Since 2000, the Kansas City Royals have the worst winning percentage by a team, winning 44.2 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	.442	1,817	2,290	4,107	140,454	17,873	36,584	7,125	884	3,611	16,956	11,027	1,420	27,612	2,849	1,008	154,981	56,310	11,620	906	1,174	613	3,180	.260	.318	.401	.719
2	Pirates	.448	1,836	2,266	4,103	138,907	17,044	34,729	6,951	775	3,739	16,259	12,436	1,674	31,437	2,145	963	155,324	54,447	11,465	1,295	1,012	880	2,959	.250	.317	.392	.709
3	Rockies	.451	1,852	2,256	4,108	140,723	19,770	37,427	7,515	1,038	4,509	18,832	12,924	1,262	32,121	2,282	973	157,509	60,545	13,062	1,511	1,089	954	3,079	.266	.331	.430	.761
4	Orioles	.458	1,880	2,225	4,107	140,816	18,413	36,160	7,104	526	4,744	17,598	11,854	1,440	29,783	2,162	821	155,850	58,548	12,374	669	1,071	606	3,140	.257	.319	.416	.734
5	Marlins	.465	1,908	2,195	4,103	139,447	17,283	35,433	6,879	781	3,857	16,405	12,276	1,511	31,943	2,611	979	155,582	55,445	11,517	1,332	1,016	945	3,050	.254	.319	.398	.717
6	Tigers	.470	1,927	2,175	4,102	140,557	18,335	36,545	7,002	974	4,248	17,541	12,075	1,271	30,918	1,855	834	155,763	58,239	12,224	739	1,121	681	3,149	.260	.322	.414	.736
7	Reds	.473	1,942	2,165	4,109	139,230	18,298	34,997	6,923	619	4,691	17,464	13,499	1,730	32,522	2,590	972	156,863	57,231	12,233	1,400	1,004	942	2,909	.251	.323	.411	.734
8	Nationals	.473	1,943	2,162	4,105	138,686	17,831	35,315	7,178	681	4,092	16,960	13,096	1,474	30,358	2,552	991	155,779	56,131	11,951	1,473	1,050	1,039	3,124	.255	.323	.405	.728
9	White Sox	.479	1,969	2,138	4,107	139,699	18,475	35,823	6,775	568	4,750	17,709	11,938	1,555	30,230	2,270	995	155,118	57,984	12,093	889	1,037	554	3,179	.256	.320	.415	.735
10	Padres	.481	1,975	2,133	4,108	138,610	17,330	34,311	6,648	735	3,942	16,476	13,580	1,284	31,675	2,549	902	155,767	54,255	11,325	1,223	1,070	869	2,961	.248	.318	.391	.710
11	Diamondbacks	.487	2,002	2,105	4,107	140,003	18,714	35,578	7,365	1,002	4,380	17,855	13,631	1,369	31,254	2,374	852	157,413	58,087	12,747	1,248	1,162	1,021	2,936	.254	.324	.415	.739
12	Rangers	.491	2,017	2,091	4,108	141,021	19,934	36,712	7,265	670	5,063	18,991	12,783	1,498	30,706	2,521	893	157,176	60,506	12,998	735	1,139	698	2,942	.260	.326	.429	.755
13	Rays	.496	2,036	2,069	4,105	139,429	18,301	35,231	7,056	791	4,375	17,427	13,257	1,608	32,227	3,146	1,139	156,062	56,994	12,222	670	1,098	647	2,815	.253	.322	.409	.731
14	Twins	.500	2,053	2,055	4,108	140,775	18,946	36,538	7,388	780	4,261	17,972	13,119	1,444	30,008	2,173	886	157,167	58,269	12,429	698	1,131	759	3,190	.260	.327	.414	.741
15	Brewers	.501	2,056	2,051	4,108	138,856	18,377	34,899	7,021	685	4,723	17,546	13,560	1,706	33,241	2,786	944	156,362	57,459	12,429	1,245	995	931	3,081	.251	.323	.414	.737
16	Cubs	.501	2,058	2,047	4,106	139,558	18,509	35,376	7,133	732	4,642	17,633	13,451	1,600	32,081	2,120	860	156,951	57,899	12,507	1,329	1,013	959	3,000	.253	.324	.415	.739
17	Mets	.501	2,058	2,047	4,105	139,130	18,061	35,111	6,937	664	4,371	17,247	13,442	1,663	30,280	2,489	822	156,571	56,489	11,972	1,297	1,039	1,067	3,047	.252	.323	.406	.729
18	Mariners	.503	2,065	2,042	4,107	139,988	18,091	35,375	6,676	584	4,340	17,222	12,960	1,544	30,984	2,653	947	156,347	56,239	11,600	788	1,067	787	2,946	.253	.321	.402	.722
19	Blue Jays	.504	2,068	2,038	4,106	140,546	19,446	36,316	7,612	585	5,017	18,581	13,181	1,481	29,487	1,979	734	156,891	60,149	13,214	581	1,102	606	3,291	.258	.326	.428	.754
20	Angels	.513	2,105	2,002	4,107	140,030	18,854	36,250	6,910	666	4,471	17,954	12,485	1,498	28,933	2,743	1,074	155,977	57,905	12,047	826	1,138	891	3,143	.259	.324	.414	.737
21	Athletics	.513	2,105	2,000	4,105	139,661	18,680	34,867	7,203	589	4,544	17,808	14,169	1,463	30,267	1,953	639	156,943	56,880	12,336	544	1,106	620	3,221	.250	.323	.407	.730
22	Phillies	.515	2,113	1,993	4,106	140,286	18,893	35,729	7,174	811	4,609	18,030	13,890	1,540	31,518	2,654	710	157,941	58,352	12,594	1,209	1,016	1,143	2,831	.255	.326	.416	.742
23	Astros	.515	2,114	1,991	4,106	139,645	18,879	36,004	7,192	632	4,721	18,014	13,211	1,567	29,941	2,341	928	156,673	58,623	12,545	1,152	1,098	828	3,264	.258	.327	.420	.746
24	Giants	.519	2,130	1,974	4,105	139,578	17,974	35,565	7,146	868	4,003	17,110	13,229	1,339	29,580	1,835	771	156,638	56,456	12,017	1,326	1,166	1,248	3,192	.255	.323	.404	.727
25	Guardians	.519	2,132	1,972	4,104	139,797	19,135	36,003	7,488	644	4,450	18,240	13,676	1,606	29,896	2,506	892	157,113	58,129	12,582	843	1,191	789	3,075	.258	.328	.416	.744