highest winning percentage by a team in a decade at least 810 games played

The St. Louis Browns have the best winning percentage by a team with 810+ games played in a decade, winning 65.7 percent of the time in the 1880s.

	TEAM	W%	G	DECADE	W	L	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Browns	.657	955	1880s	618	323	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
2	Yankees	.636	1,541	1930s	970	554	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
3	White Stockings	.636	1,103	1880s	691	395	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
4	Pirates	.636	1,494	1900s	938	538	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
5	Dodgers	.633	870	2020s	551	319	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
6	Beaneaters	.631	1,395	1890s	869	508	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
7	Cardinals	.623	1,560	1940s	960	580	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
8	Yankees	.621	1,541	1950s	955	582	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
9	Giants	.614	848	1880s	503	316	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
10	Yankees	.608	1,540	1920s	933	602	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
11	Yankees	.604	1,544	1940s	929	609	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
12	Giants	.598	1,507	1910s	889	597	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
13	Cubs	.598	1,502	1900s	879	592	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
14	Yankees	.597	1,618	2000s	965	651	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
15	Braves	.595	1,554	1990s	925	629	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
16	Reds	.592	1,611	1970s	953	657	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
17	Dodgers	.592	1,549	1950s	913	630	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
18	Orioles	.590	1,600	1970s	944	656	54,166	6,902	13,790	2,242	283	1,398	6,450	5,872	365	8,626	1,037	517	61,460	20,792	3,923	605	452	525	1,244	.255	.329	.384	.713
19	Indians	.588	1,545	1950s	904	634	52,304	7,312	13,571	2,049	334	1,537	6,899	6,089	323	7,156	392	324	59,806	20,899	3,920	805	285	159	1,196	.259	.339	.400	.738
20	Giants	.582	1,536	1920s	890	639	53,651	8,005	15,637	2,448	703	931	7,316	4,440	308	4,398	965		59,829	22,284	4,082	1,430				.291	.349	.415	.764
21	Red Stockings	.581	957	1880s	549	396	34,173	5,964	8,817	1,087	669	267	3,062	2,101	176		1,643		36,618	12,043	2,023					.258	.308	.352	.660
22	Dodgers	.581	1,554	1940s	894	646	53,623	7,537	14,349	2,546	547	789	6,937	6,057	218	5,287	772		60,986	20,356	3,882	1,088			1,038	.268	.344	.380	.724
23	Orioles	.579	1,294	1890s	730	530	45,361	8,530	13,521	1,814	865	218	6,940	4,345	992	2,952	2,993		51,317	17,719	2,897	619				.298	.372	.391	.763
24	Cubs	.579	1,544	1930s	889	646	53,966	7,747	15,240	2,796	597	913	7,237	4,868	296	5,353	593		60,356	21,969	4,306	1,226			124	.282	.345	.407	.752
25	Red Sox	.579	1,507	1910s	857	624	48,995	6,145	12,720	2,030	722	232	5,170	4,792	446	5,189	1,505		56,396	16,890	2,984	2,163				.260	.331	.345	.676