SEA · P

Seranthony Domínguez

Age 31 B/T R/R 6′1″, 225 lb Dominican Republic MLB debut 2018

40-man

Seattle’s roster as it stands on the 40-man, off the 26-man (call-up depth)
Trade read Unlikely to be traded: Signed in Jan 2026 (2 yr, $20M (2026-27), 2028 mutual option): clubs rarely move a player they just committed to.

Keystone Stuff 111 86th pct

2026 fWAR 0.0

Projected 2027 WAR 0.2 Keystone Marcel+ at 67 IP

Pitching · 2026 percentiles

vs. MLB pitchers with 500+ pitches · 1,111 pitches

Keystone Stuff 111

Keystone Location 83

Keystone Pitching 97

Run value (xRV) +0.24

Strikeout % 25.0%

Walk % 11.9%

Whiff % 27.9%

Chase % 28.2%

Fastball velo 97.4

Extension 6.4 ft

62.0 IP3.63 ERA4.54 FIP 30° arm12 SV

Arsenal & Pitch Lab

Movement normalized to arm side · Keystone Stuff by pitch

RHP · arm angle 29° · how to read

Pitch	Use	Velo	IVB	HB	Stuff	Loc	Whiff	xRV/100
Four-seam43% use	43%	97.3	14.2	+5.3	105	97	24%	+0.45
Sweeper28% use	28%	85.1	4.4	−10.4	118	83	31%	+0.85
Sinker16% use	16%	97.6	10.0	+15.1	100	93	13%	−2.14
Splitter11% use	11%	85.9	2.5	+9.4	106	76	55%	+1.46

No mix change or new pitch clears its bar. The arsenal is efficient for its shapes.

Most similar pitchers

Pitches like Domínguez: same hand, shape, slot and mix

Similarity	Player	Stuff	’26 WAR	’27 proj	2027
55	Luis Medina ATH · ’99	103	0.9	0.6	Arb
47	Anthony Nunez BAL · ’01	109	0.6	0.6	—
44	Chase Silseth TEX · ’00	98	0.4	0.3	Pre-arb
43	Ryan Zeferjahn CHC · ’98	118	0.5	0.2	Pre-arb
43	Jonathan Bowlan PHI · ’96	114	0.8	0.5	Pre-arb

Same-handed pitchers nearest on fastball velocity and shape, arm angle, extension, pitch mix, secondary shapes, Stuff, whiff rate and workload. 2026 regulars only.

Pitch locations · 2026

Where each pitch finishes, by batter side

Four-seam 39%

51% zone

Sweeper 35%

36% zone

Sinker 25%

45% zone

Where each pitch finishes, catcher’s view. The bar marks the batter’s side; the box is an average strike zone. Pitches with 40+ thrown to this side.

Contract & projection

Club control (RosterResource) · Keystone projected WAR

2027 0.2 WAR Guaranteed $10.5M

2028 0.1 WAR Mutual option $12.0M

2029 −0.1 WAR Free agent

2030 −0.2 WAR Free agent

Contract Studio →

ABS challenges · 2026

Baseball Savant

As pitcher 0% 0/1 won · 0.0 runs