highest on-base percentage for one team in a season all-time

The Baltimore Orioles have the highest on-base percentage by a team in a season, with an on-base percentage of .418 in 1894.

	TEAM	OBP	SEASON	G	W%	W	L	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	GIDP	AVG	SLG	OPS
1	Orioles	.418	1894	129	.695	89	39	4,799	1,171	1,647	271	150	33	976	516	98	200	324		5,564	2,317	454	151		.343	.483	.901
2	Phillies	.415	1894	132	.555	71	57	5,089	1,179	1,780	259	137	40	1,007	508	58	254	285		5,777	2,433	436	122		.350	.478	.893
3	Beaneaters	.401	1894	133	.629	83	49	5,011	1,220	1,658	272	94	103	1,043	535	47	261	241		5,657	2,427	469	64		.331	.484	.885
4	Phillies	.394	1895	133	.595	78	53	5,037	1,068	1,664	272	73	61	930	463	69	262	276		5,689	2,265	406	120		.330	.450	.844
5	Orioles	.394	1897	136	.692	90	40	4,872	964	1,584	243	66	19	821	437	115	255	401		5,496	2,016	328	72		.325	.414	.808
6	Orioles	.393	1896	132	.698	90	39	4,719	995	1,548	207	100	23	854	386	120	201	441		5,323	2,024	330	98		.328	.429	.822
7	Red Sox	.385	1950	154	.610	94	60	5,516	1,027	1,665	287	61	161	974	719	25	580	32	17	6,322	2,557	509	62	153	.302	.464	.848
8	Tigers	.385	1921	154	.464	71	82	5,456	887	1,723	270	99	58	793	581	29	373	95	89	6,293	2,365	427	227		.316	.433	.818
9	Yankees	.384	1930	154	.558	86	68	5,447	1,062	1,683	298	110	152	985	644	19	569	91	60	6,272	2,657	560	162		.309	.488	.872
10	Orioles	.384	1895	132	.669	87	43	4,725	1,009	1,530	235	89	25	828	355	106	243	310		5,311	2,018	349	125		.324	.427	.811
11	Yankees	.384	1927	155	.714	110	44	5,354	976	1,644	291	103	158	907	642	22	610	90	64	6,222	2,615	552	204		.307	.488	.872
12	Indians	.383	1921	154	.610	94	60	5,376	925	1,657	355	91	42	847	619	37	373	51	42	6,264	2,320	488	232		.308	.432	.815
13	Yankees	.383	1931	155	.614	94	59	5,608	1,067	1,667	276	78	155	990	750	28	554	139	68	6,473	2,564	509	87		.297	.457	.840
14	Orioles	.382	1898	154	.644	96	53	5,242	933	1,584	154	77	12	757	519	160	316	250		6,000	1,928	243	79		.302	.368	.750
15	Red Sox	.381	1949	155	.623	96	58	5,320	896	1,500	272	36	131	835	835	17	510	43	25	6,250	2,237	439	78	169	.282	.420	.802
16	Yankees	.381	1936	155	.667	102	51	5,591	1,065	1,676	315	83	182	997	700	33	593	77	40	6,391	2,703	580	67		.300	.483	.864
17	Indians	.381	1923	153	.536	82	71	5,277	886	1,591	301	75	59	806	626	49	381	79	79	6,150	2,219	435	198		.301	.421	.801
18	Colts	.380	1894	137	.432	57	75	5,022	1,056	1,574	268	87	65	907	507	36	306	332		5,641	2,211	420	76		.313	.440	.821
19	Senators	.380	1894	132	.341	45	87	4,581	882	1,317	218	118	59	762	617	69	375	249		5,323	1,948	395	56		.287	.425	.806
20	Tigers	.380	1925	156	.526	81	73	5,371	903	1,623	277	84	50	798	639	32	384	97	63	6,262	2,218	411	220		.302	.413	.793
21	Pirates	.379	1894	133	.500	65	65	4,700	965	1,465	223	125	48	812	444	68	210	257		5,375	2,082	396	163		.312	.443	.822
22	Red Sox	.378	1938	150	.591	88	61	5,229	902	1,566	298	56	98	860	649	13	462	55	51	6,003	2,270	452	112		.299	.434	.812
23	Cubs	.378	1930	156	.584	90	64	5,581	998	1,722	305	72	171	940	588	37	635	70		6,354	2,684	548	148		.309	.481	.859
24	Beaneaters	.378	1897	135	.705	93	39	4,937	1,025	1,574	230	83	45	885	423	47	263	233		5,521	2,105	358	114		.319	.426	.804
25	Tigers	.377	1936	154	.539	83	71	5,464	921	1,638	326	55	94	847	646	34	462	73	49	6,232	2,356	475	88		.300	.431	.808