Between the 1996 and 2005 seasons, the Tampa Bay Devil Rays had the worst winning percentage by a team, winning 40.1 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	Devil Rays	.401	518	775	1,293	44,463	5,649	11,675	2,265	274	1,111	5,364	3,788	444	8,366	925	398	49,364	17,821	3,650	325	344	230	994	.263	.324	.401	.725
2	Tigers	.403	652	966	1,618	55,434	7,299	14,451	2,751	392	1,719	6,932	4,773	530	10,821	1,009	538	61,621	23,143	4,862	405	479	257	1,219	.261	.323	.417	.740
3	Royals	.420	679	937	1,616	55,807	7,665	14,963	2,791	373	1,446	7,212	4,902	567	9,570	1,188	505	62,294	22,838	4,610	493	525	288	1,260	.268	.331	.409	.740
4	Pirates	.443	716	901	1,618	55,137	7,130	14,265	2,836	358	1,460	6,764	4,940	743	10,861	1,044	463	61,974	22,197	4,654	715	439	384	1,128	.259	.326	.403	.728
5	Brewers	.445	719	898	1,618	55,174	7,278	14,263	2,890	273	1,661	6,930	5,534	632	11,521	914	438	62,391	22,682	4,824	630	421	419	1,270	.259	.331	.411	.742
6	Nationals	.462	748	872	1,620	54,738	6,922	14,085	3,047	323	1,513	6,561	4,827	548	10,386	875	462	61,315	22,317	4,883	822	380	520	1,234	.257	.322	.408	.729
7	Rockies	.464	752	868	1,620	56,041	8,711	15,817	3,072	406	1,942	8,250	5,371	554	10,375	1,013	491	63,175	25,527	5,420	751	458	422	1,301	.282	.348	.456	.804
8	Orioles	.476	770	849	1,622	55,939	7,891	14,989	2,940	225	1,865	7,528	5,369	600	9,295	974	440	62,833	23,974	5,030	404	521	339	1,328	.268	.336	.429	.764
9	Cubs	.479	777	844	1,621	55,361	7,500	14,368	2,773	287	1,881	7,138	5,340	475	11,110	776	390	62,403	23,358	4,941	792	435	486	1,237	.260	.328	.422	.750
10	Reds	.479	777	844	1,623	55,364	7,577	14,338	2,902	271	1,823	7,216	5,643	578	11,798	1,168	452	62,666	23,251	4,996	675	406	445	1,188	.259	.332	.420	.752
11	Phillies	.481	778	841	1,619	55,416	7,474	14,508	2,961	349	1,556	7,066	5,931	485	10,993	1,078	380	62,931	22,835	4,866	639	460	519	1,156	.262	.336	.412	.748
12	Marlins	.482	781	838	1,619	55,098	7,144	14,409	2,807	337	1,433	6,750	5,374	590	10,784	1,197	530	62,138	22,189	4,577	628	448	459	1,257	.262	.331	.403	.734
13	Padres	.490	793	827	1,620	55,311	7,358	14,332	2,733	287	1,470	6,977	5,998	447	10,856	1,060	468	62,740	22,049	4,490	501	483	422	1,288	.259	.334	.399	.732
14	Twins	.490	792	825	1,618	56,042	7,625	15,154	3,105	373	1,397	7,169	5,110	560	10,152	1,151	527	62,509	23,196	4,875	295	502	365	1,407	.270	.335	.414	.749
15	Blue Jays	.492	796	823	1,620	55,988	7,948	14,852	3,104	310	1,854	7,564	5,221	751	10,833	1,036	415	62,710	24,138	5,268	279	471	309	1,241	.265	.334	.431	.765
16	Rangers	.497	805	815	1,621	56,622	8,752	15,662	3,120	304	2,214	8,368	5,531	493	10,472	777	353	63,480	26,032	5,638	313	521	361	1,280	.277	.343	.460	.803
17	Diamondbacks	.503	652	644	1,296	44,443	6,030	11,637	2,262	324	1,405	5,749	4,420	413	8,449	666	301	50,134	18,762	3,991	490	368	404	963	.262	.332	.422	.754
18	Mets	.503	815	804	1,619	55,043	7,269	14,270	2,749	249	1,606	6,890	5,477	511	10,553	955	459	62,171	22,335	4,604	697	443	499	1,267	.259	.330	.406	.735
19	Angels	.512	829	790	1,619	56,081	7,828	15,256	2,840	290	1,663	7,420	5,102	521	9,435	1,102	520	62,633	23,665	4,793	466	463	387	1,247	.272	.336	.422	.758
20	White Sox	.523	847	771	1,620	55,526	8,344	15,092	2,887	288	2,022	7,965	5,439	502	9,412	1,057	468	62,491	24,621	5,197	501	523	319	1,281	.272	.339	.443	.783
21	Dodgers	.525	851	769	1,620	55,069	7,196	14,161	2,504	276	1,718	6,849	5,154	504	10,611	1,079	458	61,853	22,371	4,498	731	395	425	1,193	.257	.324	.406	.730
22	Mariners	.528	855	763	1,618	56,018	8,476	15,361	2,989	271	1,911	8,086	6,026	539	10,436	1,177	445	63,556	24,625	5,171	436	537	457	1,228	.274	.347	.440	.787
23	Indians	.536	867	751	1,618	56,050	8,612	15,460	3,116	285	2,019	8,188	6,040	546	10,256	1,054	483	63,578	25,203	5,420	424	518	352	1,383	.276	.349	.450	.799
24	Athletics	.540	875	744	1,619	55,771	8,286	14,625	2,996	209	1,987	7,885	6,385	607	10,512	610	277	63,522	24,000	5,192	318	441	353	1,330	.262	.342	.430	.772
25	Giants	.544	881	738	1,620	55,301	8,014	14,722	2,912	309	1,824	7,631	6,310	525	10,215	822	406	63,415	23,724	5,045	776	503	727	1,265	.266	.344	.429	.773