Between the 2010 and 2019 seasons, the Miami Marlins had the worst winning percentage by a team, winning 43.7 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	.437	707	911	1,618	55,075	6,361	13,750	2,555	328	1,371	6,048	4,631	538	12,996	846	322	61,175	21,074	4,254	558	373	366	1,256	.250	.312	.383	.695
2	Padres	.456	739	881	1,620	54,193	6,301	12,929	2,443	312	1,494	5,969	4,823	482	13,774	1,119	388	60,399	20,478	4,249	517	384	327	1,070	.239	.304	.378	.682
3	White Sox	.459	743	876	1,619	55,258	6,790	14,044	2,571	274	1,699	6,496	4,294	648	12,739	917	426	60,909	22,260	4,544	325	384	220	1,220	.254	.313	.403	.716
4	Rockies	.464	752	869	1,621	55,783	7,745	14,922	2,928	440	1,863	7,399	4,811	425	13,094	902	383	62,003	24,319	5,231	582	402	397	1,174	.268	.328	.436	.764
5	Orioles	.466	755	865	1,620	55,677	7,034	14,091	2,643	158	2,064	6,738	4,335	527	12,815	598	240	61,152	23,242	4,865	237	376	226	1,304	.253	.311	.417	.729
6	Royals	.468	758	862	1,620	55,670	6,811	14,574	2,827	340	1,384	6,462	4,157	504	11,054	1,256	391	61,104	22,233	4,551	333	440	257	1,328	.262	.317	.399	.716
7	Mariners	.468	758	862	1,620	55,023	6,555	13,436	2,521	230	1,719	6,247	4,774	511	13,001	924	371	60,967	21,574	4,470	292	367	256	1,124	.244	.309	.392	.701
8	Twins	.472	765	855	1,620	55,648	7,340	14,212	2,934	293	1,690	6,994	5,185	482	12,537	777	319	61,995	22,802	4,917	268	412	273	1,147	.255	.322	.410	.732
9	Reds	.478	775	845	1,620	55,086	6,993	13,889	2,650	269	1,778	6,670	5,102	626	12,911	1,016	406	61,830	22,411	4,697	612	404	403	1,124	.252	.320	.407	.727
10	Tigers	.484	782	835	1,617	55,777	7,203	14,789	2,907	344	1,648	6,894	4,822	470	12,421	651	298	61,755	23,328	4,899	258	428	355	1,332	.265	.327	.418	.745
11	Phillies	.486	787	833	1,620	55,257	6,775	13,685	2,667	323	1,608	6,459	4,862	570	12,733	892	269	61,521	21,822	4,598	483	349	403	1,125	.248	.313	.395	.708
12	Astros	.487	789	831	1,620	55,042	7,114	13,929	2,821	237	1,819	6,751	4,959	544	12,825	1,014	400	61,305	22,681	4,877	353	407	240	1,264	.253	.319	.412	.731
13	Pirates	.489	792	826	1,619	54,976	6,708	13,820	2,765	335	1,484	6,411	4,825	664	12,754	875	422	61,377	21,707	4,584	535	377	381	1,195	.251	.317	.395	.712
14	Mets	.490	793	827	1,620	55,134	6,828	13,618	2,765	266	1,661	6,553	5,220	599	12,749	832	318	61,814	21,898	4,692	471	390	420	1,165	.247	.317	.397	.714
15	Diamondbacks	.490	793	827	1,620	55,516	7,268	14,066	2,897	415	1,725	6,924	5,207	486	13,366	999	365	62,069	22,968	5,037	455	405	428	1,165	.253	.321	.414	.734
16	Blue Jays	.490	794	826	1,620	55,084	7,427	13,720	2,849	202	2,142	7,090	5,233	500	12,614	795	296	61,473	23,399	5,193	250	406	206	1,263	.249	.318	.425	.743
17	Cubs	.504	817	803	1,621	55,053	7,062	13,739	2,810	297	1,779	6,718	5,234	686	13,486	680	335	61,784	22,480	4,886	454	357	399	1,162	.250	.321	.408	.729
18	Giants	.507	821	799	1,620	55,408	6,610	14,047	2,803	365	1,319	6,279	4,733	439	12,013	753	343	61,528	21,537	4,487	493	455	397	1,255	.254	.315	.389	.704
19	Angels	.507	822	798	1,620	55,054	7,199	13,961	2,702	244	1,768	6,851	4,901	577	11,671	951	364	61,279	22,455	4,714	303	444	324	1,309	.254	.319	.408	.727
20	Brewers	.508	824	797	1,621	54,907	7,118	13,886	2,725	290	1,907	6,786	5,047	632	13,353	1,195	372	61,492	22,912	4,922	542	364	354	1,216	.253	.321	.417	.738
21	Athletics	.518	839	781	1,620	55,197	7,261	13,690	2,843	274	1,783	6,899	5,355	515	12,298	821	277	61,690	22,430	4,900	197	426	218	1,242	.248	.318	.406	.724
22	Rangers	.520	843	778	1,621	55,388	7,679	14,419	2,756	264	1,900	7,285	4,915	645	12,256	1,129	434	61,754	23,403	4,920	352	454	286	1,182	.260	.325	.423	.748
23	Braves	.521	843	776	1,619	54,985	6,908	13,864	2,732	243	1,576	6,576	5,296	506	12,730	800	331	61,725	21,810	4,551	572	366	447	1,230	.252	.322	.397	.718
24	Indians	.528	855	763	1,618	55,015	7,282	14,009	2,947	240	1,708	6,932	5,445	549	12,089	1,057	335	61,806	22,560	4,895	332	465	277	1,206	.255	.325	.410	.735
25	Rays	.531	860	761	1,621	54,874	7,013	13,640	2,734	319	1,767	6,688	5,442	672	13,314	1,054	422	61,703	22,313	4,820	266	449	261	1,161	.249	.322	.407	.728