Players · R · Pitcher · 2026

Michael Rucker

Age: 32
B/T: R/R
Height: 6' 1"
Weight: 195 lb
Number: #38

Born: April 27, 1994 in Columbus, MS, United States
MLB debut: July 30, 2021
Drafted: 2016, round 11
College: Brigham Young
High school: Auburn Riverside

dbWAR: .5
IP: 42.0
ERA: 5.79
FIP: 4.01
K/9: 10.1
FIP−: 96

Michael Rucker is a relief pitcher for the Seattle Mariners. In 2026 he struck out 47 batters over 42.0 innings across 36 appearances, going 1-4. His ERA of 5.79 is 38.5% higher than the league average of 4.18 — the second worst on his team, and 470th of 538 among MLB pitchers with 20+ innings. Stripping out defence, his 4.01 FIP suggests he pitched better than his ERA shows. He missed bats on 24.9% of swings (11.6% of every pitch he threw), walked 8.9% of the batters he faced and struck out 26.3%. His 0.3 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, 2026.

FIP4.01

K/910.1

WHIP1.31

WAR.3

WAR by season

Pitching

Standard and advanced, by season.


2026	SEA	36	42.0	1	4	0	39	27	47	16	5.79	4.01	1.31	10.1	3.4	138	96	0.3
2023	CHC	35	40.1	2	1	0	39	22	40	19	4.91	4.84	1.44	8.9	4.2	113	112	0.0
2022	CHC	41	54.2	3	1	0	50	24	50	20	3.95	4.28	1.28	8.2	3.3	100	108	0.1
2021	CHC	20	28.1	0	0	1	32	22	30	11	6.99	4.72	1.52	9.5	3.5	164	111	0.0

Batting

Standard and advanced, by season.

																					Trend
2021	CHC	1	1	0	0	0	0	0	1	.000	.000	.000	.000	—	0.0%	100.0%	.000	-0.3	-118	-0.0	—

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	96	83	26	6	11	22	.313	.400	.578	.423	22.9%
vs RHB	83	77	13	0	5	25	.169	.229	.182	.197	30.1%

Pitch sequencing

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

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Four-seamCurveballCutterSinkerSliderChangeup

Select a count to see exactly what Michael Rucker throws in it.

Pitch arsenal

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

Season


Four-Seam Fastball	33.1%	240	96.2	2,336	49.6%	21.6%	49	.327	1.002
Curveball	30.7%	222	82.3	2,787	50.5%	34.9%	55	.164	.429
Cutter	20.9%	151	89.8	2,562	46.4%	17.6%	33	.303	.894
Sinker	12.6%	91	95.7	2,270	51.6%	15.6%	20	.150	.411
Slider	2.2%	16	86.5	2,703	37.5%	50.0%	2	—	—

Michael Rucker'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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Michael Rucker

Similar players

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

Brandon EisertCWS

ERA: 5.52
FIP: 3.67
SO: 49
WAR: 0.5

Very close

Caleb KilianSF

ERA: 4.91
FIP: 3.84
SO: 56
WAR: 0.5

Very close

Travis AdamsMIN

ERA: 4.74
FIP: 4.15
SO: 58
WAR: 0.3

Very close

Jake BirdNYY

ERA: 5.35
FIP: 4.40
SO: 41
WAR: 0.2

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.