Between the 1970 and 1980 seasons, the Toronto Blue Jays had the worst record by a team, with a record of 233-413.

	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	Blue Jays	233-413	.361	646	233	413	21,843	2,432	5,485	949	167	419	2,246	1,843	115	2,940	235	235	24,230	8,025	1,535	286	143	122	530	.251	.311	.367	.678
2	Mariners	246-400	.381	647	246	400	21,851	2,559	5,574	908	157	466	2,400	1,946	104	2,923	475	228	24,410	8,194	1,531	316	193	136	520	.255	.316	.375	.691
3	Padres	740-1031	.418	1,772	740	1,031	59,691	6,343	14,476	2,226	404	1,078	5,882	5,539	294	9,908	1,182	571	66,986	20,744	3,708	1,083	379	658	1,209	.243	.308	.348	.656
4	Braves	806-963	.456	1,772	806	963	60,071	7,247	15,254	2,218	309	1,504	6,785	5,810	283	8,932	790	518	67,438	22,602	4,031	828	446	635	1,408	.254	.320	.376	.697
5	Indians	816-947	.463	1,763	816	947	59,721	7,122	15,318	2,250	332	1,343	6,652	5,590	326	8,183	863	718	66,915	22,261	3,925	769	509	427	1,470	.256	.321	.373	.694
6	Brewers	824-949	.465	1,774	824	949	59,718	7,301	15,162	2,507	391	1,503	6,877	5,701	314	9,651	991	678	67,044	22,960	4,401	847	464	448	1,280	.254	.320	.384	.704
7	Rangers	823-945	.465	1,771	823	945	60,010	7,228	15,328	2,349	314	1,234	6,766	6,066	350	8,923	1,179	676	67,731	22,007	3,897	795	510	518	1,437	.255	.325	.367	.692
8	White Sox	822-943	.466	1,770	822	943	59,986	7,188	15,554	2,438	387	1,298	6,687	5,509	401	8,711	894	611	67,084	22,660	4,123	669	519	463	1,441	.259	.323	.378	.701
9	Mets	830-945	.468	1,776	830	945	59,894	6,650	14,729	2,312	375	1,016	6,129	6,096	319	9,525	907	603	67,653	20,839	3,703	886	458	642	1,483	.246	.317	.348	.665
10	Expos	838-934	.473	1,773	838	934	59,695	6,977	14,852	2,481	385	1,234	6,456	5,888	389	9,497	1,105	603	67,409	21,805	4,100	997	440	705	1,302	.249	.318	.365	.683
11	Angels	846-926	.477	1,773	846	926	59,735	6,951	15,069	2,309	351	1,103	6,467	5,600	403	9,133	1,158	686	67,076	21,389	3,763	845	493	494	1,406	.252	.318	.358	.676
12	Cubs	849-925	.479	1,775	849	925	60,407	7,410	15,550	2,499	409	1,292	6,884	6,080	292	8,995	776	574	68,145	22,743	4,200	870	496	718	1,395	.257	.326	.376	.702
13	Giants	869-904	.490	1,773	869	904	59,826	7,357	15,034	2,436	441	1,334	6,791	6,334	307	9,767	1,130	557	67,820	22,354	4,211	885	468	724	1,308	.251	.324	.374	.697
14	Cardinals	874-901	.492	1,778	874	901	61,120	7,468	16,267	2,689	543	956	6,924	5,387	297	8,723	1,320	637	68,093	22,910	4,188	765	524	758	1,472	.266	.326	.375	.701
15	Tigers	873-898	.493	1,772	873	898	60,089	7,394	15,390	2,290	419	1,565	6,923	5,692	348	8,697	747	516	67,227	23,213	4,274	612	486	447	1,505	.256	.322	.386	.708
16	Astros	886-887	.500	1,774	886	887	60,281	7,165	15,408	2,513	541	1,036	6,651	5,543	300	9,095	1,558	680	67,457	22,111	4,090	860	473	710	1,284	.256	.319	.367	.686
17	Twins	889-878	.503	1,768	889	878	60,711	7,780	16,267	2,516	462	1,211	7,271	5,851	391	8,695	896	563	68,359	23,340	4,189	893	513	550	1,497	.268	.334	.384	.718
18	Phillies	903-872	.509	1,776	903	872	60,484	7,444	15,576	2,662	490	1,341	6,938	5,801	361	9,725	1,151	649	67,930	23,241	4,493	730	554	735	1,229	.258	.323	.384	.708
19	Athletics	921-851	.520	1,772	921	851	59,198	7,260	14,698	2,223	344	1,470	6,732	5,890	389	9,625	1,713	881	66,802	22,019	4,037	858	467	510	1,242	.248	.318	.372	.690
20	Royals	948-825	.535	1,773	948	825	60,521	7,864	16,037	2,796	578	1,116	7,366	5,863	346	7,992	1,714	759	67,954	23,337	4,490	619	605	517	1,327	.265	.330	.386	.716
21	Red Sox	978-791	.553	1,769	978	791	60,353	8,316	16,167	2,874	420	1,753	7,845	5,980	367	8,935	825	532	67,878	25,140	5,047	605	573	507	1,505	.268	.335	.417	.751
22	Yankees	995-774	.562	1,770	995	774	60,221	7,728	15,850	2,458	389	1,421	7,279	5,810	315	7,615	958	541	67,476	23,349	4,268	575	555	516	1,394	.263	.328	.388	.716
23	Pirates	999-774	.563	1,774	999	774	61,450	7,942	16,500	2,738	572	1,422	7,404	5,053	363	9,337	1,299	607	68,106	24,648	4,732	704	536	832	1,283	.269	.325	.401	.726
24	Dodgers	1002-772	.565	1,775	1,002	772	60,569	7,623	15,867	2,394	375	1,409	7,169	5,947	275	8,960	1,316	600	68,282	23,238	4,178	968	523	769	1,323	.262	.328	.384	.712
25	Reds	1042-730	.588	1,774	1,042	730	60,427	8,232	15,851	2,783	436	1,552	7,672	6,682	310	10,074	1,548	557	68,709	24,162	4,771	757	533	774	1,298	.262	.336	.400	.736