The Chicago White Sox and the Arizona Diamondbacks were tied for the worst record in May 2018, with a record of 8-19.

	TEAM	REC	MONTH	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	White Sox	8-19	May 2018	.296	27	8	19	901	105	221	43	8	30	101	74	4	249	22	5	989	370	81	4	6	4	16	.245	.304	.411	.714
2	Diamondbacks	8-19	May 2018	.296	27	8	19	870	77	168	25	8	22	74	80	5	255	18	6	967	275	55	8	4	2	10	.193	.264	.316	.580
3	Orioles	9-19	May 2018	.321	28	9	19	951	111	226	41	4	32	109	69	7	237	5	3	1,033	371	77	1	5	5	18	.238	.293	.390	.683
4	Blue Jays	9-19	May 2018	.321	28	9	19	940	107	211	60	3	29	100	94	10	271	12	5	1,051	364	92	1	6	4	23	.224	.300	.387	.687
5	Mets	10-18	May 2018	.357	28	10	18	944	98	231	46	5	31	98	80	6	221	11	6	1,037	380	82	0	7	1	19	.245	.306	.403	.708
6	Marlins	10-18	May 2018	.357	28	10	18	934	96	223	39	6	22	92	70	13	229	4	5	1,027	340	67	7	3	7	21	.239	.300	.364	.664
7	Giants	11-16	May 2018	.407	27	11	16	960	124	270	61	6	27	123	84	6	261	9	5	1,065	424	94	6	9	3	22	.281	.340	.442	.782
8	Pirates	12-15	May 2018	.444	27	12	15	920	123	237	48	11	33	121	83	14	201	9	4	1,031	406	92	5	9	4	15	.258	.326	.441	.767
9	Rangers	13-16	May 2018	.448	29	13	16	969	137	221	47	9	36	129	101	17	292	17	5	1,100	394	92	8	5	6	22	.228	.310	.407	.717
10	Reds	13-15	May 2018	.464	28	13	15	953	116	237	42	3	32	113	91	11	226	12	4	1,074	381	77	13	6	4	28	.249	.320	.400	.719
11	Twins	13-15	May 2018	.464	28	13	15	953	120	226	56	2	27	116	96	6	233	7	5	1,068	367	85	5	8	6	21	.237	.309	.385	.694
12	Royals	13-15	May 2018	.464	28	13	15	992	135	266	52	2	29	128	74	10	204	18	1	1,095	409	83	7	12	4	31	.268	.322	.412	.734
13	Angels	14-15	May 2018	.483	29	14	15	977	133	246	59	3	36	130	124	11	224	18	4	1,123	419	98	2	9	5	32	.252	.340	.429	.769
14	Dodgers	14-14	May 2018	.500	28	14	14	915	107	206	44	5	31	102	97	11	231	7	1	1,039	353	80	8	8	7	25	.225	.305	.386	.690
15	Tigers	15-14	May 2018	.517	29	15	14	1,000	116	265	64	6	25	111	67	11	218	12	6	1,084	416	95	2	4	3	24	.265	.317	.416	.733
16	Athletics	15-14	May 2018	.517	29	15	14	981	104	207	52	1	34	100	88	4	260	5	10	1,079	363	87	1	5	3	16	.211	.277	.370	.647
17	Cubs	14-13	May 2018	.519	27	14	13	964	144	263	52	9	36	140	122	7	211	12	4	1,106	441	97	6	7	13	14	.273	.356	.457	.814
18	Indians	15-13	May 2018	.536	28	15	13	1,013	179	287	68	3	48	173	98	10	224	12	6	1,132	505	119	3	8	3	17	.283	.350	.499	.848
19	Padres	15-13	May 2018	.536	28	15	13	906	103	206	45	6	23	96	78	2	249	19	7	999	332	74	7	6	6	22	.227	.288	.366	.655
20	Rays	15-13	May 2018	.536	28	15	13	957	106	245	39	6	25	98	98	12	231	17	8	1,077	371	70	4	6	1	31	.256	.331	.388	.719
21	Cardinals	15-12	May 2018	.556	27	15	12	913	111	227	33	2	33	106	81	13	239	11	10	1,029	363	68	16	6	5	25	.249	.317	.398	.714
22	Astros	16-12	May 2018	.571	28	16	12	976	138	252	59	2	34	132	76	12	230	17	7	1,071	417	95	3	4	2	25	.258	.318	.427	.746
23	Phillies	15-11	May 2018	.577	26	15	11	873	108	210	43	4	33	101	85	8	244	8	2	972	360	80	4	2	4	17	.241	.313	.412	.725
24	Rockies	15-11	May 2018	.577	26	15	11	900	120	232	39	8	34	115	85	6	219	18	2	1,000	389	81	4	5	6	21	.258	.324	.432	.757
25	Braves	17-12	May 2018	.586	29	17	12	988	131	256	43	4	35	125	103	6	213	13	8	1,108	412	82	4	7	10	20	.259	.331	.417	.748