08-31Sinker played up through FF/SL tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202623.1% K | 3.99 ERAProjection
2026-08-15 vs BAL3 ER / 9 K6.0 IP
2026-05-20 vs BAL0 ER / 0 K1.0 IP
2026-04-15 @ CWS3 ER / 1 K1.0 IP
2026-04-11 vs NYY0 ER / 3 K1.2 IP
2026-04-06 vs CHC1 ER / 1 K1.1 IP