Since 2005, the Kansas City Royals have the worst record by a team, with a record of 1439-1798.

	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	1439-1798	.445	3,237	1,439	1,798	110,450	13,673	28,557	5,619	704	2,778	12,991	8,458	1,094	22,578	2,266	767	121,555	43,918	9,101	658	895	462	2,500	.259	.315	.398	.713
2	Pirates	1456-1777	.450	3,234	1,456	1,777	109,440	13,277	27,197	5,456	608	2,916	12,690	9,709	1,263	25,527	1,700	714	122,165	42,617	8,980	945	808	662	2,343	.249	.315	.389	.704
3	Rockies	1462-1774	.452	3,236	1,462	1,774	110,702	15,166	29,076	5,833	810	3,519	14,476	9,992	982	26,274	1,776	720	123,641	47,086	10,162	1,143	822	703	2,391	.263	.327	.425	.752
4	Marlins	1469-1763	.455	3,232	1,469	1,763	109,794	13,362	27,666	5,329	603	3,017	12,698	9,470	1,181	26,079	1,873	679	122,228	43,252	8,949	1,010	773	710	2,413	.252	.316	.394	.710
5	Orioles	1495-1738	.462	3,233	1,495	1,738	110,791	14,404	28,317	5,527	403	3,863	13,787	9,164	1,111	24,463	1,550	564	122,333	46,239	9,793	466	801	450	2,459	.256	.317	.417	.734
6	White Sox	1516-1720	.468	3,236	1,516	1,720	109,990	13,905	27,831	5,187	438	3,561	13,329	9,087	1,257	24,876	1,778	780	121,730	44,577	9,186	616	780	425	2,504	.253	.315	.405	.720
7	Reds	1539-1698	.475	3,238	1,539	1,698	109,486	14,335	27,380	5,409	481	3,713	13,683	10,576	1,361	25,980	2,082	762	123,271	44,890	9,603	1,057	791	692	2,258	.250	.322	.410	.732
8	Nationals	1548-1685	.479	3,233	1,548	1,685	109,325	14,089	27,793	5,577	516	3,269	13,411	10,392	1,242	24,648	2,018	736	122,846	44,209	9,362	1,049	838	732	2,442	.254	.324	.404	.728
9	Diamondbacks	1560-1676	.482	3,236	1,560	1,676	110,198	14,671	27,761	5,821	781	3,472	13,989	10,717	1,090	25,673	1,932	637	123,824	45,560	10,074	918	901	743	2,283	.252	.322	.413	.735
10	Padres	1569-1667	.485	3,236	1,569	1,667	108,840	13,393	26,616	5,182	573	3,158	12,745	10,438	1,023	25,725	2,052	685	122,102	42,418	8,913	986	815	657	2,274	.245	.314	.390	.704
11	Mariners	1571-1664	.486	3,235	1,571	1,664	109,896	13,647	27,182	5,123	432	3,447	12,995	9,662	1,242	25,323	1,933	700	122,103	43,510	9,002	547	756	544	2,280	.247	.313	.396	.709
12	Tigers	1585-1647	.490	3,232	1,585	1,647	110,827	14,527	28,878	5,565	727	3,381	13,913	9,544	998	25,121	1,372	571	122,737	46,040	9,673	511	857	550	2,506	.261	.323	.415	.738
13	Athletics	1588-1648	.491	3,236	1,588	1,648	109,668	14,186	26,960	5,528	474	3,447	13,507	10,830	1,121	24,589	1,680	525	122,888	43,777	9,449	415	854	396	2,525	.246	.318	.399	.717
14	Twins	1601-1636	.495	3,237	1,601	1,636	110,653	14,813	28,436	5,665	578	3,395	14,078	10,358	1,130	24,271	1,584	607	123,546	45,442	9,638	521	884	573	2,490	.257	.325	.411	.735
15	Rangers	1610-1627	.497	3,237	1,610	1,627	110,736	15,395	28,546	5,612	509	3,879	14,649	9,921	1,166	24,996	2,118	708	123,261	46,813	10,000	563	875	507	2,276	.258	.323	.423	.746
16	Giants	1631-1605	.504	3,236	1,631	1,605	109,910	13,573	27,634	5,554	677	2,904	12,901	9,780	1,037	24,124	1,506	603	122,556	43,254	9,135	947	882	769	2,508	.251	.316	.394	.710
17	Cubs	1630-1603	.504	3,234	1,630	1,603	109,886	14,493	27,763	5,628	588	3,587	13,796	10,465	1,327	25,874	1,708	691	123,318	45,328	9,803	884	756	694	2,351	.253	.323	.413	.736
18	Blue Jays	1640-1596	.507	3,236	1,640	1,596	110,332	15,066	28,220	5,926	415	3,973	14,405	10,420	1,107	23,643	1,546	562	123,172	46,895	10,314	459	854	427	2,580	.256	.324	.425	.749
19	Mets	1643-1594	.508	3,237	1,643	1,594	109,758	14,269	27,665	5,489	556	3,461	13,644	10,530	1,345	24,437	2,027	624	123,401	44,649	9,506	946	822	817	2,357	.252	.323	.407	.730
20	Angels	1657-1578	.512	3,235	1,657	1,578	109,985	14,634	28,117	5,369	498	3,532	13,942	9,804	1,135	23,659	2,102	806	122,372	45,078	9,399	573	875	680	2,516	.256	.321	.410	.731
21	Astros	1657-1576	.513	3,234	1,657	1,576	109,874	14,485	28,084	5,598	467	3,656	13,830	10,039	1,167	24,040	1,907	734	122,719	45,584	9,721	795	844	557	2,540	.256	.322	.415	.737
22	Phillies	1671-1564	.517	3,235	1,671	1,564	110,442	14,768	27,962	5,509	640	3,650	14,092	10,602	1,263	25,361	2,083	522	123,974	45,701	9,799	890	777	856	2,204	.253	.324	.414	.737
23	Brewers	1685-1551	.521	3,236	1,685	1,551	109,189	14,584	27,404	5,501	536	3,797	13,929	10,644	1,353	26,469	2,267	716	122,875	45,368	9,834	914	775	709	2,387	.251	.323	.415	.739
24	Rays	1691-1546	.522	3,237	1,691	1,546	109,605	14,547	27,562	5,530	622	3,607	13,848	10,730	1,317	26,444	2,499	896	122,984	45,157	9,759	456	876	488	2,197	.251	.323	.412	.735
25	Guardians	1690-1541	.523	3,231	1,690	1,541	109,765	14,725	28,000	5,888	489	3,419	14,037	10,616	1,263	24,169	2,037	655	123,196	45,123	9,796	611	941	617	2,371	.255	.325	.411	.736