Between the 2012 and 2021 seasons, the Miami Marlins had the lowest winning percentage by a team, winning 43.1 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	.431	653	863	1,516	51,320	5,903	12,705	2,295	289	1,288	5,607	4,216	522	12,467	816	298	56,839	19,442	3,872	454	327	317	1,170	.248	.309	.379	.688
2	Padres	.457	694	824	1,518	50,698	6,097	12,118	2,336	279	1,546	5,783	4,574	473	13,074	990	346	56,527	19,650	4,161	431	351	266	1,017	.239	.306	.388	.694
3	Rockies	.458	696	822	1,518	52,140	7,254	13,907	2,743	396	1,772	6,934	4,323	389	12,518	803	332	57,724	22,758	4,911	506	366	326	1,098	.267	.325	.436	.762
4	Orioles	.459	697	821	1,518	51,984	6,646	13,036	2,474	146	2,012	6,373	4,074	513	12,607	514	218	57,111	21,838	4,632	211	329	187	1,133	.251	.310	.420	.730
5	Phillies	.460	698	820	1,518	51,411	6,330	12,613	2,471	285	1,569	6,019	4,556	546	12,527	800	251	57,263	20,361	4,325	429	321	335	1,040	.245	.312	.396	.708
6	White Sox	.464	704	813	1,517	51,676	6,486	13,097	2,425	265	1,654	6,212	4,117	587	12,788	753	327	56,980	21,014	4,344	248	352	177	1,130	.253	.314	.407	.720
7	Tigers	.467	706	807	1,513	51,840	6,611	13,496	2,616	327	1,568	6,344	4,392	453	12,212	640	279	57,263	21,470	4,511	185	393	267	1,227	.260	.321	.414	.735
8	Diamondbacks	.468	711	807	1,518	52,108	6,772	13,122	2,712	387	1,575	6,430	4,805	476	12,514	846	292	58,168	21,333	4,674	397	382	357	1,106	.252	.319	.409	.728
9	Twins	.472	717	801	1,518	51,961	6,938	13,113	2,709	247	1,764	6,621	4,897	505	12,455	685	274	57,961	21,608	4,720	208	390	230	1,033	.252	.321	.416	.736
10	Reds	.474	719	799	1,518	51,160	6,497	12,678	2,464	236	1,719	6,205	4,837	633	12,402	891	346	57,499	20,771	4,419	503	366	343	1,086	.248	.318	.406	.724
11	Royals	.474	720	798	1,518	51,809	6,339	13,314	2,571	304	1,365	6,001	3,837	503	10,928	1,161	336	56,813	20,588	4,240	272	392	206	1,183	.257	.312	.397	.710
12	Rangers	.487	739	780	1,519	51,435	6,886	12,938	2,483	240	1,757	6,540	4,529	643	12,269	1,018	384	57,285	21,172	4,480	278	400	227	1,064	.252	.318	.412	.729
13	Mets	.487	740	778	1,518	51,302	6,376	12,574	2,524	212	1,687	6,134	4,839	641	12,459	646	275	57,470	20,583	4,423	367	321	344	1,128	.245	.316	.401	.717
14	Pirates	.490	743	773	1,517	51,437	6,339	12,878	2,528	314	1,434	6,041	4,569	657	12,088	756	375	57,455	20,336	4,276	440	352	352	1,089	.250	.318	.395	.713
15	Mariners	.492	747	771	1,518	51,477	6,437	12,543	2,362	208	1,768	6,145	4,622	537	12,574	771	332	57,194	20,625	4,338	224	334	203	1,059	.244	.311	.401	.711
16	Blue Jays	.495	751	767	1,518	51,529	7,077	12,943	2,634	164	2,049	6,758	4,936	460	11,992	720	250	57,520	22,052	4,847	221	374	158	1,192	.251	.320	.428	.748
17	Angels	.500	759	759	1,518	51,510	6,868	13,036	2,499	222	1,733	6,542	4,696	558	11,399	812	294	57,429	21,178	4,454	247	418	306	1,214	.253	.320	.411	.731
18	Brewers	.510	775	744	1,519	51,136	6,632	12,673	2,494	249	1,809	6,321	4,827	618	13,101	1,117	347	57,358	21,092	4,552	447	330	300	1,142	.248	.318	.412	.731
19	Cubs	.511	776	742	1,519	51,216	6,693	12,579	2,534	268	1,766	6,370	5,061	721	13,212	666	328	57,700	20,947	4,568	375	327	358	1,090	.246	.320	.409	.729
20	Giants	.513	779	739	1,518	51,915	6,446	13,201	2,615	350	1,358	6,143	4,595	428	11,752	698	282	57,747	20,590	4,323	395	414	350	1,148	.254	.318	.397	.714
21	Astros	.514	781	737	1,518	51,577	7,030	13,113	2,662	210	1,906	6,697	4,904	552	12,298	871	358	57,668	21,913	4,778	227	408	209	1,198	.254	.323	.425	.748
22	Braves	.518	786	730	1,516	51,431	6,667	12,971	2,575	225	1,606	6,371	4,946	517	12,356	742	281	57,706	20,814	4,406	461	351	401	1,101	.252	.322	.405	.727
23	Athletics	.531	806	712	1,518	51,600	6,970	12,678	2,649	245	1,830	6,630	5,102	555	12,016	662	219	57,777	21,307	4,724	139	381	204	1,137	.246	.318	.413	.731
24	Red Sox	.533	809	709	1,518	52,756	7,530	13,983	3,071	230	1,756	7,139	5,009	513	11,940	807	248	58,862	22,782	5,057	166	418	328	1,193	.265	.332	.432	.764
25	Rays	.535	813	706	1,519	51,481	6,650	12,779	2,559	293	1,737	6,329	5,027	642	12,979	863	364	57,758	21,135	4,589	196	412	236	1,081	.248	.320	.411	.731