The 2023 roster for the Mariners included Ty Adcock, Eduard Bazardo, Prelander Berroa, Matt Brash and JB Bukauskas.

	NO.	NAME	POS	HEIGHT	WEIGHT	DOB	AGE	BIRTHPLACE
1	70	Ty Adcock T. Adcock	P	6'0"	213	2/7/1997	26	Oxford, NC
2	41	Eduard Bazardo E. Bazardo	P	6'0"	190	9/1/1995	27	Maracay, Venezuela
3	52	Prelander Berroa P. Berroa	P	5'11"	170	4/18/2000	23	Santo Domingo, Dominican Republic
4	47	Matt Brash M. Brash	P	6'1"	173	5/12/1998	25	Kingston, Canada
5		JB Bukauskas	P	6'0"	196	10/11/1996	26	Ashburn, VA
6	76	José Caballero J. Caballero	2B	5'9"	185	8/30/1996	26	Panama City, Panama
7	49	Isaiah Campbell I. Campbell	P	6'4"	230	8/15/1997	25	Angra de Heroismo, Portugal
8	8	Dominic Canzone D. Canzone	LF	6'1"	190	8/16/1997	25	Cleveland, OH
9	63	Diego Castillo D. Castillo	P	6'3"	250	1/18/1994	29	Cabrera, Dominican Republic
10	58	Luis Castillo L. Castillo	P	6'2"	200	12/12/1992	30	Bani, Dominican Republic
11		Chris Clarke C. Clarke	P	6'7"	212	5/13/1998	25	Westlake Village, CA
12		Jonatan Clase J. Clase	CF	5'8"	150	5/23/2002	21	Santo Domingo, Dominican Republic
13	3	J.P. Crawford	SS	6'2"	202	1/11/1995	28	Long Beach, CA
14	67	Matt Festa M. Festa	P	6'1"	195	3/11/1993	30	Staten Island, NY
15	77	Chris Flexen C. Flexen	P	6'3"	219	7/1/1994	29	Newark, CA
16	20	Mike Ford M. Ford	1B	6'0"	225	7/4/1992	30	Belle Mead, NJ
17	23	Ty France T. France	1B	5'11"	215	7/13/1994	28	Downey, CA
18	36	Logan Gilbert L. Gilbert	P	6'6"	215	5/5/1997	26	Winter Park, FL
19	7	Marco Gonzales M. Gonzales	P	6'1"	205	2/16/1992	31	Fort Collins, CO
20	30	Trevor Gott T. Gott	P	5'11"	185	8/26/1992	30	Lexington, KY
21	0	Sam Haggerty S. Haggerty	2B	5'11"	175	5/26/1994	29	Phoenix, AZ
22	62	Emerson Hancock E. Hancock	P	6'4"	213	5/31/1999	24	Cairo, GA
23	35	Teoscar Hernández T. Hernández	RF	6'2"	215	10/15/1992	30	Cotui, Dominican Republic
24		Cooper Hummel C. Hummel	DH	5'10"	198	11/28/1994	28	Portland, OR
25	10	Jarred Kelenic J. Kelenic	LF	6'1"	206	7/16/1999	23	Waukesha, WI