worst mlb point differentials in a calendar month in live-ball era

Since 1920, the Oakland Athletics have the lowest run differential by a team in a month, with a differential of -118 runs in April 2023.

	TEAM	DIFF	MONTH	G	W%	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	Athletics	-118	April 2023	28	.179	5	23	940	111	216	34	3	33	107	93	21	259	28	6	1,066	355	70	6	6	2	21	.230	.311	.378	.689
2	Phillies	-115	September 1939	33	.182	6	27	1,077	100	260	39	11	14	89	87	1	116	17		1,190	363	64	25			34	.241	.299	.337	.636
3	Tigers	-110	May 1996	27	.148	4	23	898	84	199	35	4	27	79	65	6	205	5	9	979	323	66	6	4	2	24	.222	.277	.360	.637
4	Rockies	-107	May 1993	29	.241	7	22	993	114	249	39	8	20	105	72	13	142	21	21	1,093	364	67	8	7	8	25	.251	.308	.367	.674
5	Rockies	-106	May 2025	28	.143	4	24	926	85	205	39	9	22	84	73	5	257	13	8	1,012	328	70	3	5	2	20	.221	.280	.354	.635
6	Red Sox	-106	May 1929	29	.241	7	22	942	94	235	48	9	4	87	85	4	113	8		1,057	313	61	26				.249	.314	.332	.647
7	Mariners	-101	August 1977	28	.214	6	22	953	91	233	32	8	21	86	71	2	129	26	5	1,036	344	61	5	5	3	21	.244	.297	.361	.658
8	Red Sox	-101	July 1925	30	.200	6	24	1,019	120	269	44	7	8	114	102	3	67	8		1,149	351	59	25				.264	.333	.344	.677
9	Orioles	-100	August 2021	28	.143	4	24	953	108	238	53	2	39	103	60	14	252	14	5	1,036	412	94	3	6	1	19	.250	.302	.432	.734
10	Bees	-100	July 1940	33	.273	9	24	1,163	106	274	47	10	9	92	91	3	138	8		1,276	368	66	19			24	.236	.293	.316	.609
11	Athletics	-99	July 1954	30	.233	7	23	985	97	235	35	10	19	92	85	6	110	2	5	1,097	347	64	11	10		20	.239	.300	.352	.652
12	Browns	-99	July 1953	30	.233	7	23	1,050	124	281	38	2	35	120	86	5	133	3	6	1,151	428	75	10			28	.268	.326	.408	.734
13	Athletics	-99	July 1936	33	.242	8	25	1,204	173	357	62	13	13	161	100	8	107	9		1,320	484	88	8				.297	.354	.402	.756
14	Braves	-99	July 1935	28	.179	5	23	992	102	260	49	4	11	98	57	3	70	4		1,065	350	64	13				.262	.304	.353	.657
15	Tigers	-96	September 2002	26	.192	5	21	863	64	190	37	3	14	58	43	6	169	9	6	923	275	54	4	7	1	17	.220	.260	.319	.579
16	Phillies	-96	June 1921	26	.192	5	21	926	109	273	35	16	11	104	34	6	98	13		984	373	62	18				.295	.324	.403	.727
17	Twins	-95	May 1982	29	.103	3	26	980	89	223	38	6	21	81	73	1	177	7	3	1,065	336	65	1	10	3	20	.228	.279	.343	.622
18	Phillies	-94	June 1945	32	.250	8	24	1,119	134	283	42	8	16	123	105	4	86	12		1,243	389	66	15			27	.253	.319	.348	.667
19	White Sox	-93	May 1948	27	.231	6	20	875	72	195	33	2	6	70	109	1	83	5		999	250	41	14			25	.223	.310	.286	.595
20	Dodgers	-93	July 1944	30	.167	5	25	1,047	117	254	45	9	9	104	90	3	80	5		1,151	344	63	11			19	.243	.304	.329	.633
21	Athletics	-93	August 1939	32	.313	10	22	1,079	130	281	62	3	22	123	105	2	125	13		1,210	415	87	24			33	.260	.327	.385	.712
22	Red Sox	-93	May 1932	25	.160	4	21	829	79	206	29	5	10	71	88	2	74	6		933	275	44	14				.248	.322	.332	.654
23	Red Sox	-93	July 1923	35	.324	11	23	1,197	139	331	59	12	9	134	87	8	114	18		1,327	441	80	35				.277	.330	.368	.698
24	Athletics	-92	August 1954	33	.281	9	23	1,113	100	256	39	9	11	88	104	4	158	11	7	1,236	346	59	11	4		19	.230	.297	.311	.608
25	White Sox	-90	June 1934	31	.226	7	24	1,083	122	288	48	11	17	117	94	4	138	4		1,197	409	76	16				.266	.327	.378	.704