The Seattle Mariners have a record of 19-24 on May 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	5/21/1977	1-0	SEA	@	OAK	W 7-6	1.000	34	7	11	1	0	1	7	5	0	3	1	1	42	15	2	2	1	1	0	.324	.400	.441	.841
2	Mariners	5/21/1978	0-1	SEA	vs	TEX	L 4-5	.000	30	4	6	1	0	2	4	3	0	3	1	1	35	13	3	2	0	0	0	.200	.273	.433	.706
3	Mariners	5/21/1979	1-0	SEA	@	KCR	W 12-7	1.000	38	12	15	6	1	1	12	4	0	5	0	0	44	26	8	1	1	1	2	.395	.442	.684	1.126
4	Mariners	5/21/1980	1-0	SEA	vs	MIL	W 6-5	1.000	32	6	11	1	0	2	5	3	0	2	0	1	35	18	3	0	0	0	1	.344	.400	.563	.963
5	Mariners	5/21/1981	1-0	SEA	@	CLE	W 6-3	1.000	37	6	14	3	0	0	6	3	0	2	1	0	41	17	3	0	1	0	0	.378	.415	.459	.874
6	Mariners	5/21/1982	0-1	SEA	@	MIL	L 1-4	.000	29	1	4	0	0	0	1	2	0	11	0	1	32	4	0	1	0	0	0	.138	.194	.138	.331
7	Mariners	5/21/1983	1-0	SEA	vs	MIL	W 5-4	1.000	32	5	11	1	0	1	5	4	0	5	2	0	38	15	2	1	1	0	0	.344	.405	.469	.874
8	Mariners	5/21/1985	0-1	SEA	vs	NYY	L 1-11	.000	30	1	4	0	0	0	1	1	0	6	0	0	31	4	0	0	0	0	2	.133	.161	.133	.295
9	Mariners	5/21/1986	0-1	SEA	@	DET	L 4-6	.000	33	4	7	1	0	2	4	2	0	7	1	1	35	14	3	0	0	1	0	.212	.257	.424	.681
10	Mariners	5/21/1988	0-1	SEA	@	BAL	L 1-3	.000	33	1	10	3	0	0	1	0	0	4	0	0	33	13	3	0	0	0	2	.303	.303	.394	.697
11	Mariners	5/21/1989	0-1	SEA	vs	NYY	L 2-6	.000	32	2	5	1	0	1	2	2	0	10	0	0	34	9	2	0	0	0	0	.156	.206	.281	.487
12	Mariners	5/21/1990	1-0	SEA	@	MIL	W 9-4	1.000	38	9	12	4	1	1	9	4	0	8	1	0	43	21	6	0	1	0	0	.316	.372	.553	.925
13	Mariners	5/21/1991	0-1	SEA	@	KCR	L 3-4	.000	30	3	5	1	0	0	2	1	0	5	0	0	32	6	1	1	0	0	1	.167	.194	.200	.394
14	Mariners	5/21/1993	0-1	SEA	@	KCR	L 1-2	.000	32	1	6	2	0	0	1	1	0	2	0	0	33	8	2	0	0	0	0	.188	.212	.250	.462
15	Mariners	5/21/1994	1-0	SEA	vs	TEX	W 13-2	1.000	39	13	16	1	0	5	13	4	1	5	0	0	45	32	6	1	0	0	2	.410	.477	.821	1.298
16	Mariners	5/21/1995	1-0	SEA	@	MIN	W 5-2	1.000	35	5	8	3	0	0	5	3	0	7	1	0	38	11	3	0	0	1	0	.229	.289	.314	.604
17	Mariners	5/21/1996	1-0	SEA	@	BOS	W 13-7	1.000	44	13	19	6	0	2	13	4	0	6	2	0	48	31	8	0	0	0	2	.432	.479	.705	1.184
18	Mariners	5/21/1997	0-1	SEA	@	ANA	L 3-18	.000	36	3	10	1	0	1	3	1	0	9	0	0	37	14	2	0	0	0	1	.278	.297	.389	.686
19	Mariners	5/21/1998	0-1	SEA	@	TEX	L 8-9	.000	37	8	14	7	1	1	8	3	1	6	1	1	44	26	9	2	1	0	0	.378	.429	.703	1.131
20	Mariners	5/21/1999	1-0	SEA	@	KCR	W 5-2	1.000	36	5	12	2	0	0	5	4	0	6	2	0	41	14	2	1	0	0	1	.333	.400	.389	.789
21	Mariners	5/21/2000	1-0	SEA	vs	TBD	W 8-4	1.000	38	8	16	3	0	4	8	3	0	3	1	1	41	31	7	0	0	0	0	.421	.463	.816	1.279
22	Mariners	5/21/2002	0-1	SEA	vs	TBD	L 0-1	.000	28	0	4	0	0	0	0	1	0	7	0	1	30	4	0	1	0	0	0	.143	.172	.143	.315
23	Mariners	5/21/2003	0-1	SEA	vs	KCR	L 5-14	.000	37	5	10	2	0	1	5	2	0	5	0	0	39	15	3	0	0	1	1	.270	.308	.405	.713
24	Mariners	5/21/2004	0-1	SEA	vs	DET	L 0-5	.000	35	0	8	0	0	0	0	5	0	4	0	0	40	8	0	0	0	0	1	.229	.325	.229	.554
25	Mariners	5/21/2005	1-0	SEA	vs	SDP	W 5-3	1.000	32	5	8	2	1	2	5	0	0	6	1	0	32	18	5	0	0	0	0	.250	.250	.563	.813
	Total		19-24					.442	1,455	203	387	72	6	48	199	129	9	280	26	12	1,621	615	126	17	11	8	27	.266	.327	.423	.750