mlb team with worst record against a single opponent all-time 100 or more games played

The Kansas City Cowboys have the worst record by a team with 100+ games played, with a record of 30-91.

	TEAM	REC	1B	G	W%	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	Cowboys	30-91	723	126	.248	30	91	4,236	494	967	177	48	19	370	269		608	96		4,505	1,297	244					.228		.306
2	Gladiators	26-73	593	100	.263	26	73	3,475	492	769	116	47	13	328	328	31		182		3,834	1,018	176					.221	.294	.293	.587
3	Hoosiers	29-78	679	110	.271	29	78	3,813	462	890	129	62	20		125	22	561			3,960	1,203	211					.233	.262	.315	.577
4	Bisons	36-96	985	134	.273	36	96	4,795	793	1,249	180	64	20	630	541	96	367	160		5,432	1,617	264					.260	.347	.337	.684
5	Nationals	163-337	3,066	514	.326	163	337	17,337	2,160	3,944	533	220	125	1,647	1,246	127		1,040		18,710	5,292	878					.227	.284	.305	.589
6	Ruby Legs	90-159	1,646	252	.361	90	159	9,101	1,201	2,169	352	140	31		315					9,416	2,894	523					.238		.318
7	Cowboys	98-171	1,778	271	.364	98	171	9,535	1,431	2,256	304	137	37	1,052	718	123		729		10,376	2,945	478					.237	.298	.309	.607
8	Senators	454-788	9,127	1,265	.366	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
9	Reds	125-217	2,596	348	.365	125	217	12,768	1,643	3,191	408	157	30		318					13,086	4,003	595					.250		.314
10	Hoosiers	146-249	2,699	398	.370	146	249	13,870	2,050	3,536	570	138	129	1,577	913	131		936		14,914	4,769	837					.255	.307	.344	.651
11	Trojans	134-191	2,296	330	.412	134	191	11,951	1,542	2,929	456	151	26		414					12,365	3,765	633					.245		.315
12	Nationals	47-65	781	114	.420	47	65	3,926	572	931	120	26	4		118		558			4,044	1,115	150					.237		.284
13	Infants	55-75	1,036	131	.423	55	75	4,804	849	1,370	213	94	27	701	509	49	345	180		5,362	1,852	334					.285	.360	.386	.745
14	Terrapins	131-177	2,003	314	.425	131	177	10,180	1,195	2,609	418	120	68	1,016	957	83	1,184	280		11,579	3,471	606	359				.256	.325	.341	.666
15	Colonels	993-1320	16,961	2,355	.429	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
16	Stars	55-72	934	128	.433	55	72	4,469	698	1,158	151	59	14	487	457	35		292		4,961	1,469	224					.259	.333	.329	.661
17	Kelly's Killers	43-57	647	102	.430	43	57	3,574	549	838	105	58	28	407	428	36	385	164		4,038	1,143	191					.234	.322	.320	.642
18	Blue Stockings	46-58	650	110	.442	46	58	3,712	463	859	153	48	8		157	26	545			3,895	1,132	209					.231	.268	.305	.572
19	Orioles	403-519	5,976	944	.437	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
20	Orioles	118-153	2,010	276	.435	118	153	9,349	1,476	2,666	381	218	57	1,231	786	106	797	396		10,459	3,654	656	218				.285	.347	.391	.738
21	Blues	242-299	3,545	549	.447	242	299	19,506	2,437	4,690	836	247	62		676					20,182	6,206	1,145					.240		.318
22	Rockies	2364-2814	31,298	5,178	.457	2,364	2,814	177,746	25,500	47,931	9,460	1,331	5,842	24,255	16,237	1,612	38,736	3,119	1,396	198,996	77,579	16,633	2,019	1,382	1,209	3,947	.270	.334	.436	.770
23	Marlins	2380-2791	30,534	5,171	.460	2,380	2,791	175,807	21,791	44,779	8,525	1,003	4,717	20,663	15,883	1,871	39,120	3,345	1,321	196,597	69,461	14,245	1,727	1,309	1,211	3,868	.255	.321	.395	.716
24	Metropolitans	270-309	4,005	592	.466	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
25	Padres	4214-4789	53,329	9,005	.468	4,214	4,789	304,394	36,524	75,910	13,444	1,772	7,365	34,352	28,968	2,170	60,282	6,073	2,624	341,558	114,993	22,581	3,748	2,278	2,699	6,573	.249	.317	.378	.695