which mlb team had the worst run differential season in since 1940

Since 1940, the Colorado Rockies have the lowest run differential by a team in a season, with a differential of -424 runs this season.

	TEAM	DIFF	SEASON	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	Rockies	-424	2025	162	.265	43	119	5,408	597	1,281	253	37	160	581	395	48	1,531	87	39	5,907	2,088	450	21	35	5	118	.237	.293	.386	.679
2	Athletics	-339	2023	162	.309	50	112	5,311	585	1,187	225	21	171	563	498	85	1,496	149	31	5,958	1,967	417	28	36	12	125	.223	.298	.370	.669
3	Tigers	-337	2003	162	.265	43	119	5,466	591	1,312	201	39	153	553	443	47	1,099	98	63	6,070	2,050	393	65	49	24	114	.240	.300	.375	.675
4	Tigers	-333	2019	161	.292	47	114	5,549	582	1,333	292	41	149	556	391	48	1,595	57	20	6,039	2,154	482	9	42	14	108	.240	.294	.388	.682
5	Athletics	-333	1954	156	.331	51	103	5,206	542	1,228	191	41	94	503	504	28	677	30	29	5,823	1,783	326	54	31		106	.236	.305	.342	.648
6	Mets	-331	1962	161	.250	40	120	5,492	617	1,318	166	40	139	573	616	32	991	59	48	6,242	1,981	345	58	44	29	122	.240	.318	.361	.679
7	Tigers	-320	1996	162	.327	53	109	5,530	783	1,413	257	21	204	741	546	29	1,268	87	50	6,202	2,324	482	48	49	26	132	.256	.323	.420	.743
8	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
9	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
10	White Sox	-306	2024	162	.253	41	121	5,383	507	1,187	226	9	133	485	395	43	1,403	90	33	5,866	1,830	368	18	27	8	116	.221	.278	.340	.618
11	Orioles	-297	2021	162	.321	52	110	5,420	659	1,296	266	15	195	632	451	65	1,454	54	23	5,981	2,177	476	14	31	12	105	.239	.304	.402	.705
12	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
13	Tigers	-289	2002	161	.342	55	106	5,406	575	1,340	265	37	124	546	363	64	1,035	65	44	5,920	2,051	426	30	57	22	125	.248	.300	.379	.679
14	Padres	-289	1974	162	.370	60	102	5,415	541	1,239	196	27	99	506	564	20	900	85	45	6,117	1,786	322	83	35	52	105	.229	.302	.330	.632
15	Pirates	-288	1954	154	.344	53	101	5,088	557	1,260	181	57	76	526	566	25	737	21	13	5,836	1,783	314	99	58		125	.248	.323	.350	.673
16	Athletics	-287	1979	162	.333	54	108	5,348	573	1,276	188	32	108	541	482	20	751	104	69	5,971	1,852	328	75	46	36	131	.239	.302	.346	.648
17	Diamondbacks	-284	2004	162	.315	51	111	5,544	615	1,401	295	38	135	582	441	35	1,022	53	32	6,113	2,177	468	56	37	38	137	.253	.310	.393	.703
18	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
19	Pirates	-279	2010	162	.352	57	105	5,386	587	1,303	276	27	126	570	463	33	1,207	87	36	5,973	2,011	429	58	33	28	119	.242	.304	.373	.678
20	Padres	-278	1969	162	.321	52	110	5,357	468	1,203	180	42	99	431	423	35	1,143	45	44	5,891	1,764	321	56	20	40	122	.225	.285	.329	.614
21	Pirates	-278	1952	155	.273	42	112	5,193	515	1,201	181	30	92	478	486	26	724	43	41	5,775	1,718	303	70			104	.231	.300	.331	.631
22	Mets	-273	1963	162	.315	51	111	5,336	501	1,168	156	35	96	459	457	47	1,078	41	52	5,921	1,682	287	46	35	41	106	.219	.285	.315	.600
23	Athletics	-273	1955	155	.409	63	91	5,335	638	1,395	189	46	121	592	462	26	718	22	36	5,915	2,039	356	58	34	34	146	.261	.321	.382	.704
24	Senators	-272	1956	155	.383	59	95	5,202	652	1,302	198	62	112	612	690	41	877	37	34	6,043	1,960	372	75	35	42	142	.250	.341	.377	.717
25	Browns	-271	1951	154	.338	52	102	5,219	611	1,288	223	47	86	555	521	16	692	35	38	5,848	1,863	356	92			151	.247	.317	.357	.674