Between the 1970 and 1979 seasons, the Cincinnati Reds had the highest winning percentage by a team, winning 59.2 percent of the time.

	TEAM	W%	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	Reds	.592	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
2	Orioles	.590	944	656	1,600	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
3	Pirates	.569	916	695	1,612	55,933	7,276	15,031	2,489	534	1,306	6,778	4,601	338	8,577	1,090	505	61,981	22,506	4,329	629	480	747	1,176	.269	.325	.402	.728
4	Dodgers	.565	910	701	1,612	55,001	6,960	14,405	2,185	351	1,261	6,531	5,455	251	8,114	1,193	528	62,061	21,075	3,797	872	482	717	1,215	.262	.329	.383	.712
5	Red Sox	.556	895	714	1,609	54,750	7,559	14,579	2,577	384	1,591	7,128	5,505	335	8,215	746	484	61,678	22,697	4,552	565	523	459	1,354	.266	.334	.415	.749
6	Yankees	.555	892	715	1,608	54,668	6,908	14,366	2,219	355	1,232	6,507	5,167	287	6,876	872	505	61,147	20,991	3,806	524	501	458	1,258	.263	.327	.384	.711
7	Royals	.528	851	760	1,611	54,807	7,055	14,404	2,530	519	1,001	6,600	5,355	308	7,283	1,529	716	61,597	20,975	4,050	585	542	472	1,180	.263	.329	.383	.712
8	Athletics	.520	838	772	1,610	53,703	6,574	13,274	2,011	309	1,333	6,097	5,384	370	8,801	1,538	799	60,642	19,902	3,653	759	426	461	1,118	.247	.318	.371	.688
9	Twins	.506	812	794	1,607	55,181	7,110	14,799	2,264	416	1,112	6,637	5,415	370	7,992	834	517	62,229	21,231	3,792	801	462	510	1,346	.268	.335	.385	.720
10	Phillies	.503	812	801	1,614	54,859	6,716	14,059	2,390	436	1,224	6,264	5,329	328	9,017	1,011	587	61,665	20,993	4,050	653	496	670	1,109	.256	.323	.383	.706
11	Cardinals	.496	800	813	1,616	55,512	6,730	14,726	2,389	494	855	6,236	4,936	276	7,942	1,203	583	61,891	20,668	3,738	692	475	684	1,331	.265	.326	.372	.698
12	Giants	.493	794	818	1,612	54,458	6,784	13,724	2,237	397	1,254	6,252	5,825	293	8,927	1,030	499	61,775	20,517	3,888	785	414	663	1,186	.252	.325	.377	.702
13	Astros	.493	793	817	1,611	54,715	6,528	13,953	2,282	474	961	6,052	5,003	287	8,340	1,364	606	61,204	20,066	3,717	771	428	637	1,188	.255	.318	.367	.685
14	Tigers	.490	789	820	1,609	54,441	6,564	13,847	2,058	366	1,422	6,156	5,047	315	7,853	672	448	60,783	20,903	3,846	549	431	412	1,361	.254	.319	.384	.703
15	Cubs	.487	785	827	1,613	54,788	6,796	14,139	2,248	374	1,185	6,306	5,609	274	8,083	683	510	61,928	20,690	3,807	801	456	664	1,276	.258	.328	.378	.705
16	Angels	.484	781	831	1,613	54,292	6,253	13,627	2,073	319	997	5,812	5,061	371	8,244	1,067	623	60,942	19,329	3,389	774	444	456	1,265	.251	.317	.356	.673
17	Mets	.473	763	850	1,614	54,416	6,039	13,322	2,094	334	955	5,575	5,595	294	8,685	749	504	61,523	18,949	3,383	813	405	579	1,357	.245	.316	.348	.665
18	White Sox	.469	752	853	1,608	54,542	6,601	14,146	2,183	349	1,207	6,140	5,110	362	8,041	826	557	61,084	20,648	3,739	602	468	417	1,299	.259	.324	.379	.703
19	Rangers	.465	747	860	1,608	54,320	6,472	13,712	2,086	287	1,110	6,046	5,586	327	8,334	1,088	627	61,412	19,702	3,483	725	454	467	1,281	.252	.323	.363	.686
20	Expos	.465	748	862	1,611	54,230	6,283	13,445	2,231	324	1,120	5,809	5,341	369	8,632	868	521	61,245	19,684	3,675	921	384	630	1,200	.248	.318	.363	.681
21	Indians	.460	737	866	1,603	54,251	6,384	13,801	2,029	292	1,254	5,960	4,973	289	7,558	745	660	60,657	20,176	3,575	709	435	376	1,305	.254	.318	.372	.690
22	Brewers	.458	738	873	1,612	54,065	6,490	13,607	2,209	355	1,300	6,103	5,246	289	8,906	860	622	60,802	20,426	3,864	789	413	389	1,182	.252	.319	.378	.697
23	Braves	.451	725	883	1,611	54,669	6,617	13,902	1,992	287	1,360	6,188	5,376	263	8,033	717	466	61,480	20,548	3,639	759	413	586	1,284	.254	.322	.376	.698
24	Padres	.415	667	942	1,609	54,151	5,752	13,066	2,031	361	1,011	5,336	4,976	273	9,117	943	498	60,732	18,852	3,403	991	341	588	1,096	.241	.307	.348	.655
25	Mariners	.386	187	297	484	16,362	1,949	4,215	697	122	362	1,836	1,463	85	2,196	359	166	18,269	6,242	1,181	210	149	92	384	.258	.319	.381	.701