The Pittsburgh Pirates had the worst winning percentage by a team in 2020, winning 31.7 percent of the time.

	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	Pirates	.317	2020	19	41	60	1,932	219	425	76	6	59	210	167	11	521	16	11	2,132	690	141	7	15	6	34	.220	.284	.357	.641
2	Rangers	.367	2020	22	38	60	1,936	224	420	80	9	62	204	167	24	548	49	14	2,147	704	151	2	18	3	33	.217	.285	.364	.648
3	Tigers	.397	2020	23	35	58	1,893	249	463	78	12	62	242	147	19	567	19	6	2,074	751	152	1	14	1	42	.245	.303	.397	.700
4	Red Sox	.400	2020	24	36	60	2,083	292	552	118	7	81	278	187	21	545	31	9	2,304	927	206	4	9	8	51	.265	.330	.445	.775
5	Orioles	.417	2020	25	35	60	2,026	274	523	102	7	77	264	164	27	514	19	14	2,242	870	186	15	10	5	32	.258	.321	.429	.750
6	Diamondbacks	.417	2020	25	35	60	1,997	269	482	101	12	58	255	181	36	461	23	7	2,238	781	171	1	23	5	37	.241	.312	.391	.704
7	Angels	.433	2020	26	34	60	2,020	294	501	97	8	85	285	239	25	490	21	8	2,308	869	190	6	18	8	49	.248	.332	.430	.763
8	Mets	.433	2020	26	34	60	2,023	286	551	106	7	86	278	197	45	498	20	10	2,279	929	199	1	13	8	53	.272	.348	.459	.807
9	Royals	.433	2020	26	34	60	1,988	248	485	97	7	68	237	172	18	527	49	20	2,196	800	172	8	10	3	28	.244	.309	.402	.711
10	Nationals	.433	2020	26	34	60	1,968	293	519	112	12	66	279	192	32	451	33	12	2,218	853	190	5	21	16	42	.264	.336	.433	.769
11	Rockies	.433	2020	26	34	60	2,057	275	528	84	16	63	264	161	10	543	42	9	2,254	833	163	7	19	12	41	.257	.311	.405	.716
12	Mariners	.450	2020	27	33	60	1,929	254	435	88	5	60	244	207	30	545	50	16	2,181	713	153	3	12	5	35	.226	.309	.370	.678
13	Phillies	.467	2020	28	32	60	1,948	306	500	90	10	82	289	229	28	480	35	8	2,223	856	182	8	10	16	40	.257	.342	.439	.781
14	Giants	.483	2020	29	31	60	2,019	299	532	107	14	81	290	195	27	499	19	8	2,258	910	202	4	13	8	51	.263	.335	.451	.785
15	Astros	.483	2020	29	31	60	1,992	279	478	103	12	69	268	192	23	440	22	11	2,226	812	184	6	13	5	39	.240	.312	.408	.720
16	Brewers	.483	2020	29	31	60	1,920	247	429	83	5	75	238	221	35	582	15	11	2,186	747	163	0	10	8	53	.223	.313	.389	.702
17	Reds	.517	2020	31	29	60	1,842	243	390	76	3	90	237	239	33	534	29	9	2,121	742	169	0	7	4	44	.212	.312	.403	.715
18	Marlins	.517	2020	31	29	60	1,935	263	472	82	5	60	247	191	25	537	51	14	2,166	744	147	6	9	6	37	.244	.319	.384	.703
19	Cardinals	.517	2020	30	28	58	1,752	240	410	73	7	51	231	205	33	477	18	10	2,010	650	131	4	16	3	38	.234	.323	.371	.694
20	Blue Jays	.533	2020	32	28	60	2,023	302	516	104	4	88	288	203	12	508	33	6	2,260	892	196	8	14	4	39	.255	.325	.441	.766
21	Yankees	.550	2020	33	27	60	1,915	315	473	87	7	94	301	251	30	480	27	7	2,208	856	188	1	11	5	51	.247	.342	.447	.789
22	Cubs	.567	2020	34	26	60	1,918	265	422	82	8	74	248	229	52	568	24	10	2,213	742	164	1	13	9	42	.220	.318	.387	.705
23	Braves	.583	2020	35	25	60	2,074	348	556	130	3	103	338	239	23	573	23	4	2,344	1,001	236	1	7	13	39	.268	.349	.483	.832
24	White Sox	.583	2020	35	25	60	2,047	306	534	94	6	96	294	179	24	571	20	8	2,264	928	196	1	13	1	44	.261	.326	.453	.779
25	Indians	.583	2020	35	25	60	1,959	248	446	96	5	59	234	239	24	517	25	10	2,245	729	160	7	16	4	40	.228	.317	.372	.689