Mithrandir Metrics
Player Tampa Bay Rays Refreshed Jul 17 06:00 AM ET
Player profile / Tampa Bay Rays

Ian Seymour

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

Cards
3
Modules
1
Live Δ
yes
Club Tampa Bay Rays Position P Roster Active Status Healthy / active roster
Traditional line

Season by season

3D Pitch Lab Projections
WLERAGGSSVIPSOWHIP
2025433.63195057.0641.18
2026624.59336264.2751.16
2 Seasons1054.1452112121.21391.17
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.

2026-07-17
62
Pitching
percentile
Pitching9 metrics
57
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.

2026-07-17
ERA preseason4.87
ERA current pace4.59
ERA rolling p504.72
Observed weight54%
ERA
3.57 4.11 4.72 5.32 5.87
FIP
3.14 3.52 3.95 4.38 4.76
K%
23.4% 24.7% 26.2% 27.7% 29.0%
BB%
6.5% 7.3% 8.2% 9.1% 9.9%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-07-17
Pitching · percentile strip
WHIP1.15
74
ERA4.59
34
BB%8.8%
48 -16 vs proj
K%27.5%
81 +26 vs proj
xwOBA allowed0.291
71
Barrel allowed8.0%
45
Fastball velo91.2
8
Hard-hit allowed35.2%
75
Whiff%26.6%
76 +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.

2026-07-17
Mithrandir Stuff+102
52
Changeup Stuff+104
62
Cutter Stuff+101
46
Fastball Stuff+101
38
Sinker Stuff+102
48
Slider Stuff+104
65
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 0.314 0.291 2026-07-06: 0.2852026-07-07: 0.2852026-07-08: 0.2852026-07-09: 0.2802026-07-10: 0.2802026-07-11: 0.2802026-07-12: 0.2802026-07-13: 0.2802026-07-14: 0.2912026-07-15: 0.2912026-07-16: 0.2912026-07-17: 0.291 2026-07-06 2026-07-17 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 31%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: 49%49%Whiff: 27%27%Called strike: 18%18%First pitch strike: 55%55%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: 31.0%4-Seam Fastball: 24.8%Sweeper: 24.0%Sinker: 13.7%Slider: 3.4%Cutter: 1.9% CH31% · 84 mphprimary pitch CH 31%FF 25%ST 24%SI 14%SL 3%FC 2% 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: 31% usage, 7″ horizontal break, 31″ drop, 83.6 mphCH84 mph4-Seam Fastball: 25% usage, 4″ horizontal break, 15″ drop, 91.7 mphFF92 mphSweeper: 24% usage, 3″ horizontal break, 33″ drop, 81.3 mphST81 mphSinker: 14% usage, 8″ horizontal break, 23″ drop, 90.3 mphSI90 mphSlider: 3% usage, 3″ horizontal break, 30″ drop, 82.7 mphSL83 mphCutter: 2% usage, 2″ horizontal break, 26″ drop, 87.2 mphFC87 mphCurveball: 1% usage, 9″ horizontal break, 64″ drop, 72.8 mphCU73 mph less drop ↑ more drop ↓ · horizontal break ↔ · dot size = usage · break incl. gravity MITHRANDIR · CHARTS
PitchUsagePitchesStuff+Status
CH 33.6% 174 104 limited sample
SL 24.9% 129 104 limited sample
FB 20.8% 108 101 limited sample
SI 17.6% 91 102 limited sample
FC 2.3% 12 101 limited sample
CB 0.8% 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+0.60
K% Δ+0.043

positive regression

Regression watch

Unlucky so far. Better days ahead.

1.1σ gap
wOBA-against (actual)0.324
xwOBA-against (deserved)0.291

Seymour’s wOBA-against sits at 0.324, but the quality of contact underneath says it should be 0.291 — a gap of 0.033, 1.1 standard deviations from the MLB norm over 68 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
Pitching32026-07-12Four-Seam Fastball played up through FF/CH tunnel quality
Projection links / recent games

Available detail

Pitcher Projections 202623.1% K | 3.99 ERAProjection
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
2026-04-01 @ MIL0 ER / 2 K2.0 IP