team with worst run differential in a single season from 1940 to 1950

Between the 1940 and 1950 seasons, the Philadelphia Phillies had the lowest run differential by a team in a season, with a differential of -316 runs in 1945.

	TEAM	DIFF	SEASON	G	W%	W	L	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	GIDP	AVG	OBP	SLG	OPS
1	Phillies	-316	1945	154	.299	46	108	5,203	548	1,278	197	27	56	503	449	15	501	54		5,738	1,697	280	71	113	.246	.307	.326	.634
2	Phillies	-309	1942	151	.278	42	109	5,060	394	1,174	168	37	44	356	392	16	487	37		5,557	1,548	249	89	109	.232	.289	.306	.595
3	Phillies	-292	1941	155	.279	43	111	5,233	501	1,277	188	38	64	467	451	22	595	65		5,796	1,733	290	90	142	.244	.307	.331	.638
4	Senators	-284	1949	154	.325	50	104	5,234	584	1,330	207	41	81	546	593	22	494	46	33	5,912	1,862	329	63	132	.254	.333	.356	.688
5	White Sox	-256	1948	154	.336	51	101	5,192	558	1,303	172	39	55	532	594	12	528	46	47	5,871	1,718	266	73	119	.251	.329	.331	.660
6	Phillies	-256	1940	153	.327	50	103	5,137	494	1,225	180	35	75	459	435	14	527	25		5,673	1,700	290	87	115	.238	.300	.331	.631
7	Athletics	-252	1942	154	.357	55	99	5,285	549	1,315	213	46	33	517	441	23	489	44	45	5,823	1,719	292	74	129	.249	.309	.325	.635
8	Browns	-247	1949	155	.344	53	101	5,112	666	1,301	213	30	117	628	631	21	700	38	39	5,847	1,925	360	83	138	.254	.339	.377	.715
9	Athletics	-243	1950	154	.338	52	102	5,212	670	1,361	204	53	100	627	685	23	491	42	25	5,993	1,971	357	73	170	.261	.349	.378	.728
10	Browns	-232	1950	154	.377	58	96	5,163	684	1,269	235	43	106	642	691	20	742	39	40	5,971	1,908	384	97	138	.246	.337	.370	.707
11	Athletics	-229	1940	154	.351	54	100	5,304	703	1,391	242	53	105	648	556	19	655	48	33	5,948	2,054	400	69	127	.262	.334	.387	.722
12	Athletics	-220	1943	155	.318	49	105	5,244	497	1,219	174	44	26	462	430	29	465	55	42	5,798	1,559	244	95	132	.232	.294	.297	.592
13	Senators	-217	1948	154	.366	56	97	5,111	578	1,245	203	75	31	537	569	20	570	76	48	5,784	1,691	309	84	124	.244	.322	.331	.653
14	Browns	-180	1947	154	.383	59	95	5,145	564	1,238	189	52	90	526	583	15	663	69	49	5,819	1,801	331	76	118	.241	.320	.350	.670
15	Senators	-179	1947	154	.416	64	90	5,112	496	1,234	186	48	42	459	525	8	534	53	51	5,717	1,642	276	72	131	.241	.313	.321	.634
16	Browns	-178	1948	155	.386	59	94	5,303	671	1,438	251	62	63	625	578	19	571	63	44	6,013	2,002	376	113	131	.271	.345	.378	.722
17	Cubs	-177	1949	154	.396	61	93	5,214	593	1,336	212	53	97	539	396	26	573	53		5,723	1,945	362	87	121	.256	.312	.373	.685
18	Pirates	-176	1950	154	.373	57	96	5,327	681	1,404	227	59	138	634	564	31	693	43		5,976	2,163	424	54	142	.264	.338	.406	.744
19	Senators	-164	1942	151	.411	62	89	5,295	653	1,364	224	49	40	593	579	19	536	98	29	5,947	1,806	313	54	106	.258	.333	.341	.674
20	Reds	-162	1948	153	.418	64	89	5,127	588	1,266	221	37	104	548	477	16	582	42		5,699	1,873	362	79	120	.247	.313	.365	.678
21	Reds	-158	1945	154	.396	61	93	5,283	536	1,317	221	26	56	498	392	26	532	71		5,796	1,758	303	95	112	.249	.304	.333	.637
22	Cubs	-155	1947	155	.448	69	85	5,305	567	1,373	231	48	71	540	469	19	578	22		5,857	1,913	350	64	112	.259	.321	.361	.682
23	Athletics	-151	1946	155	.318	49	105	5,200	529	1,317	220	51	40	483	482	9	596	39	30	5,796	1,759	311	105	120	.253	.318	.338	.656
24	Giants	-151	1943	156	.359	55	98	5,290	559	1,309	153	33	81	518	479	24	466	35		5,896	1,771	267	103	147	.247	.313	.335	.648
25	Senators	-146	1940	154	.416	64	90	5,365	665	1,453	266	67	52	602	465	18	504	94	40	5,909	2,009	385	61	100	.271	.331	.374	.706