highest mlb team win percentage in a single season from 1954 to 1960

Between the 1954 and 1960 seasons, the Cleveland Indians had the best winning percentage by a team in a season, winning 72.1 percent of the time in 1954.

	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	Indians	.721	1954	111	43	156	5,222	746	1,368	188	39	156	714	637	23	668	30	33	6,048	2,102	383	107	59		114	.262	.341	.403	.744
2	Yankees	.669	1954	103	51	155	5,226	805	1,400	215	59	133	747	650	20	632	34	41	6,027	2,132	407	84	47		94	.268	.348	.408	.756
3	Dodgers	.641	1955	98	55	154	5,193	857	1,406	230	44	201	800	674	41	718	79	56	6,037	2,327	475	75	54	62	132	.271	.356	.448	.804
4	Yankees	.636	1957	98	56	154	5,271	723	1,412	200	54	145	680	561	24	707	49	38	5,992	2,155	399	93	43	66	128	.268	.339	.409	.747
5	Yankees	.630	1960	97	57	155	5,290	746	1,377	215	40	193	699	537	28	818	37	23	5,981	2,251	448	81	45	41	112	.260	.329	.426	.755
6	Yankees	.630	1956	97	57	154	5,312	857	1,433	193	55	190	788	615	30	755	51	37	6,075	2,306	438	82	36	40	102	.270	.347	.434	.781
7	Giants	.630	1954	97	57	154	5,245	732	1,386	194	42	186	701	522	33	561	30	23	5,936	2,222	422	84	52		110	.264	.332	.424	.755
8	Yankees	.623	1955	96	58	154	5,161	761	1,342	179	55	175	717	607	46	655	55	25	5,942	2,156	409	79	49	48	99	.260	.340	.418	.758
9	Pirates	.617	1960	95	59	155	5,406	734	1,493	236	56	120	689	486	20	747	34	24	6,029	2,201	412	69	48	71	119	.276	.335	.407	.743
10	Braves	.617	1957	95	59	155	5,458	772	1,469	221	62	199	722	461	30	729	35	16	6,050	2,411	482	64	37	66	107	.269	.327	.442	.769
11	White Sox	.610	1959	94	60	156	5,297	669	1,325	220	46	97	620	580	49	634	113	53	6,054	1,928	363	84	44	45	107	.250	.327	.364	.691
12	White Sox	.610	1954	94	60	155	5,168	711	1,382	203	47	94	655	604	51	536	98	58	5,972	1,961	344	96	53		128	.267	.347	.379	.726
13	Dodgers	.604	1956	93	61	154	5,098	720	1,315	212	36	179	680	649	17	738	65	37	5,884	2,136	427	86	34	91	146	.258	.342	.419	.761
14	Indians	.604	1955	93	61	154	5,146	698	1,325	195	31	148	657	723	35	715	28	24	6,050	2,026	374	87	59	36	112	.257	.349	.394	.743
15	Braves	.597	1958	92	62	154	5,225	675	1,388	221	21	167	641	478	36	646	26	8	5,859	2,152	409	79	41	68	132	.266	.329	.412	.741
16	Yankees	.597	1958	92	62	155	5,294	759	1,418	212	39	164	717	537	26	818	48	32	5,971	2,200	415	72	42	39	107	.268	.336	.416	.751
17	Braves	.597	1956	92	62	155	5,207	709	1,350	212	54	177	667	486	20	714	29	20	5,897	2,201	443	142	42	76	99	.259	.323	.423	.745
18	Dodgers	.597	1954	92	62	154	5,251	778	1,418	246	56	186	741	634	35	625	46	39	6,058	2,334	488	79	59		137	.270	.349	.444	.794
19	Redlegs	.591	1956	91	63	155	5,291	775	1,406	201	32	221	734	528	51	760	45	22	6,003	2,334	454	90	43	69	112	.266	.336	.441	.777
20	White Sox	.591	1955	91	63	155	5,220	725	1,401	204	36	116	677	568	58	595	69	45	6,000	2,025	356	111	43	40	117	.268	.344	.388	.732
21	White Sox	.584	1957	90	64	155	5,265	707	1,369	208	41	106	670	632	68	744	109	51	6,082	1,977	355	75	42	33	120	.260	.344	.375	.720
22	Orioles	.578	1960	89	65	154	5,170	682	1,307	206	33	123	640	596	36	800	37	24	5,911	1,948	362	72	37	36	127	.253	.332	.377	.709
23	Indians	.578	1959	89	65	154	5,288	745	1,390	216	25	167	682	433	39	721	33	36	5,860	2,157	408	60	40	25	119	.263	.321	.408	.729
24	Braves	.578	1954	89	65	154	5,261	670	1,395	217	41	139	636	471	35	619	54	31	5,921	2,111	397	110	44		115	.265	.327	.401	.728
25	Braves	.571	1960	88	66	154	5,263	724	1,393	198	48	170	681	463	23	793	69	37	5,868	2,197	416	59	60	53	101	.265	.323	.417	.741