best single season mlb record based on winning percentages after 1975

Since 1976, the Los Angeles Dodgers have the best record by a team in a season, with a record of 43-17 in 2020.

	TEAM	REC	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	Dodgers	43-17	.717	2020	43	17	60	2,042	349	523	97	6	118	327	228	30	471	29	8	2,315	986	221	3	12	7	46	.256	.338	.483	.821
2	Mariners	116-46	.716	2001	116	46	162	5,680	927	1,637	310	38	169	881	614	62	989	174	42	6,474	2,530	517	48	70	54	112	.288	.360	.445	.805
3	Yankees	114-48	.704	1998	114	48	162	5,643	965	1,625	290	31	207	907	653	57	1,025	153	63	6,444	2,598	528	32	59	34	145	.288	.364	.460	.825
4	Indians	100-44	.694	1995	100	44	144	5,028	840	1,461	279	23	207	803	542	35	766	132	53	5,684	2,407	509	31	48	40	128	.291	.361	.479	.839
5	Dodgers	111-51	.685	2022	111	51	162	5,526	847	1,418	325	31	212	812	607	56	1,374	98	18	6,245	2,441	568	3	53	22	85	.257	.333	.442	.775
6	Rays	40-20	.667	2020	40	20	60	1,975	289	470	105	12	80	274	243	28	608	48	9	2,260	839	197	0	14	9	38	.238	.328	.425	.753
7	Red Sox	108-54	.667	2018	108	54	162	5,623	876	1,509	355	31	208	829	569	55	1,253	125	31	6,302	2,550	594	7	48	38	130	.268	.339	.453	.792
8	Mets	108-54	.667	1986	108	54	162	5,558	783	1,462	261	31	148	730	631	31	968	118	48	6,348	2,229	440	75	53	68	122	.263	.339	.401	.740
9	Giants	107-55	.660	2021	107	55	162	5,462	804	1,360	271	25	241	768	602	64	1,461	66	14	6,194	2,404	537	36	30	45	117	.249	.329	.440	.769
10	Astros	107-55	.660	2019	107	55	162	5,613	920	1,538	323	28	288	891	645	66	1,166	67	27	6,391	2,781	639	10	57	17	146	.274	.352	.495	.848
11	Astros	106-56	.654	2022	106	56	162	5,409	737	1,341	284	13	214	715	528	60	1,179	83	22	6,048	2,293	511	9	42	18	118	.248	.319	.424	.743
12	Dodgers	106-56	.654	2021	106	56	162	5,445	830	1,330	247	24	237	799	613	104	1,408	65	17	6,239	2,336	508	32	45	36	96	.244	.330	.429	.759
13	Dodgers	106-56	.654	2019	106	56	162	5,493	886	1,414	302	20	279	861	607	81	1,356	57	10	6,281	2,593	601	55	45	47	100	.257	.338	.472	.810
14	Braves	106-56	.654	1998	106	56	162	5,484	826	1,489	297	26	215	794	548	61	1,062	98	43	6,215	2,483	538	76	46	37	104	.272	.342	.453	.795
15	Expos	74-40	.649	1994	74	40	114	4,000	585	1,111	246	30	108	542	379	40	669	137	36	4,514	1,741	384	53	42	39	77	.278	.343	.435	.778
16	Cardinals	105-57	.648	2004	105	57	162	5,555	855	1,544	319	24	214	817	548	51	1,085	111	47	6,297	2,553	557	73	70	64	121	.278	.344	.460	.804
17	Dodgers	104-58	.642	2017	104	58	162	5,408	770	1,347	312	20	221	730	649	64	1,380	77	28	6,190	2,362	553	31	38	41	119	.249	.334	.437	.771
18	Braves	104-58	.642	1993	104	58	162	5,515	767	1,444	239	29	169	712	560	36	946	125	48	6,234	2,248	437	73	50	46	127	.262	.331	.408	.739
19	Athletics	104-58	.642	1988	104	58	162	5,602	800	1,474	251	22	156	752	580	65	926	129	54	6,356	2,237	429	54	55	29	142	.263	.336	.399	.736
20	Tigers	104-58	.642	1984	104	58	162	5,644	829	1,529	254	46	187	788	602	34	941	106	68	6,373	2,436	487	48	45	51	102	.271	.342	.432	.774
21	Orioles	102-57	.642	1979	102	57	159	5,371	757	1,401	258	24	181	717	608	31	847	99	49	6,106	2,250	463	42	54	52	143	.261	.336	.419	.755
22	Braves	104-58	.642	2023	104	58	162	5,597	947	1,543	293	23	307	916	538	67	1,289	132	27	6,247	2,803	623	2	43	20	128	.276	.344	.501	.845
23	Cubs	103-58	.640	2016	103	58	162	5,503	808	1,409	293	30	199	767	656	96	1,339	66	34	6,334	2,359	522	42	37	45	107	.256	.343	.429	.772
24	Yankees	103-58	.640	2002	103	58	161	5,601	897	1,540	314	12	223	857	640	72	1,171	100	38	6,377	2,547	549	23	41	48	150	.275	.354	.455	.809
25	Yankees	103-59	.636	2019	103	59	162	5,583	943	1,493	290	17	306	904	569	49	1,437	55	22	6,244	2,735	613	10	33	18	113	.267	.339	.490	.829