Between the 2002 and 2009 seasons, the Kansas City Royals had the worst record by a team, with a record of 530-766.

	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	530-766	.409	1,296	530	766	44,407	5,834	11,719	2,337	306	1,068	5,489	3,636	511	8,117	690	333	49,269	17,872	3,711	356	359	227	1,063	.264	.324	.402	.727
2	Pirates	550-743	.425	1,293	550	743	44,139	5,540	11,408	2,308	245	1,153	5,292	3,847	592	8,832	591	260	49,465	17,665	3,706	530	357	321	974	.258	.324	.400	.724
3	Orioles	561-734	.433	1,296	561	734	44,861	6,028	12,054	2,426	195	1,313	5,737	3,882	430	7,566	805	310	49,843	18,809	3,934	295	375	250	1,048	.269	.330	.419	.750
4	Rays	563-731	.435	1,294	563	731	44,363	5,900	11,626	2,301	301	1,328	5,620	4,011	455	8,962	1,128	389	49,476	18,513	3,930	262	385	256	889	.262	.327	.417	.744
5	Nationals	576-719	.445	1,295	576	719	43,815	5,490	11,208	2,352	237	1,134	5,231	4,353	460	8,696	718	354	49,594	17,436	3,723	638	328	413	1,058	.256	.327	.398	.725
6	Tigers	584-712	.451	1,296	584	712	44,677	5,989	11,876	2,217	341	1,409	5,717	3,724	420	8,693	613	319	49,534	19,002	3,967	348	365	227	1,009	.266	.326	.425	.751
7	Reds	600-696	.463	1,297	600	696	44,111	5,882	11,183	2,291	169	1,533	5,623	4,558	516	9,711	747	285	50,057	18,411	3,993	570	302	370	928	.254	.329	.417	.746
8	Brewers	600-695	.463	1,295	600	695	43,926	5,767	11,263	2,373	233	1,436	5,520	4,281	565	9,624	753	307	49,607	18,410	4,042	493	342	378	1,029	.256	.328	.419	.747
9	Padres	614-683	.473	1,297	614	683	44,302	5,539	11,350	2,222	259	1,160	5,267	4,503	391	8,796	594	253	50,041	17,570	3,641	475	370	331	1,024	.256	.328	.397	.724
10	Rockies	614-683	.473	1,297	614	683	44,357	6,428	11,953	2,472	308	1,380	6,097	4,606	448	9,207	707	328	50,414	19,181	4,160	657	346	364	1,019	.269	.342	.432	.774
11	Diamondbacks	628-668	.485	1,296	628	668	44,189	5,772	11,377	2,414	323	1,306	5,530	4,415	395	8,799	633	259	49,871	18,355	4,043	490	382	391	980	.257	.328	.415	.743
12	Mariners	630-666	.486	1,296	630	666	44,899	5,867	12,089	2,255	221	1,166	5,546	3,804	418	7,854	823	316	49,810	18,284	3,642	322	367	359	1,031	.269	.330	.407	.737
13	Rangers	632-664	.488	1,296	632	664	45,081	6,730	12,122	2,539	247	1,736	6,446	4,112	442	9,063	634	220	50,269	20,363	4,522	256	378	265	949	.269	.333	.452	.785
14	Indians	635-661	.490	1,296	635	661	44,614	6,345	11,852	2,542	215	1,447	6,071	4,405	568	8,994	582	313	50,275	19,165	4,204	315	373	296	1,052	.266	.337	.430	.766
15	Mets	639-655	.494	1,294	639	655	44,096	5,846	11,498	2,254	253	1,288	5,541	4,214	417	8,317	1,023	297	49,689	18,122	3,795	606	356	438	1,011	.261	.329	.411	.740
16	Blue Jays	642-653	.496	1,295	642	653	44,685	6,275	11,949	2,593	240	1,357	5,983	4,183	517	8,177	513	214	49,991	19,093	4,190	190	416	233	1,114	.267	.334	.427	.762
17	Cubs	654-640	.505	1,294	654	640	44,531	5,952	11,772	2,425	229	1,463	5,673	4,108	374	8,780	617	269	49,911	19,044	4,117	567	331	351	1,033	.264	.329	.428	.757
18	Marlins	656-639	.507	1,295	656	639	44,174	5,975	11,686	2,400	273	1,329	5,647	4,250	531	9,172	885	383	49,871	18,619	4,002	567	349	408	953	.265	.334	.421	.755
19	Astros	667-628	.515	1,296	667	628	44,029	5,863	11,476	2,296	241	1,356	5,600	4,246	496	8,337	712	296	49,717	18,322	3,893	605	341	371	1,046	.261	.330	.416	.746
20	Giants	668-625	.517	1,294	668	625	44,007	5,763	11,520	2,344	292	1,199	5,456	4,215	416	7,716	604	248	49,594	18,045	3,835	598	358	597	1,087	.262	.330	.410	.740
21	White Sox	679-618	.524	1,297	679	618	44,166	6,349	11,646	2,211	163	1,724	6,107	4,116	484	8,143	718	354	49,478	19,355	4,098	349	363	220	1,036	.264	.331	.438	.769
22	Dodgers	690-606	.532	1,296	690	606	44,327	5,768	11,678	2,188	266	1,195	5,512	4,174	452	8,034	843	339	49,808	17,983	3,649	530	325	408	1,071	.263	.331	.406	.737
23	Athletics	697-598	.538	1,295	697	598	44,522	6,050	11,510	2,380	169	1,331	5,784	4,725	431	8,153	506	187	50,241	18,221	3,880	190	373	247	1,104	.259	.333	.409	.742
24	Phillies	699-596	.540	1,295	699	596	44,713	6,524	11,797	2,458	279	1,580	6,218	5,017	545	9,146	877	223	51,112	19,553	4,317	487	350	518	917	.264	.343	.437	.780
25	Twins	709-588	.547	1,297	709	588	44,797	6,202	12,199	2,362	296	1,191	5,851	4,098	421	7,787	791	342	50,063	18,726	3,849	332	415	338	1,146	.272	.336	.418	.754