Since 2005, the Kansas City Royals have the worst record by a team, with a record of 1431-1790.

	TEAM	REC	W%	G	W	L	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	1431-1790	.444	3,221	1,431	1,790	109,918	13,613	28,432	5,587	703	2,760	12,931	8,425	1,083	22,461	2,257	763	120,976	43,705	9,050	656	894	462	2,490	.259	.315	.398	.713
2	Pirates	1452-1768	.451	3,221	1,452	1,768	109,022	13,247	27,115	5,440	608	2,910	12,661	9,681	1,263	25,422	1,693	711	121,718	42,501	8,958	945	807	661	2,341	.249	.315	.390	.705
3	Rockies	1457-1765	.452	3,222	1,457	1,765	110,224	15,115	28,952	5,810	807	3,505	14,428	9,961	979	26,149	1,766	716	123,126	46,891	10,122	1,141	821	703	2,377	.263	.327	.425	.752
4	Marlins	1459-1757	.454	3,216	1,459	1,757	109,262	13,290	27,535	5,306	599	2,999	12,629	9,425	1,177	25,969	1,862	676	121,641	43,036	8,904	1,009	768	705	2,401	.252	.316	.394	.710
5	Orioles	1488-1732	.462	3,220	1,488	1,732	110,350	14,355	28,217	5,501	402	3,850	13,739	9,134	1,105	24,352	1,541	559	121,855	46,072	9,753	466	800	448	2,453	.256	.317	.418	.734
6	White Sox	1511-1711	.469	3,222	1,511	1,711	109,542	13,850	27,734	5,163	436	3,548	13,274	9,036	1,250	24,764	1,773	779	121,216	44,413	9,147	612	776	422	2,492	.253	.315	.405	.721
7	Reds	1531-1691	.475	3,223	1,531	1,691	108,985	14,268	27,260	5,387	478	3,697	13,623	10,533	1,351	25,854	2,075	762	122,713	44,694	9,562	1,056	788	689	2,246	.250	.322	.410	.732
8	Nationals	1544-1675	.480	3,219	1,544	1,675	108,838	14,029	27,670	5,559	512	3,259	13,352	10,346	1,240	24,532	2,008	732	122,308	44,030	9,330	1,048	836	727	2,431	.254	.324	.405	.728
9	Diamondbacks	1553-1667	.482	3,220	1,553	1,667	109,670	14,599	27,639	5,794	777	3,450	13,921	10,657	1,082	25,533	1,926	635	123,217	45,337	10,021	911	897	740	2,273	.252	.322	.413	.735
10	Mariners	1561-1659	.485	3,220	1,561	1,659	109,378	13,564	27,044	5,098	431	3,415	12,916	9,613	1,236	25,191	1,926	697	121,522	43,249	8,944	543	752	537	2,273	.247	.313	.395	.709
11	Padres	1561-1661	.484	3,222	1,561	1,661	108,389	13,348	26,506	5,169	572	3,147	12,701	10,388	1,019	25,622	2,042	683	121,586	42,260	8,888	979	811	652	2,266	.245	.314	.390	.704
12	Tigers	1578-1640	.490	3,218	1,578	1,640	110,366	14,466	28,774	5,549	725	3,361	13,855	9,492	988	24,992	1,360	569	122,210	45,856	9,635	511	853	550	2,499	.261	.323	.415	.738
13	Athletics	1581-1642	.491	3,223	1,581	1,642	109,221	14,117	26,847	5,500	470	3,422	13,440	10,793	1,118	24,452	1,671	522	122,397	43,553	9,392	413	852	393	2,519	.246	.318	.399	.716
14	Twins	1594-1629	.495	3,223	1,594	1,629	110,198	14,763	28,331	5,646	577	3,377	14,030	10,329	1,125	24,152	1,576	603	123,054	45,262	9,600	521	881	573	2,483	.257	.325	.411	.735
15	Rangers	1602-1620	.497	3,222	1,602	1,620	110,192	15,304	28,407	5,583	508	3,858	14,562	9,866	1,159	24,863	2,095	706	122,649	46,580	9,949	561	871	504	2,266	.258	.323	.423	.746
16	Cubs	1621-1599	.503	3,221	1,621	1,599	109,449	14,430	27,653	5,608	585	3,568	13,735	10,418	1,325	25,783	1,699	689	122,828	45,135	9,761	884	752	693	2,348	.253	.323	.412	.735
17	Giants	1624-1597	.504	3,221	1,624	1,597	109,405	13,520	27,521	5,528	674	2,892	12,849	9,743	1,031	23,983	1,505	603	122,002	43,073	9,094	946	877	766	2,500	.252	.316	.394	.710
18	Blue Jays	1628-1593	.505	3,221	1,628	1,593	109,831	14,981	28,077	5,897	415	3,954	14,323	10,368	1,101	23,548	1,538	561	122,605	46,666	10,266	453	852	422	2,566	.256	.324	.425	.749
19	Mets	1636-1587	.508	3,223	1,636	1,587	109,296	14,205	27,558	5,471	554	3,444	13,582	10,482	1,338	24,317	2,015	624	122,877	44,469	9,469	942	819	810	2,347	.252	.323	.407	.730
20	Angels	1650-1570	.512	3,220	1,650	1,570	109,461	14,565	27,983	5,345	495	3,514	13,874	9,743	1,128	23,521	2,095	803	121,774	44,860	9,354	572	870	675	2,506	.256	.321	.410	.730
21	Astros	1651-1569	.513	3,221	1,651	1,569	109,410	14,416	27,958	5,571	464	3,637	13,763	9,997	1,164	23,929	1,905	733	122,203	45,368	9,672	794	838	556	2,531	.256	.322	.415	.737
22	Phillies	1665-1557	.517	3,222	1,665	1,557	110,000	14,711	27,849	5,489	638	3,633	14,039	10,558	1,259	25,258	2,070	519	123,479	45,513	9,760	888	774	855	2,198	.253	.324	.414	.737
23	Brewers	1675-1547	.520	3,222	1,675	1,547	108,716	14,519	27,288	5,484	535	3,780	13,867	10,599	1,343	26,365	2,253	710	122,345	45,182	9,799	914	773	708	2,379	.251	.323	.416	.739
24	Guardians	1683-1534	.523	3,217	1,683	1,534	109,297	14,667	27,904	5,863	487	3,400	13,979	10,572	1,260	24,055	2,024	650	122,667	44,941	9,750	605	933	612	2,368	.255	.326	.411	.737
25	Rays	1687-1536	.523	3,223	1,687	1,536	109,126	14,490	27,438	5,508	622	3,591	13,796	10,699	1,316	26,337	2,483	889	122,466	44,963	9,721	454	871	483	2,189	.251	.323	.412	.735