Jamie Moyer has won the most games for the Mariners in a season, with 21 wins in 2003.

Interpreted as:

most wins by a player by year for the mariners

	NAME	W	SEASON	TM	L	W%	G	GS	ERA	SO	CG	SHO	SV	IP	H	ER	R	HR	BB	HBP	GF	IBB	TBF	WP	K/9	BB/9	K/BB	HR/9	K%	BB%	WHIP	BABIP	RA	ERA-	FIP	FIP-	H/9	PRAA
1	Jamie Moyer J. Moyer	21	2003	SEA	7	.750	33	33	3.27	129	1	0	0	215.0	199	78	83	19	66	8	0	3	897	0	5.40	2.76	1.95	0.80	14.4	7.4	1.23	.267	3.47	76	4.01	92	8.33	8.7
2	Jamie Moyer J. Moyer	20	2001	SEA	6	.769	33	33	3.43	119	1	0	0	209.2	187	80	84	24	44	10	0	4	851	1	5.11	1.89	2.70	1.03	14.0	5.2	1.10	.249	3.61	80	4.17	96	8.03	3.8
3	Randy Johnson R. Johnson	20	1997	SEA	4	.833	30	29	2.28	291	5	2	0	213.0	147	54	60	20	77	10	0	2	850	4	12.30	3.25	3.78	0.85	34.2	9.1	1.05	.281	2.54	50	2.82	62	6.21	41.3
4	Felix Hernandez F. Hernandez	19	2009	SEA	5	.792	34	34	2.49	217	2	1	0	238.2	200	66	81	15	71	8	0	0	977	17	8.18	2.68	3.06	0.57	22.2	7.3	1.14	.278	3.05	58	3.08	71	7.54	33.4
5	Randy Johnson R. Johnson	19	1993	SEA	8	.704	35	34	3.24	308	10	3	1	255.1	185	92	97	22	99	16	1	1	1,043	8	10.86	3.49	3.11	0.78	29.5	9.5	1.11	.273	3.42	74	3.04	70	6.52	36.2
6	Mark Langston M. Langston	19	1987	SEA	13	.594	35	35	3.84	262	14	3	0	272.0	242	116	132	30	114	5	0	0	1,152	9	8.67	3.77	2.30	0.99	22.7	9.9	1.31	.286	4.37	84	3.68	79	8.01	29.5
7	Felix Hernandez F. Hernandez	18	2015	SEA	9	.667	31	31	3.53	191	2	2	0	201.2	180	79	80	23	58	9	0	0	826	10	8.52	2.59	3.29	1.03	23.1	7.0	1.18	.288	3.57	92	3.71	94	8.03	5.4
8	Freddy Garcia F. Garcia	18	2001	SEA	6	.750	34	34	3.05	163	4	3	0	238.2	199	81	88	16	69	5	0	6	971	3	6.15	2.60	2.36	0.60	16.8	7.1	1.12	.255	3.32	71	3.48	80	7.50	23
9	Randy Johnson R. Johnson	18	1995	SEA	2	.900	30	30	2.48	294	6	3	0	214.1	159	59	65	12	65	6	0	1	866	5	12.35	2.73	4.52	0.50	33.9	7.5	1.05	.301	2.73	53	2.08	44	6.68	62
10	Erik Hanson E. Hanson	18	1990	SEA	9	.667	33	33	3.24	211	5	1	0	236.0	205	85	88	15	68	2	0	6	964	10	8.05	2.59	3.10	0.57	21.9	7.1	1.16	.284	3.36	81	2.73	68	7.82	32.6
11	Paul Abbott P. Abbott	17	2001	SEA	4	.810	28	27	4.25	118	1	0	0	163.0	145	77	79	21	87	7	0	5	710	11	6.52	4.80	1.36	1.16	16.6	12.3	1.42	.260	4.36	99	5.00	115	8.01	-12.4
12	Aaron Sele A. Sele	17	2000	SEA	10	.630	34	34	4.51	137	2	2	0	211.2	221	106	110	17	74	5	0	7	908	5	5.83	3.15	1.85	0.72	15.1	8.1	1.39	.302	4.68	96	3.99	85	9.40	17.4
13	Freddy Garcia F. Garcia	17	1999	SEA	8	.680	33	33	4.07	170	2	1	0	201.1	205	91	96	18	90	10	0	4	888	12	7.60	4.02	1.89	0.80	19.1	10.1	1.47	.312	4.29	87	4.09	87	9.16	13.7
14	Jamie Moyer J. Moyer	17	1997	SEA	5	.773	30	30	3.86	113	2	0	0	188.2	187	81	82	21	43	7	0	2	787	3	5.39	2.05	2.63	1.00	14.4	5.5	1.22	.275	3.91	85	4.15	91	8.92	9
15	Dave Fleming D. Fleming	17	1992	SEA	10	.630	33	33	3.39	112	7	4	0	228.1	225	86	95	13	60	4	0	3	946	8	4.41	2.36	1.87	0.51	11.8	6.3	1.25	.280	3.74	86	3.38	86	8.87	14.2
16	Mike Moore M. Moore	17	1985	SEA	10	.630	35	34	3.46	155	14	2	0	247.0	230	95	100	18	70	4	1	2	1,016	10	5.65	2.55	2.21	0.66	15.3	6.9	1.21	.276	3.64	83	3.27	77	8.38	26.4
17	Mark Langston M. Langston	17	1984	SEA	10	.630	35	33	3.40	204	5	2	0	225.0	188	85	99	16	118	8	0	5	965	4	8.16	4.72	1.73	0.64	21.1	12.2	1.36	.278	3.96	84	3.55	85	7.52	15.4
18	Marco Gonzales M. Gonzales	16	2019	SEA	13	.552	34	34	3.99	147	0	0	0	203.0	210	90	106	23	56	6	0	1	866	2	6.52	2.48	2.63	1.02	17.0	6.5	1.31	.295	4.70	90	4.14	93	9.31	7.4
19	Hisashi Iwakuma H. Iwakuma	16	2016	SEA	12	.571	33	33	4.12	147	0	0	0	199.0	218	91	95	28	46	5	0	3	836	4	6.65	2.08	3.20	1.27	17.6	5.5	1.33	.311	4.30	103	4.26	102	9.86	-2.5
20	Miguel Batista M. Batista	16	2007	SEA	11	.593	33	32	4.29	133	0	0	0	193.0	209	92	101	18	85	8	0	3	860	15	6.20	3.96	1.56	0.84	15.5	9.9	1.52	.310	4.71	98	4.51	104	9.75	-3.8
21	Joel Pineiro J. Pineiro	16	2003	SEA	11	.593	32	32	3.78	151	3	2	0	211.2	192	89	94	19	76	6	0	3	890	5	6.42	3.23	1.99	0.81	17.0	8.5	1.27	.271	4.00	88	3.93	90	8.16	10.5
22	Freddy Garcia F. Garcia	16	2002	SEA	10	.615	34	34	4.39	181	1	0	0	223.2	227	109	110	30	63	6	0	3	955	7	7.28	2.54	2.87	1.21	19.0	6.6	1.30	.292	4.43	105	4.00	94	9.13	6.6
23	Jeff Fassero J. Fassero	16	1997	SEA	9	.640	35	35	3.61	189	2	1	0	234.1	226	94	108	21	84	3	0	6	1,010	13	7.26	3.23	2.25	0.81	18.7	8.3	1.32	.288	4.15	79	3.77	82	8.68	20.9
24	Bryan Woo B. Woo	15	2025	SEA	7	.682	30	30	2.94	198	0	0	0	186.2	137	61	64	26	36	4	0	0	731	3	9.55	1.74	5.50	1.25	27.1	4.9	0.93	.238	3.09	77	3.46	86	6.61	11.4
25	Felix Hernandez F. Hernandez	15	2014	SEA	6	.714	34	34	2.14	248	0	0	0	236.0	170	56	68	16	46	5	0	1	912	18	9.46	1.75	5.39	0.61	27.2	5.0	0.92	.258	2.59	58	2.56	69	6.48	30.7