The 2017 roster for the Mariners included Ariel Miranda at pitcher, Mike Zunino at catcher, Yonder Alonso at first baseman, Robinson Cano at second baseman and Kyle Seager at third baseman.

	NAME	POS	HEIGHT	WEIGHT	DOB	AGE	BIRTHPLACE
1	Andrew Albers A. Albers	P	6'1"	200	10/6/1985	31	North Battleford, Canada
2	Yonder Alonso Y. Alonso	1B	6'1"	230	4/8/1987	30	Havana, Cuba
3	Dan Altavilla D. Altavilla	P	5'11"	200	9/8/1992	24	McKeesport, PA
4	Gordon Beckham G. Beckham	3B	6'0"	190	9/16/1986	30	Atlanta, GA
5	Christian Bergman C. Bergman	P	6'1"	195	5/4/1988	29	Glendale, CA
6	Robinson Cano R. Cano	2B	6'0"	210	10/22/1982	34	San Pedro de Macoris, Dominican Republic
7	Steve Cishek S. Cishek	P	6'6"	215	6/18/1986	31	Falmouth, MA
8	Tyler Cloyd T. Cloyd	P	6'3"	210	5/16/1987	30	Papillion, NE
9	Nelson Cruz N. Cruz	OF	6'2"	230	7/1/1980	37	Las Matas de Santa Cruz, Dominican Republic
10	Zac Curtis Z. Curtis	P	5'9"	190	7/4/1992	24	Panama City Beach, FL
11	Chase De Jong C. De Jong	P	6'4"	205	12/29/1993	23	Long Beach, CA
12	Edwin Díaz E. Díaz	P	6'3"	165	3/22/1994	23	Naguabo, Puerto Rico
13	Jarrod Dyson J. Dyson	OF	5'10"	165	8/15/1984	32	McComb, MS
14	Danny Espinosa D. Espinosa	2B	6'0"	205	4/25/1987	30	Santa Ana, CA
15	Casey Fien C. Fien	P	6'2"	210	10/21/1983	33	Santa Rosa, CA
16	Mike Freeman M. Freeman	1B	6'0"	190	8/4/1987	29	Orlando, FL
17	Yovani Gallardo Y. Gallardo	P	6'2"	205	2/27/1986	31	Penjamillo, Mexico
18	Ben Gamel B. Gamel	OF	5'11"	185	5/17/1992	25	Neptune Beach, FL
19	Ryan Garton R. Garton	P	5'11"	185	12/5/1989	27	Clearwater, FL
20	Sam Gaviglio S. Gaviglio	P	6'2"	195	5/22/1990	27	Ashland, OR
21	Marco Gonzales M. Gonzales	P	6'1"	195	2/16/1992	25	Fort Collins, CO
22	Tuffy Gosewisch T. Gosewisch	C	5'11"	200	8/17/1983	33	Freeport, IL
23	Mitch Haniger M. Haniger	OF	6'2"	215	12/23/1990	26	Mountain View, CA
24	Jacob Hannemann J. Hannemann	OF	6'1"	200	4/29/1991	26	Kahuku, HI
25	Guillermo Heredia G. Heredia	OF	5'10"	180	1/31/1991	26	Matanzas, Cuba