worst run differential in a mlb season by a team over.520 since 1901

Since 1901, the Seattle Mariners have the lowest run differential by a team in a season, with a differential of -52 runs in 2009.

Interpreted as:

worst run differential in a MLB season by a team over.520 WIN% since 1901

	TEAM	DIFF	W%	SEASON	W	L	G	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	-52	.525	2009	85	77	162	5,543	640	1,430	280	19	160	613	421	49	1,093	89	33	6,113	2,228	459	56	44	39	124	.258	.314	.402	.716
2	Mariners	-51	.556	2021	90	72	162	5,355	697	1,209	233	11	199	673	535	72	1,492	64	24	6,007	2,061	443	9	36	8	92	.226	.303	.385	.688
3	Mets	-50	.532	1972	83	73	156	5,135	528	1,154	175	31	105	490	589	34	990	41	41	5,883	1,706	311	86	39	70	127	.225	.307	.332	.639
4	Cardinals	-36	.539	1917	82	70	154	5,083	531	1,271	159	93	26	436	359	24	652	159		5,626	1,694	278	160				.250	.303	.333	.636
5	Senators	-35	.523	1921	80	73	154	5,292	703	1,470	242	97	42	609	457	58	466	112	66	5,992	2,032	381	185				.278	.342	.384	.726
6	Mariners	-34	.549	2018	89	73	162	5,513	677	1,402	256	32	176	644	430	70	1,221	79	37	6,083	2,250	464	29	41	17	128	.254	.314	.408	.722
7	Tigers	-32	.525	1973	85	77	162	5,508	642	1,400	213	32	157	592	509	39	722	28	30	6,135	2,148	402	48	31	47	147	.254	.320	.390	.710
8	Astros	-31	.534	2008	86	75	161	5,451	712	1,432	284	22	167	684	449	52	1,051	114	52	6,050	2,261	473	57	41	42	116	.263	.323	.415	.737
9	Indians	-25	.526	1930	81	73	154	5,439	890	1,654	356	60	72	830	481	26	460	51	47	6,120	2,346	488	174				.304	.363	.431	.795
10	Mets	-24	.556	1984	90	72	162	5,438	652	1,400	235	25	107	607	500	20	1,001	149	54	6,066	2,006	367	59	49	73	132	.257	.320	.369	.689
11	Robins	-24	.526	1915	80	72	154	5,120	536	1,268	165	75	14	449	313	27	496	131	126	5,635	1,625	254	175				.248	.295	.317	.612
12	Astros	-22	.531	1989	86	76	162	5,516	647	1,316	239	28	97	598	530	27	860	144	62	6,200	1,902	364	83	44	62	80	.239	.306	.345	.651
13	Yankees	-21	.525	2013	85	77	162	5,449	650	1,321	247	24	144	614	466	57	1,214	115	31	6,044	2,048	415	36	36	33	121	.242	.307	.376	.683
14	White Sox	-21	.532	1943	82	72	155	5,254	573	1,297	193	46	33	508	561	22	582	173	87	5,909	1,681	272	72			110	.247	.322	.320	.642
15	Indians	-21	.533	1929	81	71	152	5,191	717	1,521	290	79	62	682	447	26	348	75	86	5,873	2,155	431	209				.293	.352	.415	.767
16	Diamondbacks	-20	.556	2007	90	72	162	5,398	712	1,350	286	40	171	687	532	57	1,111	109	24	6,100	2,229	497	55	58	38	121	.250	.321	.413	.734
17	Twins	-20	.525	1987	85	77	162	5,441	786	1,422	258	35	196	733	523	38	898	113	65	6,088	2,338	489	47	39	45	128	.261	.328	.430	.758
18	Angels	-20	.522	1967	84	77	161	5,307	567	1,265	170	37	114	524	453	31	1,021	40	36	5,902	1,851	321	88	23	49	114	.238	.301	.349	.650
19	Mariners	-19	.543	2007	88	74	162	5,684	794	1,629	284	22	153	754	389	62	861	81	30	6,208	2,416	459	33	40	32	154	.287	.337	.425	.762
20	Naps	-17	.523	1911	80	73	156	5,321	692	1,501	238	81	20	579	354	50	647	209		5,885	1,961	339	160				.282	.333	.369	.701
21	Angels	-14	.525	2015	85	77	162	5,417	661	1,331	243	21	176	621	435	58	1,150	52	34	5,987	2,144	440	37	40	34	116	.246	.307	.396	.702
22	Giants	-14	.537	1982	87	75	162	5,499	673	1,393	213	30	133	631	607	17	915	130	56	6,227	2,065	376	59	45	70	131	.253	.327	.376	.703
23	Phillies	-13	.528	1965	85	76	162	5,528	654	1,380	205	53	144	608	494	36	1,091	46	32	6,172	2,123	402	75	39	60	115	.250	.313	.384	.697
24	Blue Jays	-10	.533	2020	32	28	60	2,023	302	516	104	4	88	288	203	12	508	33	6	2,260	892	196	8	14	4	39	.255	.325	.441	.766
25	Pirates	-10	.558	1932	86	68	154	5,421	701	1,543	274	90	48	653	358	31	385	71		5,906	2,141	412	96				.285	.333	.395	.727