Between the 2011 and 2020 seasons, the Miami Marlins had the worst winning percentage by a team, winning 43.4 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	Marlins	.434	658	858	1,516	51,479	5,905	12,819	2,343	296	1,279	5,609	4,308	508	12,158	805	310	57,147	19,591	3,918	513	339	330	1,186	.249	.311	.381	.692
2	Padres	.452	686	832	1,518	50,731	5,961	12,097	2,310	300	1,457	5,651	4,489	460	13,070	1,050	351	56,482	19,378	4,067	450	352	266	1,001	.238	.304	.382	.686
3	White Sox	.455	690	827	1,517	51,821	6,344	13,111	2,402	259	1,618	6,080	4,006	593	12,388	777	360	57,055	20,885	4,279	276	359	198	1,116	.253	.312	.403	.715
4	Rockies	.458	695	824	1,519	52,310	7,250	13,998	2,742	402	1,753	6,922	4,387	388	12,363	845	351	57,992	22,803	4,897	533	374	356	1,112	.268	.327	.436	.763
5	Twins	.466	707	811	1,518	52,017	6,828	13,159	2,697	255	1,639	6,503	4,812	472	12,098	723	298	57,906	21,283	4,591	232	373	237	1,026	.253	.320	.409	.729
6	Orioles	.470	714	804	1,518	52,149	6,695	13,174	2,481	144	2,008	6,425	4,075	500	12,273	541	220	57,286	21,967	4,633	221	341	199	1,182	.253	.311	.421	.732
7	Reds	.471	715	803	1,518	51,349	6,446	12,764	2,433	242	1,680	6,146	4,819	591	12,227	952	372	57,666	20,721	4,355	546	361	373	1,055	.249	.318	.404	.722
8	Royals	.472	717	801	1,518	52,054	6,383	13,525	2,645	316	1,331	6,059	3,858	487	10,676	1,190	361	57,092	20,795	4,292	296	397	235	1,204	.260	.315	.399	.714
9	Phillies	.473	718	800	1,518	51,624	6,309	12,734	2,467	299	1,524	6,012	4,531	535	12,149	819	256	57,453	20,371	4,290	447	316	350	1,045	.247	.312	.395	.707
10	Mariners	.477	724	794	1,518	51,543	6,296	12,597	2,382	219	1,678	6,006	4,522	502	12,362	832	348	57,159	20,451	4,279	253	339	228	1,049	.244	.310	.397	.706
11	Tigers	.479	724	789	1,513	52,027	6,701	13,737	2,677	324	1,558	6,419	4,423	448	11,841	601	274	57,517	21,736	4,559	218	401	306	1,256	.264	.325	.418	.743
12	Mets	.487	740	778	1,518	51,692	6,458	12,808	2,605	233	1,619	6,206	4,915	598	12,152	722	284	57,949	20,736	4,457	398	346	375	1,117	.248	.318	.401	.719
13	Blue Jays	.488	741	777	1,518	51,612	6,974	12,872	2,634	185	1,973	6,646	4,965	457	11,958	770	282	57,662	21,795	4,792	242	386	185	1,188	.249	.319	.422	.741
14	Astros	.489	742	776	1,518	51,582	6,782	13,059	2,672	224	1,780	6,442	4,736	534	12,240	936	375	57,527	21,519	4,676	284	391	218	1,173	.253	.320	.417	.737
15	Diamondbacks	.496	753	765	1,518	52,040	6,824	13,182	2,697	393	1,603	6,488	4,799	483	12,298	936	331	58,124	21,474	4,693	415	387	388	1,089	.253	.320	.413	.733
16	Pirates	.497	754	762	1,517	51,522	6,340	12,942	2,565	314	1,417	6,051	4,529	642	12,068	804	397	57,536	20,386	4,296	484	359	359	1,110	.251	.317	.396	.713
17	Giants	.499	758	760	1,518	51,939	6,212	13,168	2,626	349	1,238	5,909	4,441	416	11,413	717	319	57,644	20,206	4,213	421	427	352	1,148	.254	.315	.389	.704
18	Angels	.506	768	750	1,518	51,586	6,812	13,099	2,523	233	1,698	6,480	4,674	550	11,091	868	320	57,502	21,182	4,454	267	425	304	1,233	.254	.320	.411	.731
19	Rangers	.510	775	744	1,519	51,689	7,116	13,283	2,568	248	1,800	6,749	4,571	624	11,818	1,055	400	57,603	21,747	4,616	301	418	252	1,086	.257	.322	.421	.743
20	Brewers	.511	776	743	1,519	51,221	6,615	12,844	2,515	262	1,800	6,314	4,722	586	12,719	1,129	357	57,375	21,283	4,577	507	339	327	1,154	.251	.319	.416	.735
21	Cubs	.511	776	742	1,519	51,459	6,642	12,747	2,594	278	1,704	6,308	4,984	688	12,818	649	314	57,858	21,009	4,576	395	332	376	1,080	.248	.321	.408	.729
22	Braves	.519	787	730	1,517	51,596	6,518	13,009	2,550	221	1,540	6,215	4,901	478	12,163	760	306	57,817	20,621	4,311	504	338	410	1,133	.252	.321	.400	.720
23	Athletics	.523	794	724	1,518	51,657	6,872	12,724	2,658	255	1,745	6,544	5,066	507	11,761	691	242	57,775	21,127	4,658	156	389	207	1,157	.246	.318	.409	.727
24	Rays	.529	804	715	1,519	51,410	6,500	12,767	2,544	294	1,687	6,193	5,013	643	12,630	930	384	57,699	20,960	4,525	227	406	240	1,107	.248	.321	.408	.728
25	Red Sox	.532	807	711	1,518	52,971	7,576	14,149	3,093	242	1,740	7,198	5,075	502	11,662	869	269	59,152	22,946	5,075	178	426	358	1,229	.267	.334	.433	.768