The Seattle Mariners have a 12-18 record on October 1 all-time.

	TEAM	DATE	REC	TM		OPP	RESULT	W%	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Mariners	10/1/1977	1-0	SEA	@	CWS	W 5-3	1.000	35	5	10	1	1	0	5	5	0	4	2	1	41	13	2	1	0	1	0	.286	.375	.371	.746
2	Mariners	10/1/1977	0-1	SEA	@	CWS	L 1-6	.000	34	1	8	2	0	0	1	2	1	5	0	0	38	10	2	0	1	0	1	.235	.289	.294	.584
3	Mariners	10/1/1978	0-1	SEA	vs	TEX	L 4-9	.000	37	4	13	1	0	1	3	3	0	5	1	0	40	17	2	0	0	0	3	.351	.400	.459	.859
4	Mariners	10/1/1980	0-1	SEA	@	KCR	L 1-4	.000	29	1	5	1	0	1	1	1	0	4	0	2	30	9	2	0	0	0	2	.172	.200	.310	.510
5	Mariners	10/1/1982	0-1	SEA	@	TOR	L 0-2	.000	30	0	4	0	0	0	0	2	0	7	0	1	32	4	0	0	0	0	0	.133	.188	.133	.321
6	Mariners	10/1/1983	0-1	SEA	vs	CWS	L 3-9	.000	36	3	10	6	0	0	3	2	0	7	0	0	38	16	6	0	0	0	1	.278	.316	.444	.760
7	Mariners	10/1/1985	0-1	SEA	@	CLE	L 3-9	.000	31	3	5	1	0	1	3	2	0	7	1	0	34	9	2	1	0	0	0	.161	.212	.290	.502
8	Mariners	10/1/1986	0-1	SEA	@	CWS	L 1-3	.000	32	1	7	0	0	0	1	3	0	9	0	1	36	7	0	1	0	0	0	.219	.286	.219	.504
9	Mariners	10/1/1987	1-0	SEA	@	TEX	W 8-6	1.000	37	8	11	1	1	1	7	5	0	7	2	3	42	17	3	0	0	0	0	.297	.381	.459	.840
10	Mariners	10/1/1988	1-0	SEA	vs	TEX	W 4-3	1.000	34	4	7	1	1	2	4	6	0	9	0	0	42	16	4	2	0	1	0	.206	.325	.471	.796
11	Mariners	10/1/1989	1-0	SEA	vs	MIN	W 3-1	1.000	32	3	9	1	0	1	3	2	0	2	0	1	35	13	2	1	0	0	0	.281	.324	.406	.730
12	Mariners	10/1/1990	0-1	SEA	@	MIN	L 5-7	.000	39	5	13	4	0	2	5	5	1	4	2	0	45	23	6	0	0	0	1	.333	.422	.590	1.012
13	Mariners	10/1/1991	1-0	SEA	@	TEX	W 8-1	1.000	36	8	11	2	1	1	8	2	1	4	0	0	39	18	4	0	0	0	2	.306	.359	.500	.859
14	Mariners	10/1/1992	0-1	SEA	vs	MIL	L 2-7	.000	34	2	4	1	0	1	2	1	0	5	0	1	35	8	2	0	0	1	0	.118	.143	.235	.378
15	Mariners	10/1/1993	1-0	SEA	@	MIN	W 8-2	1.000	39	8	14	6	1	1	8	1	2	6	0	0	43	25	8	0	1	0	0	.359	.395	.641	1.036
16	Mariners	10/1/1995	0-1	SEA	@	TEX	L 3-9	.000	35	3	8	0	0	2	3	3	0	4	0	0	38	14	2	0	0	0	0	.229	.289	.400	.689
17	Mariners	10/1/1997	0-1	SEA	vs	BAL	L 3-9	.000	33	3	7	2	0	3	3	1	0	11	0	0	34	18	5	0	0	0	1	.212	.235	.545	.781
18	Mariners	10/1/1999	0-1	SEA	@	OAK	L 1-5	.000	30	1	4	1	0	0	0	3	0	10	0	0	33	5	1	0	0	0	2	.133	.212	.167	.379
19	Mariners	10/1/2000	1-0	SEA	@	ANA	W 5-2	1.000	39	5	12	2	0	2	5	2	0	3	1	0	41	20	4	0	0	1	1	.308	.341	.513	.854
20	Mariners	10/1/2004	1-0	SEA	vs	TEX	W 8-3	1.000	41	8	18	1	0	0	7	1	0	8	2	0	42	19	1	0	0	0	1	.439	.452	.463	.916
21	Mariners	10/1/2005	0-1	SEA	vs	OAK	L 3-4	.000	34	3	9	1	0	1	3	4	0	10	0	0	39	13	2	0	1	0	1	.265	.333	.382	.716
22	Mariners	10/1/2006	1-0	SEA	vs	TEX	W 3-2	1.000	30	3	7	2	0	2	3	1	0	5	0	0	31	15	4	0	0	0	0	.233	.258	.500	.758
23	Mariners	10/1/2009	1-0	SEA	vs	OAK	W 4-2	1.000	31	4	8	1	0	1	4	1	0	7	1	0	32	12	2	0	0	0	1	.258	.281	.387	.668
24	Mariners	10/1/2010	0-1	SEA	vs	OAK	L 0-9	.000	30	0	6	0	0	0	0	4	0	8	0	0	34	6	0	0	0	0	2	.200	.294	.200	.494
25	Mariners	10/1/2012	0-1	SEA	vs	LAA	L 4-8	.000	37	4	9	3	0	1	3	5	0	9	0	0	42	15	4	0	0	0	1	.243	.333	.405	.739
	Total		12-18					.400	1,018	107	254	48	6	27	101	81	9	205	15	10	1,118	395	81	6	4	5	25	.250	.309	.388	.697