Players · M · Pitcher · 2024

Alec Marsh

Kansas City Royals American League Central

Age: 26
B/T: R/R
Height: 6' 2"
Weight: 220 lb
Number: #48

Born: May 14, 1998 in Milwaukee, WI, United States
MLB debut: June 30, 2023
Drafted: 2019, round CB-B
College: Arizona State
Salary, 2024: $744,750

dbWAR: .8
IP: 129.0
ERA: 4.53
FIP: 4.34
K/9: 8.6
FIP−: 106

Alec Marsh was a starting pitcher for the Kansas City Royals. In 2024 he struck out 123 batters over 129.0 innings across 26 appearances, 25 of them starts, going 9-9. His ERA of 4.53 was 11.2% higher than the league average of 4.08 — 12th of 15 on his team, and 368th of 541 among MLB pitchers with 20+ innings. Stripping out defence, his 4.34 FIP suggests the ERA was no fluke. He missed bats on 23.5% of swings (11.2% of every pitch he threw), walked 7.1% of the batters he faced and struck out 22.4%. His 1.3 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, 2024.

FIP4.34

K/98.6

WHIP1.26

WAR1.3

WAR by season

Pitching

Standard and advanced, by season.

																				Trend
2024	KC	26	25	129.0	9	9	0	123	65	123	39	4.53	4.34	1.26	8.6	2.7	111	106	1.3
2023	KC	17	8	74.1	3	9	0	77	47	85	39	5.69	5.70	1.56	10.3	4.7	131	132	-0.4

Platoon splits

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

Season

Opponent batting by the side the hitter bats from, 2024. 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	309	279	70	9	18	61	.251	.317	.427	.325	19.7%
vs RHB	240	215	53	10	21	62	.247	.314	.442	.327	25.8%

Pitch sequencing

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

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Four-seamSliderCurveballSinkerChangeupSweeper

Select a count to see exactly what Alec Marsh throws in it.

Pitch arsenal

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

Season


Four-Seam Fastball	37.0%	799	94.2	2,498	50.3%	22.0%	153	.196	.666
Slider	17.9%	386	86.6	2,464	48.4%	29.4%	93	.290	.782
Curveball	16.4%	355	82.8	2,508	47.0%	27.4%	80	.263	.818
Sinker	13.8%	299	93.6	2,389	41.8%	10.6%	85	.329	.939
Changeup	10.0%	216	86.3	1,747	38.9%	17.7%	54	.204	.538
Sweeper	4.9%	106	86.1	2,477	50.0%	46.4%	30	.200	.683

Alec Marsh'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

Put Alec Marsh beside up to three others.

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Alec Marsh

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Similar players

Nearest 2024 seasons by command, run prevention and role, on rate statistics rather than totals.

Matt WaldronSD

ERA: 4.91
FIP: 4.26
SO: 133
WAR: 1.4

Very close

Kyle HarrisonSF

ERA: 4.56
FIP: 4.33
SO: 118
WAR: 1.1

Very close

Jake IrvinWSH

ERA: 4.41
FIP: 4.41
SO: 156
WAR: 1.5

Very close

Andrew HeaneyTEX

ERA: 4.28
FIP: 4.04
SO: 159
WAR: 1.8

Very close

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.