highest win percentage by a team in a decade since 900 mlb

The Milwaukee Brewers have the highest winning percentage by a team in a decade, winning 66.7 percent of the time in the 1880s.

	TEAM	W%	DECADE	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	Brewers	.667	1880s	8	4	12	395	53	88	25	0	0		20		70			415	113	25					.223		.286
2	Reds	.659	1890s	174	90	269	9,515	2,020	2,647	386	176	106	1,548	1,303	109	499	859		10,927	3,703	668					.278	.371	.389	.761
3	Outlaw Reds	.657	1880s	69	36	105	3,786	703	1,027	118	63	26		147		482			3,933	1,349	207					.271		.356
4	Browns	.657	1880s	618	323	955	34,035	6,104	8,936	1,315	478	199	3,301	2,387	172		1,721		36,734	11,804	1,992					.263	.317	.347	.664
5	Red Caps	.642	1870s	176	98	275	10,527	1,750	2,841	400	137	35		248					10,775	3,620	572					.270		.344
6	Grays	.639	1870s	92	52	147	5,690	965	1,607	249	85	20		141					5,831	2,086	354					.282		.367
7	Yankees	.636	1930s	970	554	1,541	54,172	9,695	15,596	2,715	750	1,546	9,070	7,025	281	5,587	822		62,323	24,449	5,011	845			99	.288	.373	.451	.824
8	White Stockings	.636	1880s	691	395	1,103	39,600	7,353	10,880	1,860	661	529	3,208	2,794	78		1,125		42,472	15,649	3,050					.275	.324	.395	.719
9	Pirates	.636	1900s	938	538	1,494	50,241	6,986	13,445	1,795	925	225	5,698	4,014	476	4,493	1,948		56,229	17,765	2,945	1,498				.268	.328	.354	.681
10	Dodgers	.633	2020s	551	319	870	29,540	4,599	7,501	1,521	128	1,293	4,421	3,274	395	7,301	521	116	33,559	13,157	2,942	66	284	160	532	.254	.334	.445	.779
11	Beaneaters	.631	1890s	869	508	1,395	49,644	9,231	14,245	1,980	698	513	7,709	4,863	530	2,928	2,429		55,727	19,160	3,191	690				.287	.357	.386	.743
12	Cardinals	.623	1940s	960	580	1,560	54,333	7,443	14,767	2,610	594	886	6,894	5,358	240	5,107	474		61,045	21,223	4,090	1,114			1,033	.272	.340	.391	.730
13	Yankees	.621	1950s	955	582	1,541	52,686	7,832	14,139	2,112	528	1,527	7,333	5,936	314	6,693	487	320	60,024	21,888	4,167	833	255	230	1,089	.268	.344	.415	.760
14	Dark Blues	.619	1870s	78	48	129	5,022	770	1,348	159	53	6		69					5,091	1,631	218					.268		.325
15	Giants	.614	1880s	503	316	848	29,909	5,016	7,921	1,118	533	238	2,875	2,003	103		1,176		32,015	10,819	1,889					.265	.313	.362	.675
16	Yankees	.608	1920s	933	602	1,540	52,872	8,487	15,385	2,584	802	1,211	7,824	5,462	281	5,379	695		60,413	23,206	4,597	1,798				.291	.360	.439	.799
17	Grays	.605	1880s	346	226	578	20,882	3,072	5,157	835	256	78	292	1,051					21,933	6,738	1,169					.247		.323
18	Yankees	.604	1940s	929	609	1,544	52,791	7,631	13,957	2,236	634	1,208	7,145	6,208	291	5,781	537		60,117	21,085	4,078	827			1,198	.264	.345	.399	.744
19	Browns	.599	1890s	163	109	278	9,742	1,829	2,619	343	124	105	1,356	1,086	181	436	586		11,009	3,525	572					.269	.353	.362	.715
20	Giants	.598	1910s	889	597	1,507	49,907	6,549	13,343	2,015	734	338	5,579	4,140	545	4,882	2,293		56,004	17,840	3,087	1,412				.267	.330	.357	.688
21	Cubs	.598	1900s	879	592	1,502	49,666	6,247	12,627	1,735	593	172	4,951	3,904	484	4,945	2,292		55,799	16,064	2,500	1,745				.254	.315	.323	.638
22	Yankees	.597	2000s	965	651	1,618	56,090	8,834	15,502	3,008	201	2,167	8,489	6,265	711	10,299	1,117	374	63,805	25,413	5,376	296	443	409	1,409	.276	.354	.453	.807
23	Braves	.595	1990s	925	629	1,554	52,825	7,297	13,825	2,526	292	1,698	6,896	5,269	376	9,603	1,066	523	59,623	22,029	4,516	719	434	456	1,135	.262	.331	.417	.748
24	Reds	.592	1970s	953	657	1,611	54,911	7,525	14,406	2,527	391	1,439	7,004	6,145	287	9,222	1,392	514	62,501	22,032	4,357	679	479	706	1,182	.262	.337	.401	.738
25	Dodgers	.592	1950s	913	630	1,549	52,734	7,850	14,002	2,207	444	1,772	7,343	6,121	320	7,336	753	430	60,266	22,413	4,423	828	263	282	1,345	.266	.344	.425	.769