Between the 2007 and 2016 seasons, the Houston Astros had the worst winning percentage by a team, winning 43.9 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	Astros	.439	711	908	1,619	54,857	6,579	13,724	2,721	255	1,564	6,243	4,684	497	12,459	1,070	434	60,926	21,647	4,540	518	370	296	1,234	.250	.313	.395	.708
2	Marlins	.465	752	866	1,618	55,172	6,711	14,018	2,735	346	1,471	6,375	4,927	539	12,790	911	328	61,669	21,858	4,552	636	395	418	1,194	.254	.319	.396	.715
3	Twins	.465	755	867	1,622	55,604	7,212	14,413	2,855	342	1,412	6,835	5,159	447	11,372	906	347	62,028	22,188	4,609	350	468	336	1,290	.259	.325	.399	.724
4	Mariners	.467	757	863	1,620	55,329	6,475	13,850	2,579	214	1,541	6,157	4,496	454	11,776	901	347	61,019	21,480	4,334	360	380	316	1,197	.250	.310	.388	.698
5	Padres	.468	759	862	1,621	54,565	6,414	13,221	2,593	316	1,390	6,082	5,049	502	12,841	1,038	352	61,116	20,616	4,299	590	410	392	1,102	.242	.310	.378	.688
6	Rockies	.468	759	862	1,621	55,694	7,717	14,953	2,955	433	1,758	7,352	5,148	449	12,424	1,024	408	62,390	24,048	5,146	676	423	415	1,176	.268	.333	.432	.765
7	Pirates	.472	763	855	1,619	55,028	6,685	13,892	2,836	309	1,439	6,400	4,843	630	12,415	889	400	61,503	21,663	4,584	601	401	378	1,200	.252	.318	.394	.712
8	Royals	.475	770	850	1,620	55,807	6,863	14,818	2,882	372	1,240	6,508	4,161	514	10,338	1,176	394	61,297	22,164	4,494	379	436	293	1,362	.266	.320	.397	.717
9	Diamondbacks	.478	775	845	1,620	55,270	7,102	14,072	2,947	418	1,612	6,768	5,219	453	12,786	998	383	61,901	22,691	4,977	524	435	446	1,148	.255	.322	.411	.732
10	Orioles	.482	780	839	1,619	55,732	7,219	14,449	2,815	185	1,905	6,910	4,609	477	11,498	702	291	61,496	23,349	4,905	270	408	280	1,304	.259	.319	.419	.738
11	White Sox	.482	782	839	1,621	55,150	6,948	14,066	2,587	230	1,758	6,658	4,696	617	11,386	943	454	61,204	22,387	4,575	333	408	263	1,317	.255	.318	.406	.724
12	Reds	.487	789	831	1,620	55,154	7,003	13,963	2,757	251	1,709	6,672	5,113	569	12,137	1,017	414	61,986	22,349	4,717	728	422	440	1,113	.253	.321	.405	.726
13	Athletics	.492	796	823	1,619	55,205	7,010	13,767	2,796	276	1,496	6,657	5,427	456	11,479	953	302	61,789	21,603	4,568	250	451	236	1,235	.249	.319	.391	.711
14	Nationals	.493	798	820	1,618	54,874	6,842	13,883	2,714	269	1,586	6,511	5,183	546	12,391	911	333	61,656	21,893	4,569	625	428	368	1,228	.253	.321	.399	.720
15	Brewers	.498	806	814	1,620	54,955	7,199	14,059	2,842	336	1,826	6,889	4,995	665	12,332	1,114	381	61,634	23,051	5,004	623	396	394	1,189	.256	.323	.419	.743
16	Mets	.498	807	813	1,620	55,196	6,900	14,018	2,797	301	1,469	6,567	5,303	503	11,603	1,107	355	62,065	21,824	4,567	617	446	503	1,189	.254	.323	.395	.718
17	Indians	.501	811	807	1,618	55,199	7,266	14,186	2,989	251	1,567	6,921	5,456	633	12,041	964	342	62,134	22,378	4,807	358	488	305	1,250	.257	.328	.405	.734
18	Cubs	.502	811	806	1,618	55,189	6,979	13,986	2,942	286	1,629	6,628	5,183	592	12,662	736	343	61,842	22,387	4,857	514	364	385	1,189	.253	.322	.406	.728
19	Blue Jays	.507	822	798	1,620	55,350	7,564	14,168	2,976	229	1,956	7,218	5,285	497	11,396	854	294	61,902	23,470	5,161	311	459	258	1,292	.256	.324	.424	.748
20	Braves	.510	826	793	1,619	55,091	6,860	14,067	2,796	239	1,442	6,531	5,446	457	12,025	724	319	62,036	21,667	4,477	658	384	451	1,312	.255	.325	.393	.719
21	Phillies	.515	834	786	1,620	55,501	7,145	14,068	2,757	343	1,684	6,810	5,040	630	11,820	1,079	272	62,142	22,563	4,784	587	384	487	1,121	.253	.321	.407	.727
22	Giants	.517	838	782	1,620	55,311	6,670	14,279	2,811	398	1,238	6,298	4,719	441	11,016	858	354	61,521	21,600	4,447	596	454	454	1,291	.258	.319	.391	.710
23	Rays	.519	841	780	1,621	54,889	7,193	13,835	2,815	324	1,738	6,873	5,628	613	12,672	1,211	459	61,892	22,512	4,877	296	466	291	1,144	.252	.326	.410	.736
24	Tigers	.528	855	764	1,619	56,116	7,707	15,319	2,932	359	1,737	7,397	5,086	479	11,416	697	308	62,465	24,180	5,028	337	447	400	1,389	.273	.336	.431	.767
25	Rangers	.531	861	760	1,621	55,774	7,834	14,926	2,909	293	1,843	7,451	4,852	565	11,385	1,129	403	62,084	23,950	5,045	409	484	327	1,213	.268	.330	.429	.759