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 during 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	2317-2731	33	.459	5,048	2,317	2,731	171,596	21,249	43,719	8,318	979	4,596	20,145	15,514	1,831	38,212	3,243	1,289	191,932	67,783	13,893	1,717	1,274	1,203	3,792	.255	.321	.395	.716
7	Rockies	2327-2728	33	.460	5,055	2,327	2,728	173,628	25,023	46,923	9,265	1,304	5,715	23,793	15,951	1,578	37,604	3,050	1,364	194,512	75,941	16,284	2,002	1,353	1,208	3,854	.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	4150-4730	57	.467	8,882	4,150	4,730	300,249	35,989	74,872	13,249	1,757	7,248	33,844	28,584	2,123	59,395	6,001	2,603	336,910	113,379	22,254	3,709	2,245	2,685	6,496	.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	10228-11341	143	.474	21,684	10,228	11,341	741,963	96,287	193,206	33,395	6,677	14,180	86,512	67,707	5,410	105,254	14,952	2,912	830,006	282,495	54,252	11,915	3,011	3,739	9,858	.260	.326	.381	.706
12	Orioles	9133-10106	125	.475	19,349	9,133	10,106	657,229	83,548	169,592	29,306	4,909	14,422	77,245	63,252	4,471	98,239	10,540	2,779	738,580	251,982	48,637	10,530	3,098	2,574	10,834	.258	.326	.383	.709
13	Rangers	4836-5321	65	.476	10,163	4,836	5,321	346,955	45,733	89,507	15,955	1,891	10,180	43,211	32,854	2,694	65,082	5,931	2,845	388,295	139,784	28,026	2,963	2,829	2,250	7,791	.258	.325	.403	.727
14	Royals	4230-4639	57	.477	8,871	4,230	4,639	303,420	38,802	79,681	14,895	2,284	6,999	36,620	25,979	2,456	52,048	7,082	2,893	336,887	120,141	24,178	2,366	2,666	1,865	6,774	.263	.323	.396	.719
15	Mariners	3621-3964	49	.477	7,587	3,621	3,964	258,814	33,703	66,519	12,406	1,258	7,716	32,016	24,543	2,348	49,619	5,019	2,167	289,724	104,589	21,380	1,945	2,074	1,664	5,672	.257	.325	.404	.729
16	Twins	9276-9975	125	.482	19,360	9,276	9,975	660,438	85,125	173,207	29,741	6,331	12,003	78,369	62,329	5,154	94,377	12,008	3,079	741,273	251,619	48,075	10,189	3,163	2,661	10,965	.262	.329	.381	.710
17	Nationals	4282-4590	57	.483	8,876	4,282	4,590	300,209	37,188	76,180	14,693	1,788	7,593	34,952	28,234	2,620	57,104	6,541	2,772	337,224	117,228	24,074	3,877	2,284	2,880	6,491	.254	.321	.390	.712
18	Mets	4840-5162	64	.484	10,010	4,840	5,162	338,680	41,307	84,630	15,121	1,816	8,568	38,894	32,378	2,853	64,870	5,875	2,734	380,514	129,087	25,505	3,987	2,616	3,137	7,451	.250	.318	.381	.699
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	9349-9877	125	.486	19,313	9,349	9,877	654,624	85,246	168,508	29,180	5,332	14,128	78,550	64,481	4,730	98,937	12,101	3,205	737,620	250,736	48,640	10,682	3,103	2,269	10,609	.257	.327	.383	.710
21	Brewers	4327-4549	57	.487	8,880	4,327	4,549	301,429	39,480	77,190	14,389	1,755	8,696	37,402	29,009	2,707	58,830	5,968	2,728	338,720	121,177	24,840	3,161	2,414	2,158	6,607	.256	.325	.402	.727
22	Diamondbacks	2106-2203	28	.489	4,309	2,106	2,203	147,013	19,691	37,450	7,692	1,063	4,591	18,761	14,330	1,416	32,541	2,495	899	165,285	61,041	13,346	1,324	1,202	1,088	3,076	.255	.324	.415	.740
23	Rays	2107-2199	28	.489	4,306	2,107	2,199	146,401	19,121	37,147	7,407	850	4,481	18,191	13,933	1,671	33,323	3,190	1,219	163,895	59,697	12,738	737	1,153	685	3,021	.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	5036-5135	65	.495	10,174	5,036	5,135	345,188	44,014	88,325	15,266	1,808	9,198	41,415	32,282	2,819	62,620	6,044	3,099	386,593	134,801	26,272	3,537	2,767	2,483	7,871	.256	.322	.391	.713