The Seattle Mariners are 19-20 on May 13 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	5/13/1977	0-1	SEA	vs	BOS	L 5-7	.000	37	5	9	2	1	1	5	1	1	4	1	0	39	16	4	0	0	0	0	.243	.282	.432	.714
2	Mariners	5/13/1978	1-0	SEA	@	TOR	W 9-6	1.000	35	9	11	4	1	1	9	8	0	2	2	0	45	20	6	2	0	0	0	.314	.442	.571	1.013
3	Mariners	5/13/1981	0-1	SEA	@	DET	L 0-1	.000	28	0	3	1	0	0	0	3	0	3	0	0	32	4	1	1	0	1	0	.107	.194	.143	.336
4	Mariners	5/13/1982	0-1	SEA	vs	BAL	L 1-3	.000	30	1	5	1	0	0	1	2	0	1	1	0	32	6	1	0	0	0	1	.167	.219	.200	.419
5	Mariners	5/13/1983	0-1	SEA	@	OAK	L 2-9	.000	32	2	6	0	0	0	2	5	0	7	0	0	38	6	0	0	1	0	1	.188	.289	.188	.477
6	Mariners	5/13/1984	0-1	SEA	@	NYY	L 0-7	.000	32	0	9	0	0	0	0	6	0	3	1	1	38	9	0	0	0	0	3	.281	.395	.281	.676
7	Mariners	5/13/1986	1-0	SEA	vs	MIL	W 8-5	1.000	33	8	14	1	2	1	8	3	0	6	0	1	37	22	4	1	0	0	1	.424	.472	.667	1.139
8	Mariners	5/13/1987	1-0	SEA	@	BOS	W 5-4	1.000	35	5	11	1	3	0	5	1	0	2	0	0	37	18	4	0	1	0	2	.314	.324	.514	.839
9	Mariners	5/13/1988	0-1	SEA	@	BOS	L 8-14	.000	37	8	12	2	1	5	7	1	0	2	0	0	38	31	8	0	0	0	1	.324	.342	.838	1.180
10	Mariners	5/13/1989	1-0	SEA	vs	BOS	W 14-6	1.000	39	14	16	1	1	1	11	3	0	5	0	0	44	22	3	1	1	0	0	.410	.442	.564	1.006
11	Mariners	5/13/1990	1-0	SEA	vs	NYY	W 10-5	1.000	37	10	13	2	0	3	9	7	0	4	2	0	44	24	5	0	0	1	0	.351	.455	.649	1.103
12	Mariners	5/13/1992	0-1	SEA	@	NYY	L 4-12	.000	34	4	9	2	0	1	4	3	0	2	0	0	39	14	3	1	1	0	0	.265	.316	.412	.728
13	Mariners	5/13/1994	0-1	SEA	vs	CAL	L 1-11	.000	28	1	3	1	0	1	1	4	0	9	0	0	32	7	2	0	0	0	1	.107	.219	.250	.469
14	Mariners	5/13/1995	1-0	SEA	vs	CWS	W 6-5	1.000	32	6	8	2	0	1	6	5	0	9	0	0	38	13	3	0	1	1	0	.250	.342	.406	.748
15	Mariners	5/13/1997	1-0	SEA	@	MIL	W 2-1	1.000	27	2	3	1	0	0	2	6	0	7	1	1	34	4	1	1	0	1	1	.111	.273	.148	.421
16	Mariners	5/13/1998	0-1	SEA	@	DET	L 5-8	.000	32	5	5	1	0	2	5	3	0	7	1	0	35	12	3	0	0	0	1	.156	.229	.375	.604
17	Mariners	5/13/2000	1-0	SEA	@	OAK	W 6-4	1.000	34	6	6	1	0	1	5	5	1	7	0	1	40	10	2	0	0	0	0	.176	.300	.294	.594
18	Mariners	5/13/2001	1-0	SEA	@	TOR	W 7-5	1.000	40	7	14	2	1	1	5	4	2	7	1	1	46	21	4	0	0	1	1	.350	.435	.525	.960
19	Mariners	5/13/2003	1-0	SEA	@	CLE	W 8-3	1.000	41	8	17	3	1	0	8	3	0	5	0	0	44	22	4	0	0	0	1	.415	.455	.537	.991
20	Mariners	5/13/2004	0-1	SEA	@	MIN	L 0-1	.000	31	0	8	0	0	0	0	3	0	7	0	1	35	8	0	1	0	1	0	.258	.324	.258	.582
21	Mariners	5/13/2005	1-0	SEA	vs	BOS	W 14-7	1.000	38	14	15	4	1	3	14	5	2	4	1	0	45	30	8	0	0	2	1	.395	.489	.789	1.278
22	Mariners	5/13/2006	1-0	SEA	@	LAA	W 5-4	1.000	50	5	11	0	0	3	4	1	0	13	1	1	51	20	3	0	0	0	0	.220	.235	.400	.635
23	Mariners	5/13/2007	1-0	SEA	vs	NYY	W 2-1	1.000	30	2	9	1	0	0	2	2	0	2	0	1	33	10	1	0	1	0	2	.300	.333	.333	.667
24	Mariners	5/13/2008	0-1	SEA	@	TEX	L 2-5	.000	33	2	7	2	0	0	2	3	0	5	0	0	37	9	2	0	1	0	0	.212	.270	.273	.543
25	Mariners	5/13/2009	0-1	SEA	@	TEX	L 5-6	.000	39	5	8	1	0	3	5	3	0	10	2	0	44	18	4	2	0	0	1	.205	.262	.462	.723
	Total		19-20					.487	1,333	182	340	55	14	46	171	138	14	257	22	11	1,506	561	115	13	8	10	29	.255	.330	.421	.750