The Seattle Mariners had a 13-14 record in the month of May in 1977.

	TEAM	REC	SEASON	W%	G	W	L	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	13-14	1977	.481	27	13	14	929	128	257	50	4	25	123	74	6	97	14	15	1,034	390	79	13	12	5	22	.277	.330	.420	.750
2	Mariners	9-15	1978	.375	24	9	15	793	109	204	41	7	12	95	103	4	99	23	7	928	295	60	16	12	4	21	.257	.341	.372	.713
3	Mariners	10-18	1979	.357	28	10	18	943	127	245	40	7	25	124	87	4	144	25	7	1,055	374	72	12	9	7	31	.260	.322	.397	.719
4	Mariners	12-14	1980	.462	26	12	14	866	96	220	38	7	14	90	84	5	124	16	5	977	314	59	17	5	11	28	.254	.322	.363	.684
5	Mariners	12-16	1981	.429	28	12	16	924	106	216	33	2	25	106	92	5	160	30	8	1,041	328	60	9	11	6	14	.234	.303	.355	.658
6	Mariners	14-14	1982	.500	28	14	14	966	108	241	39	6	19	101	71	6	140	16	12	1,056	349	64	8	5	4	22	.249	.303	.361	.665
7	Mariners	12-14	1983	.462	26	12	14	836	73	194	32	5	17	72	78	4	123	37	12	935	287	54	7	10	6	23	.232	.297	.343	.641
8	Mariners	11-16	1984	.407	27	11	16	897	101	215	36	8	18	96	100	4	151	21	12	1,025	321	62	15	9	7	23	.240	.316	.358	.674
9	Mariners	11-14	1985	.440	25	11	14	830	95	200	45	6	27	93	77	8	153	18	6	930	338	78	4	11	6	22	.241	.308	.407	.715
10	Mariners	11-17	1986	.393	28	11	17	967	127	247	50	10	30	119	104	3	205	14	11	1,085	407	90	8	3	9	19	.255	.329	.421	.750
11	Mariners	14-12	1987	.538	26	14	12	898	137	254	42	13	24	127	78	4	157	33	13	1,004	394	79	6	18	5	18	.283	.337	.439	.775
12	Mariners	12-15	1988	.444	27	12	15	903	125	233	39	6	32	117	72	5	125	9	5	988	380	77	5	3	3	22	.258	.315	.421	.736
13	Mariners	14-13	1989	.519	27	14	13	919	121	250	40	5	22	110	67	7	148	19	10	1,009	366	67	7	9	7	18	.272	.323	.398	.722
14	Mariners	15-14	1990	.517	29	15	14	1,003	133	282	42	8	26	126	98	3	136	25	12	1,119	418	76	6	9	8	21	.281	.344	.417	.761
15	Mariners	15-12	1991	.556	27	15	12	913	115	224	34	6	21	107	99	3	133	18	6	1,031	333	61	6	10	8	22	.245	.318	.365	.683
16	Mariners	11-17	1992	.393	28	11	17	926	120	231	46	6	28	116	79	5	134	13	8	1,031	373	80	12	9	9	21	.249	.309	.403	.712
17	Mariners	14-15	1993	.483	29	14	15	1,020	125	278	41	6	30	115	95	13	158	24	14	1,152	421	77	15	9	11	12	.273	.339	.413	.752
18	Mariners	11-16	1994	.407	27	11	16	908	148	252	48	7	45	146	101	7	165	9	8	1,035	449	100	13	6	11	18	.278	.352	.494	.847
19	Mariners	16-12	1995	.571	28	16	12	969	159	271	61	4	26	153	102	8	174	27	8	1,097	418	91	13	5	18	20	.280	.351	.431	.783
20	Mariners	12-14	1996	.462	26	12	14	912	159	271	63	1	47	157	87	6	165	16	6	1,021	477	111	8	8	4	21	.297	.359	.523	.882
21	Mariners	11-16	1997	.407	27	11	16	962	157	276	50	2	42	151	103	9	167	21	4	1,085	456	94	3	8	7	30	.287	.359	.474	.833
22	Mariners	14-14	1998	.500	28	14	14	961	148	261	64	5	45	143	99	12	183	18	3	1,086	470	114	6	8	3	16	.272	.344	.489	.834
23	Mariners	15-12	1999	.556	27	15	12	961	191	296	48	5	58	186	122	4	155	16	9	1,098	528	111	4	7	8	22	.308	.386	.549	.935
24	Mariners	13-14	2000	.481	27	13	14	923	145	252	43	3	35	137	130	4	187	10	11	1,072	406	81	8	7	8	19	.273	.363	.440	.803
25	Mariners	20-7	2001	.741	27	20	7	963	172	277	54	6	26	162	114	11	166	38	6	1,105	421	86	5	12	11	9	.288	.365	.437	.803