best win percent in a seasons including playoffs

The St. Louis Maroons have the best winning percentage by a team in a combined regular-season and postseason, winning 83.2 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	Maroons	.832	1884	94	19	114	4,285	887	1,251	259	41	32		181		542			4,466	1,688	332					.292		.394
2	White Stockings	.798	1880	67	17	86	3,135	538	876	164	39	4	378	104		217			3,239	1,130	207					.279		.360
3	White Stockings	.788	1876	52	14	66	2,748	624	926	131	32	8	441	70		45			2,818	1,145	171					.337		.417
4	White Stockings	.777	1885	87	25	113	4,093	834	1,079	184	75	54	606	340		429			4,433	1,575	313					.264		.385
5	Gothams	.759	1885	85	27	112	4,029	691	1,085	150	82	16	464	221		312			4,250	1,447	248					.269		.359
6	Grays	.750	1884	84	28	114	4,093	665	987	153	43	21	404	300		469			4,393	1,289	217					.241		.315
7	Cubs	.747	1906	118	40	161	5,202	722	1,352	190	71	20	550	466	47	544	292		5,959	1,744	281	244				.260	.326	.335	.662
8	Pirates	.741	1902	103	36	142	4,926	774	1,410	189	95	18	660	372	64	440	222		5,480	1,843	302	118				.286	.344	.374	.718
9	White Stockings	.726	1886	90	34	126	4,378	900	1,223	198	87	53	673	460		513	213		4,838	1,754	338					.279		.401
10	Yankees	.722	1927	114	44	159	5,490	999	1,682	297	105	160	926	655	23	635	92		6,374	2,669	562	206				.306	.383	.486	.869
11	Dodgers	.718	2020	56	22	78	2,644	450	676	130	8	148	424	311	37	638	39	9	3,012	1,266	286	4	16	11	54	.256	.340	.479	.819
12	Pirates	.717	1909	114	45	161	5,351	735	1,382	231	93	27	610	499	42	545	203		6,118	1,880	351	226				.258	.326	.351	.678
13	Yankees	.714	1998	125	50	175	6,070	1,027	1,734	309	32	221	965	715	61	1,120	165	68	6,946	2,770	562	37	63	39	159	.286	.363	.456	.820
14	Cubs	.712	1907	111	45	160	5,058	590	1,266	168	49	13	465	448	52	475	250		5,762	1,571	230	204				.250	.318	.311	.628
15	Yankees	.710	1939	110	45	156	5,431	987	1,548	263	56	173	922	710	36	563	72		6,271	2,442	492	94			100	.285	.371	.450	.821
16	Wolverines	.707	1886	87	36	126	4,501	829	1,260	176	81	53	636	374		426	194		4,875	1,757	310					.280		.390
17	Browns	.705	1885	79	33	112	3,972	677	979	132	57	17	450	234	49	282			4,255	1,276	206					.246	.297	.321	.618
18	Beaneaters	.705	1897	93	39	135	4,937	1,025	1,574	230	83	45	885	423	47	263	233		5,521	2,105	358	114				.319	.378	.426	.804
19	Browns	.704	1887	95	40	138	5,048	1,131	1,550	261	78	39	862	442	67	342	581		5,557	2,084	378					.307	.371	.413	.783
20	Brown Stockings	.703	1876	45	19	64	2,478	386	642	73	27	2	264	59		63			2,537	775	102					.259		.313
21	Indians	.703	1954	111	47	160	5,359	755	1,394	193	40	159	723	653	24	691	30	33	6,205	2,144	392	110	59		116	.260	.340	.400	.740
22	Yankees	.703	1932	111	47	160	5,620	1,039	1,609	285	82	168	990	788	31	552	77		6,516	2,562	535	77				.286	.377	.456	.833
23	Grays	.702	1879	59	25	85	3,392	612	1,003	142	55	12	405	91		172			3,483	1,291	209					.296		.381
24	Metropolitans	.701	1884	75	32	112	4,012	734	1,052	155	64	22		203	35	315			4,250	1,401	241					.262	.304	.349	.653
25	Red Caps	.700	1877	42	18	61	2,368	419	700	91	37	4	291	65		121			2,433	877	132					.296		.370