Between the 1969 and 1997 seasons, the Seattle Mariners had the worst record by a team, with a record of 1469-1809.

	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	Mariners	1469-1809	.448	3,280	1,469	1,809	111,801	14,469	29,114	5,327	632	3,084	13,699	10,795	770	17,558	2,233	1,161	125,407	44,957	9,043	1,101	940	837	2,587	.260	.327	.402	.729
2	Padres	2067-2504	.452	4,573	2,067	2,504	154,900	17,735	38,849	6,248	985	3,103	16,490	14,153	803	26,366	3,271	1,618	173,412	56,376	10,336	2,433	1,123	1,759	3,368	.251	.315	.364	.679
3	Indians	2146-2404	.472	4,552	2,146	2,404	155,555	19,957	41,032	6,664	849	3,809	18,705	14,731	895	22,783	3,072	1,731	174,200	60,821	11,322	1,607	1,412	1,127	3,785	.264	.328	.391	.719
4	Marlins	354-390	.476	744	354	390	25,224	3,150	6,500	1,103	142	618	2,982	2,603	256	4,912	527	239	28,572	9,741	1,863	281	208	206	578	.258	.331	.386	.717
5	Rangers	2177-2381	.478	4,563	2,177	2,381	155,521	19,863	40,424	6,757	891	3,810	18,642	15,280	953	25,419	2,862	1,604	174,710	60,393	11,458	1,637	1,319	1,225	3,662	.260	.327	.388	.716
6	Cubs	2194-2363	.481	4,565	2,194	2,363	155,965	19,455	40,247	6,785	1,050	3,749	18,182	14,416	812	25,319	2,776	1,493	174,535	60,379	11,584	2,072	1,270	1,689	3,338	.258	.322	.387	.709
7	Brewers	2200-2367	.482	4,570	2,200	2,367	155,611	20,203	40,437	7,010	1,037	3,789	18,992	14,680	932	24,420	3,135	1,734	174,383	60,888	11,836	1,784	1,376	1,156	3,354	.260	.325	.391	.716
8	Angels	2218-2353	.485	4,573	2,218	2,353	155,024	19,399	39,702	6,396	825	3,662	18,113	15,098	1,031	24,945	2,741	1,634	174,396	58,734	10,883	1,982	1,261	1,216	3,644	.256	.324	.379	.703
9	Rockies	363-384	.486	747	363	384	25,710	4,000	7,229	1,309	218	927	3,771	2,339	270	4,816	700	333	28,881	11,755	2,454	356	206	195	595	.281	.345	.457	.802
10	Twins	2227-2336	.488	4,565	2,227	2,336	156,845	20,546	42,089	7,284	1,108	3,563	19,267	14,527	1,143	23,561	2,548	1,484	175,390	62,278	11,955	1,526	1,349	1,255	3,886	.268	.332	.397	.729
11	Phillies	2238-2331	.490	4,573	2,238	2,331	155,396	19,286	39,690	7,016	1,154	3,534	18,021	15,367	955	27,141	3,154	1,487	174,900	59,616	11,704	1,856	1,326	1,739	3,271	.255	.324	.384	.707
12	White Sox	2239-2316	.492	4,562	2,239	2,316	155,104	20,025	40,551	6,702	1,051	3,754	18,789	14,978	1,033	23,825	2,938	1,531	174,259	60,617	11,507	1,716	1,428	1,271	3,552	.261	.328	.391	.719
13	Blue Jays	1612-1666	.492	3,280	1,612	1,666	112,418	14,570	29,368	5,472	884	2,951	13,674	10,177	828	18,001	2,336	1,115	125,254	45,461	9,307	873	958	740	2,496	.261	.325	.404	.729
14	Braves	2246-2311	.493	4,562	2,246	2,311	154,587	19,214	39,352	6,315	816	4,022	17,998	15,069	790	24,759	2,682	1,588	173,771	59,365	11,153	2,147	1,178	1,613	3,517	.255	.322	.384	.706
15	Expos	2254-2310	.494	4,568	2,254	2,310	154,602	18,499	39,027	7,115	1,050	3,305	17,193	14,579	1,074	25,760	3,917	1,721	173,712	58,157	11,470	2,257	1,200	1,782	3,203	.252	.319	.376	.695
16	Mets	2261-2301	.496	4,565	2,261	2,301	154,431	18,525	38,678	6,522	902	3,353	17,280	15,047	883	26,256	2,943	1,510	173,756	57,063	10,777	2,114	1,281	1,686	3,373	.250	.318	.370	.688
17	Giants	2272-2301	.497	4,573	2,272	2,301	154,939	19,387	39,051	6,484	1,044	3,774	18,035	15,781	983	27,517	3,189	1,656	175,161	58,945	11,302	2,282	1,176	1,895	3,193	.252	.323	.380	.703
18	Tigers	2286-2282	.500	4,569	2,286	2,282	155,549	20,742	40,071	6,580	994	4,657	19,520	16,187	954	25,792	2,372	1,412	175,392	62,610	12,231	1,378	1,324	1,135	3,515	.258	.329	.403	.731
19	Astros	2307-2265	.505	4,573	2,307	2,265	155,219	18,793	39,573	6,914	1,218	2,894	17,515	14,771	987	25,328	4,109	1,814	174,449	57,605	11,026	2,185	1,287	1,821	3,103	.255	.321	.371	.692
20	Cardinals	2312-2251	.507	4,570	2,312	2,251	155,662	19,084	40,687	7,003	1,320	2,558	17,780	14,726	778	24,533	4,587	1,930	174,538	58,004	10,881	2,040	1,332	1,754	3,401	.261	.326	.373	.698
21	Royals	2335-2226	.512	4,563	2,335	2,226	155,867	19,865	41,069	7,424	1,326	3,231	18,673	14,264	968	23,334	4,047	1,825	173,888	60,838	11,981	1,391	1,398	1,216	3,399	.263	.326	.390	.717
22	Athletics	2341-2228	.512	4,569	2,341	2,228	154,248	20,258	39,087	6,331	782	4,295	18,932	16,205	1,072	26,341	4,103	1,899	174,646	59,867	11,408	1,738	1,383	1,145	3,402	.253	.326	.388	.714
23	Pirates	2363-2197	.518	4,564	2,363	2,197	156,562	19,811	41,165	7,329	1,291	3,428	18,549	14,004	926	25,403	3,438	1,623	174,945	61,360	12,048	2,049	1,404	1,890	3,282	.263	.324	.392	.716
24	Red Sox	2431-2134	.533	4,566	2,431	2,134	156,993	21,725	42,577	7,984	948	4,330	20,522	16,038	1,097	23,606	1,881	1,228	177,046	65,447	13,262	1,486	1,432	1,363	4,061	.271	.340	.417	.757
25	Dodgers	2457-2112	.538	4,572	2,457	2,112	155,502	19,007	40,107	6,152	887	3,564	17,786	14,689	746	25,182	3,517	1,640	174,723	58,725	10,603	2,527	1,259	1,805	3,249	.258	.323	.378	.700