The Seattle Mariners are 18-25 on April 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	4/21/1978	0-1	SEA	vs	OAK	L 3-5	.000	34	3	8	2	0	0	3	8	0	5	0	1	42	10	2	0	0	0	0	.235	.381	.294	.675
2	Mariners	4/21/1979	0-1	SEA	@	MIN	L 5-6	.000	39	5	15	1	0	0	5	2	0	5	0	0	42	16	1	0	1	0	2	.385	.405	.410	.815
3	Mariners	4/21/1980	0-1	SEA	vs	OAK	L 2-4	.000	30	2	7	1	0	1	2	4	0	4	1	2	36	11	2	2	0	1	0	.233	.324	.367	.690
4	Mariners	4/21/1981	1-0	SEA	@	CAL	W 3-0	1.000	34	3	10	1	0	0	3	1	0	5	1	1	36	11	1	1	0	0	1	.294	.314	.324	.638
5	Mariners	4/21/1982	1-0	SEA	vs	CAL	W 5-3	1.000	33	5	12	4	0	1	5	3	1	4	0	0	37	19	5	0	0	0	0	.364	.432	.576	1.008
6	Mariners	4/21/1983	1-0	SEA	@	MIN	W 2-0	1.000	36	2	10	2	0	2	2	2	0	6	2	1	38	18	4	0	0	0	0	.278	.316	.500	.816
7	Mariners	4/21/1984	0-1	SEA	@	MIL	L 2-6	.000	32	2	7	1	0	0	2	2	0	3	0	0	35	8	1	1	0	0	0	.219	.265	.250	.515
8	Mariners	4/21/1985	0-1	SEA	@	CAL	L 2-9	.000	30	2	4	2	0	1	2	4	0	2	0	0	34	9	3	0	0	0	2	.133	.235	.300	.535
9	Mariners	4/21/1986	0-1	SEA	vs	MIN	L 2-5	.000	27	2	4	0	0	1	2	5	0	9	0	1	32	7	1	0	0	0	3	.148	.281	.259	.541
10	Mariners	4/21/1987	0-1	SEA	@	MIN	L 1-6	.000	34	1	7	1	1	0	1	3	0	8	0	0	37	10	2	0	0	0	0	.206	.270	.294	.564
11	Mariners	4/21/1988	0-1	SEA	@	CAL	L 6-11	.000	36	6	12	2	0	1	3	2	0	7	0	1	39	17	3	0	1	1	2	.333	.359	.472	.831
12	Mariners	4/21/1989	1-0	SEA	@	CWS	W 11-1	1.000	41	11	16	2	0	2	11	1	1	4	0	0	44	24	4	0	1	0	1	.390	.409	.585	.994
13	Mariners	4/21/1990	0-1	SEA	@	OAK	L 6-7	.000	41	6	10	2	0	2	6	3	1	1	0	2	45	18	4	0	0	0	0	.244	.311	.439	.750
14	Mariners	4/21/1991	1-0	SEA	vs	OAK	W 7-2	1.000	30	7	9	2	0	1	7	6	0	4	0	2	37	14	3	0	1	1	0	.300	.405	.467	.872
15	Mariners	4/21/1992	0-1	SEA	vs	MIN	L 2-5	.000	35	2	10	0	0	2	2	4	0	6	2	1	39	16	2	0	0	0	1	.286	.359	.457	.816
16	Mariners	4/21/1993	1-0	SEA	vs	BOS	W 5-0	1.000	32	5	10	0	0	2	4	1	0	3	2	0	33	16	2	0	0	0	1	.313	.333	.500	.833
17	Mariners	4/21/1994	0-1	SEA	@	NYY	L 2-4	.000	32	2	6	0	0	1	2	2	0	2	0	0	34	9	1	0	0	0	1	.188	.235	.281	.517
18	Mariners	4/21/1996	1-0	SEA	vs	TOR	W 9-5	1.000	35	9	13	4	0	4	9	4	1	3	1	0	40	29	8	0	0	1	2	.371	.450	.829	1.279
19	Mariners	4/21/1997	1-0	SEA	vs	KCR	W 6-5	1.000	29	6	9	1	1	0	6	3	0	2	1	0	36	12	2	2	2	0	0	.310	.353	.414	.767
20	Mariners	4/21/1998	0-1	SEA	vs	KCR	L 3-5	.000	34	3	9	2	0	1	2	7	2	5	0	0	44	14	3	1	0	0	1	.265	.419	.412	.830
21	Mariners	4/21/1999	0-1	SEA	@	CWS	L 1-2	.000	32	1	6	2	0	0	1	2	0	6	0	0	35	8	2	0	1	0	2	.188	.229	.250	.479
22	Mariners	4/21/2000	1-0	SEA	vs	KCR	W 10-2	1.000	34	10	10	5	0	1	10	7	0	5	0	0	42	18	6	1	0	0	0	.294	.415	.529	.944
23	Mariners	4/21/2001	1-0	SEA	vs	ANA	W 5-2	1.000	31	5	8	1	0	1	5	3	0	2	0	1	34	12	2	0	0	0	0	.258	.324	.387	.711
24	Mariners	4/21/2002	1-0	SEA	vs	TEX	W 5-3	1.000	31	5	8	0	2	1	5	1	0	3	1	0	33	15	3	0	1	0	0	.258	.273	.484	.757
25	Mariners	4/21/2004	0-1	SEA	vs	OAK	L 4-7	.000	31	4	9	1	0	1	4	1	3	6	0	0	35	13	2	0	0	0	5	.290	.371	.419	.791
	Total		18-25					.419	1,430	181	369	64	8	41	175	134	19	258	17	18	1,606	572	113	9	14	5	35	.258	.327	.400	.727