Between the 1997 and 2006 seasons, the Tampa Bay Devil Rays had the worst winning percentage by a team, winning 39.8 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	Devil Rays	.398	579	876	1,455	49,937	6,338	13,070	2,532	307	1,301	6,014	4,229	491	9,472	1,059	450	55,404	20,119	4,140	360	387	253	1,095	.262	.323	.403	.726
2	Royals	.412	666	951	1,617	55,854	7,676	15,001	2,840	372	1,447	7,241	4,847	588	9,667	1,058	454	62,292	22,926	4,659	479	524	284	1,288	.269	.331	.410	.741
3	Tigers	.429	694	924	1,618	55,546	7,338	14,586	2,788	411	1,718	6,976	4,657	546	10,686	982	528	61,617	23,350	4,917	402	466	258	1,207	.263	.323	.420	.744
4	Pirates	.439	710	907	1,618	55,030	7,045	14,218	2,803	342	1,463	6,682	4,889	792	11,072	986	437	61,855	22,094	4,608	705	439	387	1,174	.258	.325	.401	.727
5	Brewers	.442	714	903	1,618	54,945	7,114	14,085	2,887	253	1,663	6,780	5,412	661	11,768	884	427	62,085	22,467	4,803	643	424	432	1,288	.256	.328	.409	.737
6	Nationals	.451	731	889	1,620	54,728	6,927	14,081	3,072	318	1,529	6,560	4,929	559	10,465	890	490	61,428	22,376	4,919	819	393	537	1,233	.257	.323	.409	.732
7	Rockies	.460	745	875	1,620	56,013	8,563	15,714	3,100	423	1,878	8,102	5,405	532	10,375	897	475	63,190	25,294	5,401	789	451	446	1,302	.281	.347	.452	.799
8	Orioles	.464	752	867	1,621	55,860	7,710	14,988	2,929	216	1,772	7,341	5,198	612	9,258	1,019	432	62,578	23,665	4,917	413	495	325	1,339	.268	.335	.424	.758
9	Cubs	.473	767	854	1,621	55,417	7,444	14,476	2,777	314	1,872	7,090	5,212	457	10,948	789	389	62,320	23,497	4,963	810	424	462	1,246	.261	.328	.424	.752
10	Reds	.479	776	845	1,623	55,424	7,548	14,359	2,934	247	1,849	7,201	5,653	603	11,856	1,121	422	62,745	23,334	5,030	670	395	450	1,195	.259	.332	.421	.753
11	Marlins	.481	779	840	1,619	55,102	7,214	14,450	2,876	349	1,465	6,813	5,318	609	10,911	1,208	542	62,137	22,419	4,690	663	445	463	1,228	.262	.331	.407	.738
12	Padres	.488	790	830	1,620	55,232	7,318	14,298	2,746	301	1,484	6,957	5,961	437	10,946	1,074	444	62,609	22,098	4,531	501	478	397	1,269	.259	.333	.400	.733
13	Rangers	.491	795	825	1,620	56,579	8,659	15,611	3,154	295	2,176	8,277	5,376	502	10,492	747	351	63,258	25,883	5,625	299	502	345	1,300	.276	.341	.457	.799
14	Phillies	.492	796	823	1,619	55,604	7,689	14,621	3,006	351	1,640	7,285	6,021	535	11,104	1,053	364	63,269	23,249	4,997	642	467	534	1,155	.263	.338	.418	.756
15	Diamondbacks	.499	728	730	1,458	50,088	6,803	13,143	2,593	362	1,565	6,492	4,924	480	9,414	742	331	56,464	21,155	4,520	551	421	451	1,099	.262	.332	.422	.754
16	Blue Jays	.500	809	810	1,620	55,985	7,991	14,992	3,150	302	1,876	7,630	5,206	722	10,634	985	410	62,656	24,374	5,328	257	486	321	1,287	.268	.335	.435	.771
17	Twins	.501	810	807	1,618	55,971	7,549	15,129	3,048	360	1,422	7,111	5,024	545	10,066	1,109	516	62,340	23,163	4,830	306	494	369	1,398	.270	.334	.414	.747
18	Mets	.519	841	778	1,619	54,983	7,357	14,224	2,805	243	1,659	6,993	5,579	540	10,555	1,004	446	62,242	22,492	4,707	699	441	508	1,267	.259	.331	.409	.740
19	Indians	.523	846	773	1,619	55,988	8,530	15,371	3,132	289	1,997	8,123	5,925	557	10,616	949	456	63,394	25,072	5,418	420	504	350	1,346	.275	.347	.448	.795
20	Angels	.523	848	772	1,620	56,004	7,832	15,224	2,893	295	1,630	7,430	5,061	534	9,375	1,197	538	62,534	23,597	4,818	452	483	396	1,225	.272	.335	.421	.757
21	Mariners	.524	848	771	1,619	56,020	8,239	15,276	2,912	294	1,838	7,835	5,760	527	10,358	1,193	443	63,252	24,290	5,044	428	517	449	1,224	.273	.343	.434	.777
22	Dodgers	.524	849	771	1,620	55,159	7,313	14,317	2,596	301	1,721	6,975	5,239	533	10,380	1,083	467	62,062	22,678	4,618	723	408	427	1,221	.260	.328	.411	.739
23	White Sox	.527	852	766	1,620	55,539	8,314	15,092	2,894	275	2,063	7,944	5,240	526	9,541	1,045	475	62,312	24,725	5,232	489	518	284	1,260	.272	.337	.445	.783
24	Astros	.544	882	738	1,621	55,263	8,044	14,687	2,984	313	1,804	7,627	6,038	742	10,846	1,090	468	63,279	23,709	5,101	744	492	533	1,294	.266	.343	.429	.772
25	Giants	.549	889	729	1,619	55,240	8,008	14,740	2,964	340	1,834	7,635	6,189	530	9,917	767	378	63,235	23,886	5,138	779	497	741	1,293	.267	.344	.432	.776