The Washington Nationals have the worst OPS by a team in a season, with an OPS of .500 in 1884.

	TEAM	OPS	SEASON	G	W%	W	L	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	PA	TB	XBH	SH	AVG	OBP	SLG
1	Nationals	.500	1884	63	.190	12	51	2,166	248	434	61	24	6		100	16	377		2,282	561	91		.200	.241	.259
2	Alleghenys	.516	1884	110	.278	30	78	3,689	406	777	105	50	2		143	41	411		3,873	988	157		.211	.248	.268
3	Nationals	.526	1888	136	.358	48	86	4,546	482	944	98	49	30	373	246	43	499	331	4,835	1,230	177		.208	.255	.271
4	Orioles	.527	1886	139	.366	48	83	4,639	625	945	124	51	8	417	379	36	603	269	5,054	1,195	183		.204	.269	.258
5	White Sox	.536	1910	156	.444	68	85	5,024	456	1,058	115	58	7	351	403	44	648	183	5,660	1,310	180	189	.211	.275	.261
6	Superbas	.543	1908	154	.344	53	101	4,897	375	1,044	110	60	28	306	323	29	608	113	5,415	1,358	198	166	.213	.266	.277
7	Senators	.551	1909	156	.276	42	110	4,983	382	1,113	149	41	9	306	321	42	618	136	5,541	1,371	199	195	.223	.276	.275
8	Alleghenys	.553	1888	139	.493	66	68	4,713	534	1,070	150	49	14	390	194	46	583	287	4,953	1,360	213		.227	.264	.289
9	Cardinals	.554	1908	154	.318	49	105	4,959	372	1,105	134	57	17	301	282	45	623	150	5,450	1,404	208	164	.223	.271	.283
10	Atlantics	.555	1884	109	.385	40	64	3,763	476	845	112	47	16		179	16	417		3,958	1,099	175		.225	.263	.292
11	Browns	.556	1910	158	.305	47	107	5,077	454	1,105	131	60	12	347	415	36	841	169	5,671	1,392	203	143	.218	.281	.274
12	Doves	.559	1909	155	.294	45	108	5,017	428	1,121	125	43	14	338	400	30	551	135	5,629	1,374	182	182	.223	.285	.274
13	Cowboys	.561	1888	132	.326	43	89	4,588	579	1,000	142	61	19	431	288	57	598	257	4,933	1,321	222		.218	.273	.288
14	Senators	.564	1904	157	.252	38	113	5,149	437	1,170	171	57	10	348	283	59	756	150	5,606	1,485	238	115	.227	.275	.288
15	White Sox	.566	1909	159	.513	78	74	5,018	494	1,109	145	56	4	393	441	57	596	211	5,759	1,378	205	243	.221	.291	.275
16	Browns	.566	1909	154	.407	61	89	4,964	443	1,151	116	45	10	351	331	51	607	136	5,487	1,387	171	141	.232	.287	.279
17	Quakers	.566	1888	132	.531	69	61	4,528	535	1,021	151	46	16	418	268	51	485	246	4,847	1,312	213		.225	.276	.290
18	Beaneaters	.567	1906	152	.325	49	102	4,925	408	1,115	136	43	16	330	356	52	681	93	5,452	1,385	195	119	.226	.286	.281
19	Metropolitans	.568	1886	137	.393	53	82	4,683	628	1,047	108	72	18	425	330	33	578	120	5,046	1,353	198		.224	.279	.289
20	White Sox	.569	1908	156	.579	88	64	5,027	535	1,127	145	41	3	430	463	62	577	209	5,788	1,363	189	236	.224	.298	.271
21	Virginians	.569	1884	46	.286	12	30	1,469	194	326	40	33	7		53	24	282		1,546	453	80		.222	.261	.308
22	Giants	.570	1902	141	.353	48	88	4,632	405	1,097	147	34	6	338	254	40	544	187	5,034	1,330	187	108	.237	.282	.287
23	Cardinals	.571	1907	155	.340	52	101	5,008	419	1,163	121	52	18	331	312	42	615	125	5,518	1,442	191	156	.232	.283	.288
24	Athletics	.572	1908	157	.444	68	85	5,065	487	1,131	183	50	21	392	368	37	595	116	5,656	1,477	254	186	.223	.281	.292
25	Americans	.572	1907	155	.396	59	90	5,235	466	1,224	154	48	18	405	305	35	596	125	5,721	1,528	220	146	.234	.281	.292