The Seattle Mariners have a 20-22 record on May 18 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	5/18/1979	1-0	SEA	vs	TEX	W 13-5	1.000	36	13	13	3	0	2	13	7	0	2	2	0	44	22	5	0	1	1	0	.361	.455	.611	1.066
2	Mariners	5/18/1980	0-1	SEA	@	CWS	L 5-6	.000	35	5	10	1	0	1	5	4	0	0	1	0	39	14	2	0	0	0	3	.286	.359	.400	.759
3	Mariners	5/18/1981	0-1	SEA	@	BOS	L 5-8	.000	35	5	10	1	0	0	5	7	1	5	0	0	45	11	1	1	1	0	0	.286	.409	.314	.723
4	Mariners	5/18/1982	1-0	SEA	@	BOS	W 3-0	1.000	32	3	7	1	1	1	3	2	0	6	2	0	35	13	3	0	1	0	1	.219	.257	.406	.663
5	Mariners	5/18/1983	1-0	SEA	vs	CAL	W 2-1	1.000	28	2	6	1	0	0	2	3	0	3	0	0	33	7	1	0	2	0	1	.214	.273	.250	.523
6	Mariners	5/18/1984	0-1	SEA	@	BAL	L 1-4	.000	32	1	6	0	0	0	1	1	0	6	0	0	34	6	0	0	1	0	0	.188	.206	.188	.393
7	Mariners	5/18/1985	1-0	SEA	vs	BAL	W 8-7	1.000	39	8	15	1	0	2	8	3	0	5	2	0	43	22	3	0	1	0	2	.385	.419	.564	.983
8	Mariners	5/18/1986	0-1	SEA	@	NYY	L 3-11	.000	35	3	9	1	0	1	3	1	0	9	2	0	36	13	2	0	0	0	1	.257	.278	.371	.649
9	Mariners	5/18/1987	0-1	SEA	vs	BAL	L 0-6	.000	30	0	3	0	0	0	0	2	0	5	1	0	32	3	0	0	0	0	0	.100	.156	.100	.256
10	Mariners	5/18/1989	1-0	SEA	vs	MIL	W 9-5	1.000	34	9	11	2	0	1	6	2	1	8	2	0	38	16	3	1	0	1	0	.324	.378	.471	.849
11	Mariners	5/18/1990	0-1	SEA	@	CLE	L 0-5	.000	29	0	4	1	0	0	0	1	0	2	0	0	30	5	1	0	0	0	1	.138	.167	.172	.339
12	Mariners	5/18/1991	1-0	SEA	@	NYY	W 4-1	1.000	38	4	11	3	0	1	4	0	0	6	2	0	39	17	4	1	0	0	0	.289	.289	.447	.737
13	Mariners	5/18/1992	0-1	SEA	@	BOS	L 2-3	.000	35	2	7	1	0	1	2	2	0	4	0	0	37	11	2	0	0	0	0	.200	.243	.314	.558
14	Mariners	5/18/1993	0-1	SEA	@	TEX	L 2-3	.000	35	2	10	1	0	1	2	2	0	3	0	1	37	14	2	0	0	0	0	.286	.324	.400	.724
15	Mariners	5/18/1994	0-1	SEA	vs	KCR	L 6-7	.000	38	6	11	4	0	2	6	6	2	3	0	1	47	21	6	1	0	2	2	.289	.413	.553	.966
16	Mariners	5/18/1995	0-1	SEA	@	KCR	L 2-3	.000	44	2	7	2	1	1	2	3	0	9	0	1	47	14	4	0	0	0	2	.159	.213	.318	.531
17	Mariners	5/18/1996	1-0	SEA	@	BAL	W 7-3	1.000	37	7	11	1	0	2	7	3	0	3	0	0	40	18	3	0	0	0	0	.297	.350	.486	.836
18	Mariners	5/18/1997	0-1	SEA	vs	BAL	L 7-8	.000	38	7	12	1	2	3	7	2	0	7	0	1	40	26	6	0	0	0	0	.316	.350	.684	1.034
19	Mariners	5/18/1998	1-0	SEA	@	TOR	W 9-4	1.000	38	9	12	5	1	1	9	5	0	11	1	1	43	22	7	0	0	0	0	.316	.395	.579	.974
20	Mariners	5/18/1999	1-0	SEA	vs	MIN	W 10-1	1.000	37	10	13	1	0	4	10	7	0	4	0	0	45	26	5	1	0	0	0	.351	.455	.703	1.157
21	Mariners	5/18/2001	0-1	SEA	vs	NYY	L 10-14	.000	41	10	13	3	0	0	9	4	1	7	5	1	46	16	3	0	0	0	0	.317	.391	.390	.782
22	Mariners	5/18/2002	0-1	SEA	@	BOS	L 1-4	.000	31	1	6	0	0	1	1	1	1	10	1	0	33	9	1	0	0	0	1	.194	.242	.290	.533
23	Mariners	5/18/2003	1-0	SEA	@	DET	W 6-2	1.000	36	6	10	2	0	3	6	2	1	4	1	0	39	21	5	0	0	0	1	.278	.333	.583	.917
24	Mariners	5/18/2004	0-1	SEA	vs	BAL	L 2-7	.000	33	2	6	0	0	2	2	3	0	4	1	0	36	12	2	0	0	0	0	.182	.250	.364	.614
25	Mariners	5/18/2005	1-0	SEA	vs	NYY	W 7-6	1.000	34	7	10	4	0	0	6	1	0	8	0	1	35	14	4	0	0	0	0	.294	.314	.412	.726
	Total		20-22					.476	1,441	190	368	65	8	43	182	122	11	257	41	10	1,601	578	116	10	17	8	25	.255	.315	.401	.716