The Washington Senators had the worst record by a team when playing 5+ seasons, with a record of 454-788.

Interpreted as:

worst MLB record in the five or more years

	TEAM	REC	SEAS	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	Senators	454-788	9	.366	1,265	454	788	43,645	6,912	11,886	1,615	787	357	5,764	4,269	575	3,492	1,975		48,963	16,146	2,759	474				.272	.345	.370	.715
2	Reds	125-217	5	.365	348	125	217	12,768	1,643	3,191	408	157	30		318					13,086	4,003	595					.250		.314
3	Colonels	993-1320	18	.429	2,355	993	1,320	82,256	12,464	21,505	2,816	1,292	436	8,508	6,080	757	3,638	3,474		89,787	28,213	4,544	609				.261	.319	.343	.662
4	Orioles	403-519	8	.437	944	403	519	32,654	4,964	7,699	1,083	504	136	2,635	2,289	208		1,451		35,293	10,198	1,723					.236	.293	.312	.605
5	Blues	242-299	6	.447	549	242	299	19,506	2,437	4,690	836	247	62		676					20,182	6,206	1,145					.240		.318
6	Marlins	2326-2745	33	.459	5,071	2,326	2,745	172,367	21,330	43,909	8,355	984	4,615	20,224	15,594	1,836	38,376	3,259	1,297	192,797	68,077	13,954	1,721	1,279	1,203	3,811	.255	.321	.395	.716
7	Rockies	2332-2749	33	.459	5,081	2,332	2,749	174,486	25,104	47,113	9,302	1,310	5,739	23,873	16,012	1,585	37,843	3,063	1,371	195,447	76,252	16,351	2,005	1,359	1,209	3,870	.270	.335	.437	.772
8	Metropolitans	270-309	5	.466	592	270	309	20,781	3,140	5,100	690	317	88	1,336	1,331	50		425		22,265	6,688	1,095					.245	.296	.322	.618
9	Padres	4162-4741	57	.467	8,905	4,162	4,741	301,030	36,092	75,057	13,282	1,761	7,271	33,939	28,653	2,128	59,554	6,011	2,606	337,778	113,674	22,314	3,715	2,252	2,687	6,508	.249	.317	.378	.694
10	Spiders	827-938	13	.469	1,802	827	938	63,232	10,057	17,006	2,308	961	292	8,238	5,871	580	3,144	2,800		70,233	22,112	3,561	550				.269	.337	.350	.686
11	Phillies	10244-11349	143	.474	21,708	10,244	11,349	742,787	96,402	193,416	33,433	6,680	14,208	86,622	67,788	5,419	105,441	14,974	2,916	830,929	282,833	54,321	11,917	3,018	3,739	9,867	.260	.326	.381	.706
12	Orioles	9143-10120	125	.475	19,373	9,143	10,120	658,061	83,643	169,806	29,349	4,913	14,442	77,334	63,319	4,480	98,450	10,565	2,785	739,499	252,307	48,704	10,532	3,107	2,576	10,852	.258	.326	.383	.709
13	Rangers	4847-5334	65	.476	10,187	4,847	5,334	347,720	45,815	89,662	15,976	1,893	10,207	43,291	32,923	2,703	65,290	5,958	2,850	389,145	140,045	28,076	2,964	2,835	2,251	7,799	.258	.324	.403	.727
14	Royals	4240-4652	57	.477	8,894	4,240	4,652	304,209	38,877	79,888	14,932	2,292	7,008	36,692	26,021	2,464	52,212	7,098	2,902	337,741	120,428	24,232	2,373	2,674	1,869	6,784	.263	.323	.396	.719
15	Mariners	3631-3977	49	.477	7,610	3,631	3,977	259,594	33,782	66,691	12,428	1,259	7,745	32,094	24,606	2,357	49,841	5,030	2,173	290,581	104,872	21,432	1,948	2,076	1,665	5,687	.257	.324	.404	.728
16	Twins	9292-9982	125	.482	19,383	9,292	9,982	661,230	85,231	173,404	29,775	6,334	12,030	78,470	62,395	5,173	94,579	12,020	3,082	742,157	251,937	48,139	10,190	3,169	2,664	10,979	.262	.329	.381	.710
17	Nationals	4293-4601	57	.483	8,898	4,293	4,601	300,944	37,288	76,361	14,740	1,792	7,615	35,048	28,289	2,635	57,267	6,556	2,781	338,037	117,530	24,147	3,880	2,289	2,882	6,510	.254	.321	.391	.712
18	Mets	4854-5171	64	.484	10,033	4,854	5,171	339,432	41,395	84,809	15,154	1,819	8,595	38,980	32,455	2,870	65,059	5,897	2,737	381,370	129,386	25,568	3,989	2,624	3,144	7,472	.250	.318	.381	.700
19	Bisons	314-333	7	.485	656	314	333	23,841	3,474	6,194	1,008	366	105	365	933					24,774	8,249	1,479					.260		.346
20	Athletics	9352-9898	125	.486	19,337	9,352	9,898	655,445	85,341	168,713	29,224	5,334	14,156	78,643	64,565	4,738	99,157	12,118	3,208	738,537	251,073	48,714	10,683	3,106	2,272	10,634	.257	.327	.383	.710
21	Brewers	4341-4559	57	.488	8,904	4,341	4,559	302,250	39,584	77,385	14,426	1,756	8,720	37,502	29,092	2,715	59,032	6,003	2,736	339,640	121,483	24,902	3,165	2,418	2,160	6,613	.256	.325	.402	.726
22	Diamondbacks	2116-2216	28	.488	4,332	2,116	2,216	147,809	19,809	37,664	7,734	1,069	4,629	18,877	14,395	1,430	32,701	2,515	903	166,167	61,423	13,432	1,325	1,208	1,091	3,090	.255	.324	.416	.740
23	Rays	2122-2208	28	.490	4,330	2,122	2,208	147,204	19,247	37,353	7,447	850	4,514	18,310	14,001	1,679	33,515	3,233	1,230	164,780	60,042	12,811	738	1,158	686	3,032	.254	.323	.408	.731
24	Wolverines	426-437	8	.494	880	426	437	31,647	4,849	8,116	1,241	537	264	2,412	1,880	84		654		33,611	11,223	2,042					.256	.300	.355	.655
25	Angels	5049-5147	65	.495	10,199	5,049	5,147	346,032	44,130	88,523	15,303	1,811	9,236	41,525	32,354	2,829	62,865	6,050	3,103	387,529	135,156	26,350	3,540	2,774	2,484	7,884	.256	.322	.391	.713