Mithrandir Metrics
Player Tampa Bay Rays Refreshed Sep 27 06:00 AM ET
Player profile / Tampa Bay Rays

Ian Seymour

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

Cards
13
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
2026974.2147162132.21581.13
2 Seasons13104.0366212189.22221.14
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.

2026-09-27
75
Pitching
percentile
Pitching9 metrics
60
Arsenal6 metrics
50
Rolling projection

Preseason / current pace / Bayesian update

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

2026-09-27
ERA preseason4.87
ERA current pace4.22
ERA rolling p504.41
Observed weight70%
ERA
3.18 3.76 4.41 5.06 5.65
FIP
3.15 3.57 4.03 4.49 4.90
K%
25.1% 26.2% 27.4% 28.5% 29.6%
BB%
5.6% 6.2% 6.8% 7.5% 8.0%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-27
Pitching · percentile strip
WHIP1.13
82
ERA4.22
45
BB%6.5%
84 +18 vs proj
K%28.5%
88 +30 vs proj
xwOBA allowed0.292
76 +17 vs proj
Barrel allowed9.7%
17 -28 vs proj
Fastball velo90.9
7
Hard-hit allowed36.7%
64
Whiff%26.2%
76 +21 vs proj
Mithrandir+

Stuff+ and arsenal context

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

2026-09-27
Changeup Stuff+103
56
Fastball Stuff+101
42
Mithrandir Stuff+102
50
Slider Stuff+104
68
Cutter Stuff+100
41
Sinker Stuff+102
46
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 0.292 2026-09-13: 0.2892026-09-14: 0.2892026-09-18: 0.2892026-09-19: 0.2952026-09-20: 0.2952026-09-21: 0.2952026-09-22: 0.2952026-09-23: 0.2952026-09-24: 0.2952026-09-25: 0.2952026-09-26: 0.2922026-09-27: 0.292 2026-09-13 2026-09-27 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 29%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: 55%55%Hard hit allowed: 37%37% 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: 28.9%4-Seam Fastball: 27.5%Sweeper: 19.3%Sinker: 16.2%Slider: 6.5%Cutter: 1.0% CH29% · 83 mphprimary pitch CH 29%FF 28%ST 19%SI 16%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: 29% usage, 8″ horizontal break, 31″ drop, 83.5 mphCH83 mph4-Seam Fastball: 28% usage, 4″ horizontal break, 16″ drop, 91.4 mphFF91 mphSweeper: 19% usage, 3″ horizontal break, 32″ drop, 81.6 mphST82 mphSinker: 16% usage, 1″ horizontal break, 24″ drop, 89.9 mphSI90 mphSlider: 6% usage, 0″ horizontal break, 27″ 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 29.8% 280 103 qualified
SL 24.6% 231 104 qualified
FB 23.6% 222 101 qualified
SI 20.3% 191 102 limited sample
FC 1.3% 12 100 limited sample
CB 0.4% 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+0.23
K% Δ+0.053

positive regression

Regression watch

Unlucky so far. Better days ahead.

1.4σ gap
wOBA-against (actual)0.327
xwOBA-against (deserved)0.292

Seymour’s wOBA-against sits at 0.327, but the quality of contact underneath says it should be 0.292 — a gap of 0.035, 1.4 standard deviations from the MLB norm over 135 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
Pitching132026-09-24Four-Seam Fastball played up through FF/CH 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