Between the 1998 and 2011 seasons, the Kansas City Royals had the worst record by a team, with a record of 946-1320.

	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	946-1320	.417	2,266	946	1,320	78,205	10,418	21,003	4,067	534	1,905	9,842	6,476	801	13,682	1,441	607	86,828	31,853	6,506	639	707	397	1,883	.269	.328	.407	.735
2	Pirates	957-1307	.423	2,265	957	1,307	76,948	9,612	19,687	3,990	438	1,993	9,157	6,796	943	15,742	1,236	556	86,241	30,532	6,421	947	607	534	1,676	.256	.322	.397	.718
3	Orioles	990-1276	.437	2,268	990	1,276	78,223	10,498	20,887	4,137	307	2,374	9,998	7,038	781	13,424	1,414	581	87,207	32,760	6,818	500	665	430	1,907	.267	.331	.419	.750
4	Nationals	993-1273	.438	2,266	993	1,273	76,565	9,539	19,539	4,089	432	2,056	9,068	7,157	787	15,355	1,254	629	86,151	30,660	6,577	1,091	551	671	1,795	.255	.323	.400	.724
5	Rays	1013-1252	.447	2,265	1,013	1,252	77,408	10,206	20,114	3,972	490	2,199	9,707	7,285	791	15,734	1,853	718	86,630	31,663	6,661	518	628	414	1,622	.260	.327	.409	.736
6	Tigers	1039-1228	.458	2,267	1,039	1,228	78,209	10,543	20,850	4,015	571	2,423	10,055	6,732	738	15,056	1,177	600	86,898	33,276	7,009	573	646	416	1,750	.267	.328	.425	.754
7	Brewers	1062-1204	.469	2,267	1,062	1,204	77,153	10,240	19,863	4,077	399	2,506	9,793	7,606	956	16,671	1,228	536	87,190	32,256	6,982	887	588	637	1,731	.257	.329	.418	.747
8	Rockies	1074-1195	.473	2,269	1,074	1,195	78,130	11,556	21,445	4,298	591	2,496	10,968	7,835	735	15,428	1,324	616	88,445	34,413	7,385	1,096	649	645	1,749	.274	.344	.440	.784
9	Marlins	1081-1185	.477	2,266	1,081	1,185	77,400	10,150	20,195	4,110	479	2,198	9,609	7,320	868	16,385	1,536	648	87,126	31,857	6,787	923	615	630	1,629	.261	.329	.412	.741
10	Reds	1094-1175	.482	2,271	1,094	1,175	77,665	10,582	20,122	4,064	341	2,627	10,108	7,819	858	16,578	1,399	566	87,909	32,749	7,032	984	583	639	1,646	.259	.331	.422	.753
11	Padres	1102-1167	.486	2,269	1,102	1,167	77,079	9,797	19,514	3,805	440	2,021	9,313	8,057	659	15,990	1,401	548	87,203	30,262	6,266	769	639	598	1,723	.253	.327	.393	.719
12	Cubs	1110-1157	.490	2,267	1,110	1,157	77,706	10,410	20,349	4,053	416	2,538	9,916	7,393	681	15,808	1,026	484	87,388	32,848	7,007	1,025	583	629	1,769	.262	.329	.423	.752
13	Mariners	1120-1147	.494	2,267	1,120	1,147	78,106	10,488	20,796	3,929	372	2,221	9,962	7,255	703	14,556	1,631	577	87,326	32,132	6,522	587	675	577	1,685	.266	.332	.411	.743
14	Diamondbacks	1129-1139	.498	2,268	1,129	1,139	77,354	10,399	19,979	4,098	565	2,420	9,941	7,734	723	15,888	1,230	514	87,267	32,467	7,083	819	637	685	1,613	.258	.329	.420	.749
15	Blue Jays	1143-1124	.504	2,268	1,143	1,124	78,301	11,100	20,810	4,465	385	2,672	10,605	7,317	917	14,854	1,250	504	87,574	34,061	7,522	371	668	450	1,814	.266	.333	.435	.768
16	Rangers	1145-1123	.505	2,268	1,145	1,123	79,031	11,995	21,734	4,391	423	2,958	11,434	7,432	708	14,976	1,259	493	88,368	35,845	7,772	497	700	471	1,789	.275	.340	.454	.794
17	Indians	1151-1117	.507	2,268	1,151	1,117	78,143	11,401	20,951	4,369	390	2,569	10,871	8,079	913	15,740	1,244	573	88,380	33,807	7,328	556	689	495	1,800	.268	.341	.433	.774
18	Twins	1153-1114	.509	2,268	1,153	1,114	78,163	10,541	21,056	4,162	511	1,936	9,934	7,154	690	13,799	1,417	635	87,189	32,048	6,609	492	690	541	1,993	.269	.333	.410	.743
19	Mets	1156-1111	.510	2,267	1,156	1,111	77,188	10,228	20,120	3,969	408	2,186	9,696	7,796	709	14,639	1,627	577	87,360	31,463	6,563	1,018	649	756	1,745	.261	.332	.408	.739
20	Astros	1163-1104	.513	2,268	1,163	1,104	77,303	10,571	20,354	4,078	410	2,350	10,063	7,665	871	15,034	1,429	592	87,481	32,302	6,838	1,011	631	650	1,842	.263	.334	.418	.752
21	White Sox	1179-1089	.520	2,270	1,179	1,089	77,491	11,169	20,657	3,940	337	2,845	10,686	7,219	833	13,738	1,438	678	86,853	33,806	7,122	647	663	389	1,834	.267	.333	.436	.769
22	Dodgers	1184-1083	.522	2,267	1,184	1,083	77,189	10,097	20,102	3,686	428	2,195	9,607	7,433	738	14,536	1,549	634	86,936	31,229	6,309	974	602	678	1,746	.260	.329	.405	.733
23	Phillies	1201-1066	.530	2,267	1,201	1,066	78,096	11,017	20,495	4,193	500	2,494	10,492	8,417	842	15,637	1,558	425	88,858	33,170	7,187	868	635	812	1,601	.262	.338	.425	.763
24	Athletics	1206-1060	.532	2,266	1,206	1,060	77,564	10,886	20,049	4,133	306	2,376	10,358	8,554	794	14,739	1,088	396	87,998	31,922	6,815	415	671	426	1,879	.258	.336	.412	.747
25	Giants	1208-1058	.533	2,267	1,208	1,058	77,303	10,471	20,333	4,117	474	2,292	9,942	7,858	723	14,127	1,091	519	87,585	32,274	6,883	1,044	657	929	1,853	.263	.334	.417	.752