Between the 2002 and 2011 seasons, the Kansas City Royals had the lowest winning percentage by a team, winning 41.2 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	Royals	.412	668	952	1,620	55,683	7,240	14,813	2,941	378	1,318	6,834	4,549	585	10,028	958	441	61,742	22,464	4,637	456	469	289	1,336	.266	.325	.403	.729
2	Pirates	.420	679	938	1,617	54,946	6,737	14,036	2,861	307	1,386	6,442	4,799	659	11,347	786	348	61,501	21,669	4,554	663	434	380	1,216	.255	.320	.394	.715
3	Orioles	.430	696	923	1,620	56,000	7,349	14,928	2,963	229	1,637	6,998	4,758	536	9,742	962	369	62,107	23,260	4,829	350	463	306	1,356	.267	.327	.415	.743
4	Nationals	.448	725	893	1,618	54,674	6,769	13,882	2,859	290	1,437	6,459	5,326	585	11,239	934	433	61,783	21,632	4,586	791	407	489	1,286	.254	.325	.396	.720
5	Rays	.464	750	868	1,618	55,238	7,409	14,293	2,869	375	1,660	7,063	5,254	585	11,447	1,455	498	61,892	22,892	4,904	338	477	317	1,082	.259	.327	.414	.741
6	Mariners	.468	758	862	1,620	55,729	6,936	14,626	2,735	259	1,376	6,565	4,698	494	10,318	1,090	395	61,771	22,007	4,370	402	448	425	1,223	.262	.323	.395	.718
7	Tigers	.469	760	860	1,620	55,883	7,527	14,931	2,822	407	1,730	7,184	4,791	500	10,983	731	369	62,077	23,757	4,959	439	464	324	1,269	.267	.328	.425	.753
8	Rockies	.475	770	851	1,621	55,431	7,933	14,834	3,016	402	1,716	7,535	5,746	552	11,682	924	411	62,954	23,802	5,134	788	437	471	1,234	.268	.340	.429	.769
9	Reds	.475	770	850	1,621	55,302	7,407	14,136	2,848	218	1,904	7,081	5,615	647	12,179	937	378	62,670	23,132	4,970	714	392	456	1,139	.256	.329	.418	.748
10	Brewers	.477	773	846	1,619	54,979	7,238	14,156	2,942	297	1,803	6,923	5,308	702	11,923	928	364	62,023	23,101	5,042	613	421	466	1,258	.257	.328	.420	.749
11	Padres	.478	775	846	1,621	55,153	6,797	13,972	2,705	325	1,383	6,460	5,542	489	11,299	888	347	62,256	21,476	4,413	609	463	440	1,235	.253	.324	.389	.714
12	Indians	.484	784	836	1,620	55,610	7,695	14,594	3,122	261	1,729	7,343	5,444	697	11,447	762	388	62,582	23,425	5,112	382	449	360	1,281	.262	.333	.421	.755
13	Diamondbacks	.486	787	833	1,620	55,083	7,216	14,100	3,008	394	1,658	6,923	5,535	495	11,577	852	355	62,150	22,870	5,060	581	456	491	1,175	.256	.327	.415	.742
14	Mets	.491	795	823	1,618	55,161	7,220	14,336	2,829	332	1,524	6,842	5,287	514	10,497	1,283	376	62,168	22,401	4,685	745	461	547	1,224	.260	.328	.406	.734
15	Astros	.494	799	820	1,620	55,079	7,089	14,266	2,857	294	1,559	6,756	5,062	575	10,526	930	365	61,869	22,388	4,710	746	407	432	1,287	.259	.326	.406	.732
16	Cubs	.494	800	818	1,618	55,592	7,291	14,609	3,008	292	1,760	6,941	5,012	483	11,218	741	323	62,178	23,481	5,060	687	404	418	1,280	.263	.327	.422	.749
17	Blue Jays	.499	808	811	1,619	55,739	7,773	14,697	3,197	295	1,800	7,419	5,179	620	10,525	702	286	62,272	23,884	5,292	237	497	299	1,336	.264	.330	.428	.759
18	Marlins	.499	808	811	1,619	55,213	7,319	14,447	2,968	340	1,630	6,929	5,306	637	11,791	1,072	450	62,297	22,985	4,938	707	434	488	1,171	.262	.331	.416	.747
19	Rangers	.505	818	802	1,620	56,375	8,372	15,277	3,117	304	2,108	7,993	5,098	526	10,979	900	313	62,828	25,326	5,529	348	481	337	1,213	.271	.335	.449	.784
20	White Sox	.522	846	775	1,621	55,152	7,755	14,500	2,726	200	2,055	7,442	5,058	647	10,054	959	481	61,755	23,791	4,981	451	447	274	1,309	.263	.330	.431	.761
21	Giants	.523	846	771	1,618	54,981	7,030	14,258	2,910	346	1,482	6,650	5,150	518	9,937	744	331	61,827	22,306	4,738	736	442	697	1,362	.259	.326	.406	.732
22	Dodgers	.526	852	767	1,619	55,189	7,079	14,441	2,695	323	1,432	6,746	5,205	543	10,305	1,061	429	62,041	22,078	4,450	686	418	526	1,295	.262	.329	.400	.729
23	Athletics	.526	852	767	1,619	55,422	7,358	14,236	2,936	228	1,554	7,015	5,761	528	10,308	779	268	62,459	22,290	4,718	267	481	283	1,352	.257	.330	.402	.732
24	Twins	.534	866	755	1,621	55,852	7,602	15,077	2,939	362	1,436	7,172	5,097	497	9,802	951	409	62,340	23,048	4,737	401	493	407	1,420	.270	.334	.413	.746
25	Braves	.549	889	729	1,619	55,627	7,713	14,793	3,025	277	1,750	7,366	5,642	481	11,008	694	316	62,902	23,622	5,052	723	429	517	1,342	.266	.336	.425	.761