The Toronto Blue Jays have the worst record by a team, with a record of 3774-3804.

	TEAM	REC	SEASON	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	54-107	1977	.335	161	54	107	5,419	605	1,367	230	41	100	553	499	23	819	65	55	6,056	1,979	371	81	34	34	156	.252	.316	.365	.681
2	Blue Jays	59-102	1978	.366	161	59	102	5,430	590	1,358	217	39	98	551	448	23	645	28	52	6,015	1,947	354	77	37	23	124	.250	.308	.359	.667
3	Blue Jays	53-109	1979	.327	162	53	109	5,423	613	1,362	253	34	95	562	448	36	663	75	56	6,010	1,968	382	65	38	21	131	.251	.311	.363	.673
4	Blue Jays	67-95	1980	.414	162	67	95	5,571	624	1,398	249	53	126	580	448	33	813	67	72	6,149	2,131	428	63	34	44	119	.251	.309	.383	.691
5	Blue Jays	37-69	1981	.349	106	37	69	3,521	329	797	137	23	61	314	284	20	556	66	57	3,887	1,163	221	44	18	23	72	.226	.286	.330	.617
6	Blue Jays	78-84	1982	.481	162	78	84	5,526	651	1,447	262	45	106	605	415	28	749	118	81	6,067	2,117	413	48	50	38	107	.262	.314	.383	.697
7	Blue Jays	89-73	1983	.549	162	89	73	5,581	795	1,546	268	58	167	748	510	32	810	131	72	6,213	2,431	493	36	54	44	117	.277	.338	.436	.774
8	Blue Jays	89-73	1984	.549	163	89	73	5,687	750	1,555	275	68	143	702	460	52	816	193	67	6,283	2,395	486	35	49	46	91	.273	.331	.421	.752
9	Blue Jays	99-62	1985	.615	161	99	62	5,508	759	1,482	281	53	158	714	503	30	807	144	77	6,106	2,343	492	21	44	44	121	.269	.331	.425	.757
10	Blue Jays	86-76	1986	.531	163	86	76	5,716	809	1,540	285	35	181	767	496	33	848	110	59	6,318	2,438	501	24	49	23	122	.269	.329	.427	.755
11	Blue Jays	96-66	1987	.593	162	96	66	5,635	845	1,514	277	38	215	790	555	38	970	126	50	6,293	2,512	530	30	35	45	136	.269	.336	.446	.782
12	Blue Jays	87-75	1988	.537	162	87	75	5,557	763	1,491	271	47	158	706	521	31	935	107	36	6,193	2,330	476	34	50	35	145	.268	.332	.419	.751
13	Blue Jays	89-73	1989	.549	162	89	73	5,581	731	1,449	265	40	142	685	521	31	923	144	58	6,216	2,220	447	30	53	32	124	.260	.323	.398	.721
14	Blue Jays	86-76	1990	.531	162	86	76	5,589	767	1,479	263	50	167	729	526	28	970	111	52	6,223	2,343	480	18	62	35	125	.265	.328	.419	.747
15	Blue Jays	91-71	1991	.562	162	91	71	5,489	684	1,412	295	45	133	649	499	58	1,043	148	53	6,167	2,196	473	56	65	49	108	.257	.322	.400	.722
16	Blue Jays	96-66	1992	.593	162	96	66	5,536	780	1,458	265	40	163	737	561	47	933	129	39	6,224	2,292	468	26	54	41	123	.263	.333	.414	.747
17	Blue Jays	95-67	1993	.586	162	95	67	5,579	847	1,556	317	42	159	796	588	52	861	170	49	6,319	2,434	518	46	54	57	138	.279	.350	.436	.786
18	Blue Jays	55-60	1994	.478	115	55	60	3,962	566	1,064	210	30	115	534	387	38	691	79	26	4,461	1,679	355	30	44	34	96	.269	.336	.424	.760
19	Blue Jays	56-88	1995	.389	144	56	88	5,036	642	1,309	275	27	140	613	492	44	906	75	16	5,650	2,058	442	33	45	27	119	.260	.328	.409	.737
20	Blue Jays	74-88	1996	.457	162	74	88	5,599	766	1,451	302	35	177	712	529	92	1,105	116	38	6,295	2,354	514	38	37	19	120	.259	.331	.420	.752
21	Blue Jays	76-86	1997	.469	162	76	86	5,473	654	1,333	275	41	147	627	487	59	1,138	134	50	6,109	2,131	463	38	52	26	102	.244	.310	.389	.699
22	Blue Jays	88-74	1998	.543	163	88	74	5,580	816	1,482	316	19	221	776	564	87	1,132	184	81	6,323	2,499	556	43	49	43	108	.266	.340	.448	.787
23	Blue Jays	84-78	1999	.519	162	84	78	5,642	883	1,580	337	14	212	856	578	76	1,077	119	48	6,369	2,581	563	28	45	29	129	.280	.352	.457	.810
24	Blue Jays	83-79	2000	.512	162	83	79	5,677	861	1,562	328	21	244	826	526	60	1,026	89	34	6,326	2,664	593	29	34	32	130	.275	.341	.469	.810
25	Blue Jays	80-82	2001	.494	162	80	82	5,663	767	1,489	287	36	195	728	470	74	1,094	156	55	6,284	2,433	518	34	43	47	111	.263	.325	.430	.755
	Total	3774-3804		.498	7,581	3,774	3,804	259,737	35,036	67,541	13,501	1,491	8,232	33,230	24,082	2,420	48,833	4,564	1,961	289,855	108,720	23,224	1,496	2,120	1,395	5,915	.260	.326	.419	.745