Players · S · Pitcher · 2026

Ian Seymour

Age: 28
B/T: L/L
Height: 6' 0"
Weight: 215 lb
Number: #61

Born: December 13, 1998 in Madison, CT, United States
MLB debut: June 9, 2025
Drafted: 2020, round 2
College: Virginia Tech

dbWAR: 2.3
IP: 132.1
ERA: 4.22
FIP: 4.10
K/9: 10.7
FIP−: 98

Ian Seymour is a relief pitcher for the Tampa Bay Rays. In 2026 he struck out 158 batters over 132.1 innings across 46 appearances, going 9-7. His ERA of 4.22 is 0.9% higher than the league average of 4.18 — 10th of 16 on his team, and 299th of 538 among MLB pitchers with 20+ innings. Stripping out defence, his 4.10 FIP suggests the ERA was no fluke. He missed bats on 29.4% of swings (15.2% of every pitch he threw), walked 6.5% of the batters he faced and struck out 28.7%. His 1.2 dbWAR is built from that FIP rather than runs allowed, so it credits him for what he controls and not for the defence behind him.

League context

Percentile among qualified pitchers, 2026.

FIP4.10

K/910.7

WHIP1.13

WAR1.2

WAR by season

Pitching

Standard and advanced, by season.

																				Trend
2026	TB	46	16	132.1	9	7	2	114	62	158	36	4.22	4.10	1.13	10.7	2.4	101	98	1.2
2025	TB	19	5	57.0	4	3	0	48	23	64	19	3.63	3.19	1.18	10.1	3.0	87	77	1.1

Platoon splits

How left- and right-handed hitters fare against him.

Season

Opponent batting by the side the hitter bats from, 2026. Counted from play-by-play, so totals can differ from the box-score season line by a plate appearance or two.
Split	PA	AB	H	HR	BB	SO	AVG	OBP	SLG	wOBA	K%
vs LHB	186	175	43	11	6	52	.246	.285	.509	.336	28.0%
vs RHB	364	327	71	14	30	106	.217	.283	.401	.297	29.1%

Pitch sequencing

What Ian Seymour throws in each count, and what he follows each pitch with. Select any cell for the breakdown.

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ChangeupFour-seamSweeperSinkerSliderCurveballCutter

Select a count to see exactly what Ian Seymour throws in it.

Pitch arsenal

What he throws, how hard, how often it misses, and what hitters do with it.

Season


Changeup	28.8%	611	83.4	1,614	44.8%	38.4%	179	.190	.578
Four-Seam Fastball	27.5%	583	91.4	2,162	54.0%	26.0%	136	.206	.673
Sweeper	19.6%	416	81.6	2,175	58.2%	33.2%	85	.212	.781
Sinker	16.4%	347	89.9	1,959	52.4%	11.4%	68	.309	.903
Slider	6.6%	139	83.2	2,115	52.5%	28.2%	32	.344	.958
Curveball	0.7%	14	72.7	1,941	28.6%	50.0%	1	—	—
Cutter	0.5%	11	87.1	2,107	54.5%	16.7%	2	—	—

Ian Seymour's arsenal by usage. Velocity is average release speed in mph, spin in rpm, and whiff rate is misses per swing — the cleanest single measure of whether a pitch beats hitters. BAA and OPS are what hitters did against each pitch, credited to the one that ended the plate appearance, and are left blank under 15 at-bats.

Head to head

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Similar players

Nearest 2026 seasons by command, run prevention and role, on rate statistics rather than totals.

Will DionWSH

ERA: 3.78
FIP: 4.13
SO: 53
WAR: 0.4

Evan PhillipsLAD

ERA: 3.38
FIP: 4.19
SO: 30
WAR: 0.1

Luis GastelumSTL

ERA: 4.42
FIP: 3.97
SO: 44
WAR: 0.3

Emilio PagánCIN

ERA: 3.38
FIP: 4.18
SO: 45
WAR: 0.2

How these are computed

wOBA uses linear weights measured from this season's own play-by-play rather than published constants, and wRC+ is park-adjusted against that same league. dbWAR is our own open implementation — not fWAR or bWAR — and the full derivation, including its simplifications, is on the methodology page.