Players · A · Pitcher · 2026 regular season

Spencer Arrighetti

Age: 26
B/T: R/R
Height: 6' 2"
Weight: 186 lb
Number: #45

Born: January 2, 2000 in Albuquerque, NM, United States
MLB debut: April 10, 2024
Drafted: 2021, round 6
College: Louisiana-Lafayette
High school: Cinco Ranch

Compare with…vs Lance McCullers Jr.vs Brandon Sproat vs Brandon Williamson

dbWAR: 1.0
IP: 110.2
ERA: 4.96
FIP: 5.44
K/9: 8.6
FIP−: 130

Spencer Arrighetti is a starting pitcher for the Houston Astros. In 2026 he struck out 106 batters over 110.2 innings across 24 appearances, 19 of them starts, going 9-9. His ERA of 4.96 was 18.6% higher than the league average of 4.18 — 12th of 20 on his team, and 403rd of 539 among MLB pitchers with 20+ innings. Stripping out defence, his 5.44 FIP suggests that his ERA had some help behind him. He missed bats on 25.5% of swings (10.7% of every pitch he threw), walked 13.0% of the batters he faced and struck out 21.5%. His -0.5 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 regular season.

FIP5.44

K/98.6

WHIP1.38

WAR-.5

WAR by season

Pitching Regular season

Standard and advanced, by season. Regular-season games only.


2026	HOU/TOR	24	19	110.2	9	9	89	61	106	64	4.96	5.44	1.38	8.6	5.2	119	130	-0.5
2025	HOU	7	7	35.1	1	5	30	21	31	20	5.35	5.54	1.42	7.9	5.1	129	133	-0.1
2024	HOU	29	28	145.0	7	13	139	73	171	65	4.53	4.18	1.41	10.6	4.0	111	102	1.6

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	289	232	52	12	45	62	.224	.368	.414	.355	21.5%
vs RHB	203	174	37	6	19	44	.213	.308	.351	.300	21.7%

Pitch sequencing

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

ShowBatter

CurveballFour-seamSweeperSinkerChangeupCutterSlider

Select a count to see exactly what Spencer Arrighetti throws in it.

Pitch arsenal

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

Season


Curveball	34.2%	665	76.5	2,825	42.6%	40.3%	140	.157	.513
Four-Seam Fastball	28.1%	546	92.4	2,330	49.5%	18.9%	101	.267	.891
Sweeper	11.6%	225	79.7	2,763	43.1%	26.0%	52	.212	.674
Sinker	10.5%	204	92.1	2,283	42.6%	9.8%	40	.350	1.166
Changeup	8.0%	155	84.2	1,480	31.6%	25.4%	31	.129	.390
Cutter	6.7%	131	87.8	2,330	46.6%	14.1%	40	.250	.933
Slider	0.8%	16	82.2	2,672	37.5%	25.0%	3	—	—

Spencer Arrighetti'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.

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Similar players

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

JR RitchieATL

ERA: 4.91
FIP: 5.56
SO: 68
WAR: -0.4

Very close

Brandon SproatMIL

ERA: 5.57
FIP: 5.22
SO: 101
WAR: -0.0

Very close

Jacob LopezATH

ERA: 5.47
FIP: 5.22
SO: 112
WAR: 0.3

Jake IrvinWSH

ERA: 5.48
FIP: 5.08
SO: 110
WAR: 0.3

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.