The Seattle Mariners have a 20-26 record on September 18 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	9/18/1977	0-1	SEA	@	KCR	L 3-8	.000	34	3	7	1	0	1	3	1	0	5	0	0	35	11	2	0	0	0	0	.206	.229	.324	.552
2	Mariners	9/18/1978	0-1	SEA	vs	KCR	L 6-7	.000	45	6	13	1	0	2	6	1	1	0	0	0	47	20	3	0	0	0	1	.289	.319	.444	.764
3	Mariners	9/18/1979	0-1	SEA	vs	MIL	L 6-7	.000	36	6	11	3	0	1	6	4	0	2	1	1	40	17	4	0	0	0	1	.306	.375	.472	.847
4	Mariners	9/18/1980	0-1	SEA	vs	CWS	L 4-5	.000	35	4	11	0	0	1	4	5	0	4	0	1	41	14	1	1	0	0	1	.314	.400	.400	.800
5	Mariners	9/18/1981	0-1	SEA	vs	KCR	L 3-8	.000	32	3	6	1	1	1	3	3	0	1	0	2	35	12	3	0	0	0	0	.188	.257	.375	.632
6	Mariners	9/18/1982	0-1	SEA	vs	TEX	L 4-10	.000	37	4	10	2	1	1	4	3	0	2	1	0	40	17	4	0	0	0	1	.270	.325	.459	.784
7	Mariners	9/18/1983	0-1	SEA	@	CWS	L 0-6	.000	29	0	5	0	0	0	0	4	0	5	0	0	33	5	0	0	0	0	4	.172	.273	.172	.445
8	Mariners	9/18/1984	1-0	SEA	vs	CLE	W 6-3	1.000	32	6	9	2	1	0	4	1	2	5	0	0	36	13	3	1	0	0	2	.281	.343	.406	.749
9	Mariners	9/18/1985	1-0	SEA	@	KCR	W 6-0	1.000	34	6	10	2	0	0	6	7	0	3	2	0	43	12	2	1	1	0	1	.294	.405	.353	.758
10	Mariners	9/18/1986	0-1	SEA	vs	CWS	L 4-6	.000	33	4	7	1	0	3	4	3	0	11	0	1	36	17	4	0	0	0	0	.212	.278	.515	.793
11	Mariners	9/18/1987	1-0	SEA	@	CWS	W 1-0	1.000	37	1	9	1	0	0	1	3	0	6	0	0	40	10	1	0	0	0	0	.243	.300	.270	.570
12	Mariners	9/18/1988	0-1	SEA	vs	MIL	L 2-10	.000	32	2	6	2	0	1	2	3	0	8	0	0	35	11	3	0	0	0	1	.188	.257	.344	.601
13	Mariners	9/18/1989	0-1	SEA	@	TEX	L 2-5	.000	30	2	3	1	0	0	2	5	2	2	0	0	37	4	1	0	0	0	0	.100	.270	.133	.404
14	Mariners	9/18/1990	1-0	SEA	vs	TEX	W 7-3	1.000	29	7	6	1	0	1	7	7	0	3	2	0	36	10	2	0	0	0	1	.207	.361	.345	.706
15	Mariners	9/18/1991	0-1	SEA	vs	TOR	L 3-5	.000	43	3	9	1	1	0	3	3	0	8	0	0	46	12	2	0	0	0	1	.209	.261	.279	.540
16	Mariners	9/18/1992	0-1	SEA	vs	OAK	L 4-7	.000	34	4	10	2	0	1	4	1	0	3	0	0	36	15	3	0	1	0	2	.294	.306	.441	.747
17	Mariners	9/18/1993	0-1	SEA	vs	KCR	L 0-1	.000	27	0	3	0	0	0	0	1	0	3	0	0	30	3	0	2	0	0	1	.111	.143	.111	.254
18	Mariners	9/18/1995	1-0	SEA	vs	TEX	W 8-1	1.000	35	8	11	0	1	2	8	2	0	7	2	1	37	19	3	0	0	0	0	.314	.351	.543	.894
19	Mariners	9/18/1996	1-0	SEA	vs	TEX	W 5-2	1.000	30	5	9	2	0	1	5	6	1	12	0	1	38	14	3	0	1	1	1	.300	.421	.467	.888
20	Mariners	9/18/1997	1-0	SEA	@	TEX	W 6-3	1.000	35	6	9	2	0	3	6	4	1	5	0	0	41	20	5	1	0	0	0	.257	.350	.571	.921
21	Mariners	9/18/1998	1-0	SEA	@	ANA	W 5-3	1.000	44	5	9	5	0	0	5	2	0	10	0	0	47	14	5	1	0	0	0	.205	.239	.318	.557
22	Mariners	9/18/1999	1-0	SEA	vs	MIN	W 5-0	1.000	33	5	11	1	0	1	5	3	0	6	1	0	36	15	2	0	0	0	1	.333	.389	.455	.843
23	Mariners	9/18/2000	1-0	SEA	@	TBD	W 4-3	1.000	35	4	10	6	0	0	4	2	0	12	0	0	37	16	6	0	0	0	1	.286	.324	.457	.781
24	Mariners	9/18/2001	1-0	SEA	vs	ANA	W 4-0	1.000	29	4	10	1	0	0	3	1	0	4	2	0	33	11	1	1	2	0	1	.345	.344	.379	.723
25	Mariners	9/18/2002	1-0	SEA	vs	TEX	W 3-2	1.000	40	3	14	1	0	0	3	7	0	7	1	0	49	15	1	2	0	2	0	.350	.447	.375	.822
	Total		20-26					.435	1,575	161	366	78	6	36	156	147	13	303	16	10	1,755	564	120	14	6	7	41	.232	.302	.358	.660