The Seattle Mariners have a record of 21-21 on May 9 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	5/9/1977	0-1	SEA	@	TOR	L 4-10	.000	34	4	8	0	0	1	4	4	0	4	0	0	39	11	1	1	0	0	1	.235	.316	.324	.639
2	Mariners	5/9/1978	0-1	SEA	@	CLE	L 4-5	.000	32	4	7	1	0	0	3	6	0	11	1	0	40	8	1	2	0	1	0	.219	.342	.250	.592
3	Mariners	5/9/1979	0-1	SEA	@	NYY	L 0-5	.000	31	0	5	0	0	0	0	3	0	2	0	0	34	5	0	0	0	0	1	.161	.235	.161	.397
4	Mariners	5/9/1980	0-1	SEA	vs	CLE	L 1-4	.000	34	1	9	1	0	1	1	4	0	6	1	0	38	13	2	0	0	0	2	.265	.342	.382	.724
5	Mariners	5/9/1981	1-0	SEA	vs	NYY	W 6-5	1.000	35	6	8	2	0	1	6	4	0	7	2	1	39	13	3	0	0	0	0	.229	.308	.371	.679
6	Mariners	5/9/1982	0-1	SEA	vs	NYY	L 0-3	.000	32	0	5	1	1	0	0	2	0	5	1	0	34	8	2	0	0	0	1	.156	.206	.250	.456
7	Mariners	5/9/1983	1-0	SEA	@	BAL	W 6-4	1.000	33	6	7	2	0	1	6	5	0	4	5	1	39	12	3	0	1	0	0	.212	.308	.364	.671
8	Mariners	5/9/1984	1-0	SEA	@	OAK	W 4-1	1.000	29	4	5	2	0	0	4	8	1	6	1	1	39	7	2	1	0	1	1	.172	.368	.241	.610
9	Mariners	5/9/1986	1-0	SEA	vs	TOR	W 13-3	1.000	34	13	11	3	0	4	13	8	0	6	0	1	42	26	7	0	0	0	0	.324	.452	.765	1.217
10	Mariners	5/9/1987	1-0	SEA	@	MIL	W 8-2	1.000	34	8	10	2	0	0	8	6	0	9	2	1	41	12	2	1	0	0	1	.294	.400	.353	.753
11	Mariners	5/9/1989	1-0	SEA	@	TOR	W 4-3	1.000	35	4	10	2	0	0	3	2	0	6	0	0	38	12	2	1	0	0	1	.286	.324	.343	.667
12	Mariners	5/9/1990	0-1	SEA	vs	BOS	L 1-4	.000	30	1	4	0	0	1	1	1	0	6	0	1	31	7	1	0	0	0	0	.133	.161	.233	.395
13	Mariners	5/9/1992	0-1	SEA	vs	DET	L 0-13	.000	33	0	5	0	0	0	0	2	0	4	0	0	35	5	0	0	0	0	1	.152	.200	.152	.352
14	Mariners	5/9/1993	1-0	SEA	vs	MIN	W 6-4	1.000	28	6	8	1	1	2	6	1	1	5	2	0	33	17	4	1	2	0	1	.286	.313	.607	.920
15	Mariners	5/9/1994	1-0	SEA	@	CWS	W 3-2	1.000	32	3	7	1	0	2	3	2	0	6	0	0	35	14	3	1	0	0	1	.219	.265	.438	.702
16	Mariners	5/9/1995	0-1	SEA	@	OAK	L 5-7	.000	37	5	11	1	0	1	5	7	0	11	4	0	45	15	2	1	0	2	0	.297	.409	.405	.814
17	Mariners	5/9/1997	1-0	SEA	@	BAL	W 8-2	1.000	39	8	14	3	0	2	8	4	1	10	3	0	45	23	5	0	1	1	1	.359	.422	.590	1.012
18	Mariners	5/9/1998	0-1	SEA	vs	TOR	L 1-4	.000	36	1	8	1	0	0	1	4	0	6	2	0	40	9	1	0	0	0	0	.222	.300	.250	.550
19	Mariners	5/9/1999	0-1	SEA	@	NYY	L 1-6	.000	30	1	3	1	0	0	1	3	0	9	0	0	33	4	1	0	0	0	1	.100	.182	.133	.315
20	Mariners	5/9/2000	1-0	SEA	@	TEX	W 13-3	1.000	45	13	19	2	0	3	13	3	0	6	0	0	48	30	5	0	0	0	1	.422	.458	.667	1.125
21	Mariners	5/9/2001	1-0	SEA	@	BOS	W 10-5	1.000	43	10	14	4	0	0	10	4	2	2	4	0	49	18	4	0	0	0	1	.326	.408	.419	.827
22	Mariners	5/9/2002	1-0	SEA	vs	TOR	W 8-7	1.000	43	8	14	3	1	1	7	16	0	5	6	1	60	22	5	1	0	3	0	.326	.508	.512	1.020
23	Mariners	5/9/2003	1-0	SEA	vs	CWS	W 6-3	1.000	32	6	11	3	2	0	6	5	1	4	0	0	40	18	5	1	1	0	1	.344	.436	.563	.998
24	Mariners	5/9/2004	0-1	SEA	vs	NYY	L 6-7	.000	34	6	8	2	0	1	6	3	0	8	0	0	37	13	3	0	0	0	1	.235	.297	.382	.680
25	Mariners	5/9/2005	0-1	SEA	@	NYY	L 3-4	.000	32	3	7	1	0	1	3	2	0	8	1	1	35	11	2	0	1	1	1	.219	.257	.344	.601
	Total		21-21					.500	1,428	193	363	67	6	34	182	171	16	289	48	13	1,636	544	107	13	8	11	27	.254	.339	.381	.720