The Seattle Mariners have a 12-21 record on April 7 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	4/7/1977	0-1	SEA	vs	CAL	L 0-2	.000	30	0	3	1	0	0	0	6	0	6	2	0	36	4	1	0	0	0	0	.100	.250	.133	.383
2	Mariners	4/7/1978	1-0	SEA	vs	MIN	W 6-3	1.000	26	6	6	0	0	3	6	5	1	5	1	1	33	15	3	1	0	0	1	.231	.375	.577	.952
3	Mariners	4/7/1979	0-1	SEA	vs	CAL	L 4-5	.000	36	4	10	4	0	0	4	3	0	4	1	0	39	14	4	0	0	1	0	.278	.333	.389	.722
4	Mariners	4/7/1982	0-1	SEA	@	MIN	L 5-7	.000	38	5	12	3	0	2	4	5	1	4	0	1	44	21	5	0	0	0	1	.316	.409	.553	.962
5	Mariners	4/7/1983	0-1	SEA	vs	NYY	L 1-8	.000	34	1	8	2	0	0	1	3	0	7	2	0	37	10	2	0	0	0	1	.235	.297	.294	.591
6	Mariners	4/7/1984	1-0	SEA	vs	MIL	W 3-2	1.000	28	3	7	0	0	0	3	6	0	5	0	1	35	7	0	1	0	0	2	.250	.382	.250	.632
7	Mariners	4/7/1987	0-1	SEA	@	CAL	L 1-7	.000	30	1	5	0	0	0	1	4	0	8	1	0	34	5	0	0	0	0	2	.167	.265	.167	.431
8	Mariners	4/7/1989	0-1	SEA	@	CAL	L 1-2	.000	30	1	5	0	0	0	1	4	0	4	1	0	35	5	0	1	0	0	1	.167	.265	.167	.431
9	Mariners	4/7/1992	0-1	SEA	vs	TEX	L 0-4	.000	28	0	4	1	0	0	0	4	0	7	0	2	32	5	1	0	0	0	1	.143	.250	.179	.429
10	Mariners	4/7/1993	0-1	SEA	vs	TOR	L 0-2	.000	30	0	3	0	0	0	0	2	0	8	1	0	32	3	0	0	0	0	0	.100	.156	.100	.256
11	Mariners	4/7/1994	0-1	SEA	@	CLE	L 2-6	.000	35	2	9	1	1	0	2	3	0	5	0	0	38	12	2	0	0	0	1	.257	.316	.343	.659
12	Mariners	4/7/1996	1-0	SEA	vs	MIL	W 3-1	1.000	29	3	7	2	0	0	2	4	0	4	2	1	34	9	2	1	0	0	1	.241	.333	.310	.644
13	Mariners	4/7/1997	0-1	SEA	vs	CLE	L 3-8	.000	37	3	11	2	1	1	3	1	0	11	1	0	38	18	4	0	0	0	1	.297	.316	.486	.802
14	Mariners	4/7/1998	0-1	SEA	vs	NYY	L 7-13	.000	41	7	14	3	0	2	7	5	0	8	0	0	47	23	5	0	1	0	1	.341	.404	.561	.965
15	Mariners	4/7/1999	1-0	SEA	vs	CWS	W 7-3	1.000	33	7	10	2	0	3	7	7	1	6	1	0	42	21	5	1	0	0	0	.303	.439	.636	1.075
16	Mariners	4/7/2000	1-0	SEA	vs	NYY	W 7-5	1.000	35	7	12	2	0	2	6	5	0	9	3	0	41	20	4	0	1	1	0	.343	.415	.571	.986
17	Mariners	4/7/2001	1-0	SEA	@	TEX	W 6-5	1.000	39	6	12	3	0	0	6	4	0	2	0	0	43	15	3	0	0	1	0	.308	.372	.385	.757
18	Mariners	4/7/2002	0-1	SEA	vs	OAK	L 5-6	.000	35	5	9	0	1	0	5	7	0	7	3	1	43	11	1	0	1	0	0	.257	.372	.314	.686
19	Mariners	4/7/2004	0-1	SEA	vs	ANA	L 7-10	.000	39	7	13	6	0	1	7	1	0	10	1	1	40	22	7	0	0	0	0	.333	.350	.564	.914
20	Mariners	4/7/2006	0-1	SEA	vs	OAK	L 0-5	.000	27	0	2	0	0	0	0	1	0	8	0	0	28	2	0	0	0	0	1	.074	.107	.074	.181
21	Mariners	4/7/2008	0-1	SEA	@	BAL	L 4-5	.000	32	4	6	2	0	2	3	5	0	6	0	0	38	14	4	1	0	2	0	.188	.297	.438	.735
22	Mariners	4/7/2009	0-1	SEA	@	MIN	L 5-6	.000	35	5	11	1	0	0	5	3	0	4	2	0	39	12	1	0	1	0	2	.314	.359	.343	.702
23	Mariners	4/7/2010	0-1	SEA	@	OAK	L 5-6	.000	33	5	8	0	0	1	5	4	0	6	2	0	38	11	1	0	1	0	1	.242	.316	.333	.649
24	Mariners	4/7/2012	1-0	SEA	@	OAK	W 8-7	1.000	38	8	13	1	2	1	8	1	0	5	1	2	39	21	4	0	0	0	0	.342	.359	.553	.912
25	Mariners	4/7/2013	0-1	SEA	@	CWS	L 3-4	.000	37	3	7	3	0	2	3	3	0	11	0	0	40	16	5	0	0	1	0	.189	.250	.432	.682
	Total		12-21					.364	1,106	138	269	48	5	28	133	116	4	225	33	10	1,239	411	81	7	6	6	17	.243	.316	.372	.687