Players · S · Pitcher · 2026

Mitch Spence

Kansas City Royals American League Central

Age: 28
B/T: R/R
Height: 6' 1"
Weight: 185 lb
Number: #54

Born: May 6, 1998 in Kirkland, WA, United States
MLB debut: March 29, 2024
Drafted: 2019, round 10
College: South Carolina-Aiken

dbWAR: .7
IP: 9.1
ERA: 21.21
FIP: 8.89
K/9: 5.8
FIP−: 213

Mitch Spence is a relief pitcher for the Kansas City Royals. In 2026 he struck out 6 batters over 9.1 innings across 3 appearances, going 0-2. His ERA of 21.21 is 407.8% higher than the league average of 4.18. Stripping out defence, his 8.89 FIP suggests he pitched better than his ERA shows. He missed bats on 20.0% of swings (9.0% of every pitch he threw), walked 16.1% of the batters he faced and struck out 10.7%. His -0.4 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.

FIP8.89

K/95.8

WHIP3.00

WAR-.4

WAR by season

Pitching

Standard and advanced, by season.


2026	KC	3	1	9.1	0	2	0	19	22	6	9	21.21	8.89	3.00	5.8	8.7	508	213	-0.4
2025	ATH	32	8	84.2	3	6	1	96	48	66	26	5.10	5.10	1.44	7.0	2.8	123	123	-0.2
2024	OAK	35	24	151.1	8	10	0	165	77	126	44	4.58	4.21	1.38	7.5	2.6	112	103	1.3

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	36	27	13	2	9	4	.481	.611	.852	.608	11.1%
vs RHB	20	19	6	1	0	2	.316	.300	.526	.343	10.0%

Pitch sequencing

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

ShowBatter

CutterSliderSinkerCurveballChangeup

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Pitch arsenal

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

Season


Cutter	38.0%	76	91.9	2,602	46.1%	16.7%	20	.350	.940
Slider	20.0%	40	84.5	2,702	42.5%	30.8%	7	—	—
Sinker	17.0%	34	92.5	2,356	32.4%	0.0%	9	—	—
Curveball	16.5%	33	81.6	2,755	36.4%	43.8%	8	—	—
Changeup	8.5%	17	88.0	1,930	17.6%	0.0%	2	—	—

Mitch Spence'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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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.