what was the worst win% in a season in mlb history

The Wilmington Quicksteps have the lowest winning percentage by a team in a season, winning 11.1 percent of the time in 1884.

	TEAM	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	Quicksteps	.111	1884	2	16	18	521	35	91	8	8	2		22		123			543	121	18					.175		.232
2	Spiders	.130	1899	20	134	154	5,279	529	1,333	142	50	12	454	289	65	280	127		5,690	1,611	204	57				.253	.299	.305	.605
3	Reds	.138	1876	9	56	65	2,372	238	555	51	12	4	132	41		136			2,413	642	67					.234		.271
4	Alleghenys	.169	1890	23	113	138	4,739	597	1,088	160	43	20	426	408	66	460	208		5,213	1,394	223					.230	.300	.294	.594
5	Quakers	.173	1883	17	81	99	3,576	437	859	181	48	3	299	141		355			3,717	1,145	232					.240		.320
6	Nationals	.190	1884	12	51	63	2,166	248	434	61	24	6		100	16	377			2,282	561	91					.200	.241	.259	.500
7	Colonels	.196	1889	27	111	140	4,955	632	1,249	170	75	22	503	320	41	521	203		5,316	1,635	267					.252	.303	.330	.633
8	Cowboys	.203	1884	16	63	82	2,802	311	557	104	15	6		123		529			2,925	709	125					.199		.253
9	Ruby Legs	.214	1882	18	66	84	2,984	379	689	109	57	16	275	113		303			3,097	960	182					.231		.322
10	Browns	.221	1897	29	102	133	4,673	592	1,285	151	67	32	496	354	76	314	172		5,183	1,666	250	80				.275	.336	.357	.693
11	Nationals	.233	1886	28	92	125	4,082	445	856	135	51	23	331	265		582	143		4,347	1,162	209					.210		.285
12	Athletics	.235	1916	36	117	154	5,010	447	1,212	169	65	19	380	406	30	631	151		5,603	1,568	253	157				.242	.303	.313	.616
13	Athletics	.237	1876	14	45	60	2,387	378	646	79	35	7	249	27		36			2,414	816	121					.271		.342
14	Mountain City	.240	1884	6	19	25	899	90	223	30	6	2		22		130			921	271	38					.248		.301
15	Cowboys	.248	1886	30	91	126	4,236	494	967	177	48	19	370	269		608	96		4,505	1,297	244					.228		.306
16	Braves	.248	1935	38	115	153	5,309	575	1,396	233	33	75	544	353	19	436	20		5,761	1,920	341	80			139	.263	.311	.362	.673
17	Mets	.250	1962	40	120	161	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
18	Wolverines	.250	1884	28	84	114	3,970	445	825	114	47	31	297	207		699			4,177	1,126	192					.208		.284
19	Saints	.250	1884	2	6	9	272	24	49	13	1	0		7		47			279	64	14					.180		.235
20	Grays	.250	1878	15	45	61	2,212	256	552	65	20	2	177	69		214			2,281	663	87					.250		.300
21	Senators	.252	1904	38	113	157	5,149	437	1,170	171	57	10	348	283	59	756	150		5,606	1,485	238	115				.227	.275	.288	.564
22	White Sox	.253	2024	41	121	162	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
23	Trojans	.253	1879	19	56	77	2,841	321	673	102	24	4	206	45		182			2,886	835	130					.237		.294
24	Rockies	.254	2025	30	88	118	3,964	438	940	194	29	120	427	307	35	1,115	62	29	4,340	1,552	343	14	20	5	90	.237	.296	.392	.688
25	Athletics	.257	1919	36	104	140	4,730	459	1,156	175	71	35	396	349	30	565	103		5,234	1,578	281	125				.244	.300	.334	.634