The Seattle Mariners are 25-18 on September 21 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	9/21/1977	1-0	SEA	@	MIL	W 11-4	1.000	42	11	18	5	1	0	9	2	0	0	0	2	45	25	6	1	0	0	1	.429	.455	.595	1.050
2	Mariners	9/21/1979	0-1	SEA	vs	CWS	L 4-7	.000	35	4	9	2	0	1	3	2	0	1	1	0	37	14	3	0	0	0	1	.257	.297	.400	.697
3	Mariners	9/21/1980	1-0	SEA	@	MIL	W 7-5	1.000	37	7	12	1	0	2	7	2	0	2	3	1	40	19	3	0	1	0	0	.324	.350	.514	.864
4	Mariners	9/21/1981	0-1	SEA	@	TEX	L 1-4	.000	29	1	3	0	1	0	1	3	0	7	1	0	32	5	1	0	0	0	1	.103	.188	.172	.360
5	Mariners	9/21/1982	1-0	SEA	vs	CWS	W 5-4	1.000	33	5	10	2	0	1	5	3	0	7	5	0	37	15	3	1	0	1	1	.303	.361	.455	.816
6	Mariners	9/21/1983	0-1	SEA	@	TOR	L 3-4	.000	34	3	8	0	0	0	3	3	0	5	0	0	37	8	0	0	0	0	2	.235	.297	.235	.533
7	Mariners	9/21/1984	1-0	SEA	@	CWS	W 5-1	1.000	32	5	8	1	1	1	5	4	0	6	1	0	38	14	3	1	1	0	0	.250	.324	.438	.762
8	Mariners	9/21/1985	0-1	SEA	@	TEX	L 2-7	.000	35	2	6	1	1	0	2	2	0	6	1	0	37	9	2	0	0	0	0	.171	.216	.257	.473
9	Mariners	9/21/1986	0-1	SEA	vs	KCR	L 1-8	.000	34	1	9	3	0	1	1	1	0	6	0	0	35	15	4	0	0	0	2	.265	.286	.441	.727
10	Mariners	9/21/1987	1-0	SEA	vs	KCR	W 5-1	1.000	34	5	9	2	1	2	4	3	1	3	0	0	38	19	5	0	0	0	0	.265	.342	.559	.901
11	Mariners	9/21/1988	0-1	SEA	vs	KCR	L 4-5	.000	36	4	9	2	0	1	4	3	0	5	0	1	39	14	3	0	0	0	0	.250	.308	.389	.697
12	Mariners	9/21/1989	1-0	SEA	@	TEX	W 8-3	1.000	35	8	11	1	0	0	5	3	0	2	1	0	39	12	1	0	1	0	1	.314	.359	.343	.702
13	Mariners	9/21/1990	0-1	SEA	vs	CWS	L 4-5	.000	32	4	9	1	0	0	3	5	0	2	1	1	39	10	1	1	1	0	1	.281	.368	.313	.681
14	Mariners	9/21/1991	1-0	SEA	vs	KCR	W 4-1	1.000	33	4	11	1	0	1	4	3	0	10	2	1	37	15	2	1	0	0	0	.333	.389	.455	.843
15	Mariners	9/21/1992	0-1	SEA	@	KCR	L 0-3	.000	30	0	4	0	0	0	0	1	0	3	0	0	31	4	0	0	0	0	1	.133	.161	.133	.295
16	Mariners	9/21/1993	1-0	SEA	vs	TEX	W 8-0	1.000	31	8	9	3	0	1	8	6	0	4	1	0	38	15	4	1	0	1	0	.290	.405	.484	.889
17	Mariners	9/21/1996	1-0	SEA	vs	OAK	W 9-2	1.000	35	9	12	1	1	5	9	6	1	5	0	0	42	30	7	0	0	0	0	.343	.452	.857	1.310
18	Mariners	9/21/1997	1-0	SEA	@	OAK	W 9-2	1.000	40	9	14	0	0	3	8	2	1	10	2	0	44	23	3	0	1	1	0	.350	.386	.575	.961
19	Mariners	9/21/1998	1-0	SEA	vs	OAK	W 5-2	1.000	34	5	10	6	0	0	5	0	3	5	0	0	37	16	6	0	0	0	0	.294	.351	.471	.822
20	Mariners	9/21/1999	1-0	SEA	vs	KCR	W 13-3	1.000	38	13	15	1	0	5	13	4	2	9	1	0	44	31	6	0	0	0	0	.395	.477	.816	1.293
21	Mariners	9/21/2000	0-1	SEA	vs	OAK	L 2-5	.000	32	2	5	1	0	0	1	6	1	11	2	0	39	6	1	0	0	1	0	.156	.308	.188	.495
22	Mariners	9/21/2001	0-1	SEA	@	OAK	L 1-5	.000	32	1	8	1	1	1	1	4	0	6	0	0	36	14	3	0	0	0	2	.250	.333	.438	.771
23	Mariners	9/21/2002	1-0	SEA	vs	ANA	W 6-4	1.000	31	6	7	2	0	0	3	4	0	10	3	0	36	9	2	0	1	1	0	.226	.306	.290	.596
24	Mariners	9/21/2003	0-1	SEA	@	OAK	L 0-12	.000	30	0	4	1	0	0	0	3	1	10	1	0	35	5	1	1	0	1	0	.133	.235	.167	.402
25	Mariners	9/21/2004	1-0	SEA	@	ANA	W 7-3	1.000	41	7	18	1	0	1	7	1	0	5	1	0	43	22	2	0	1	0	2	.439	.442	.537	.978
	Total		25-18					.581	1,477	208	388	64	12	42	187	129	18	295	33	10	1,644	602	118	11	9	6	29	.263	.328	.408	.735