The New York Yankees had the highest on-base percentage by a team in 2009, with an on-base percentage of .362.

	TEAM	OBP	SEASON	G	W%	W	L	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	SLG	OPS
1	Yankees	.362	2009	162	.636	103	59	5,660	915	1,604	325	21	244	881	663	54	1,014	111	28	6,447	2,703	590	31	39	35	144	.283	.478	.839
2	Red Sox	.352	2009	162	.586	95	67	5,543	872	1,495	335	25	212	822	659	70	1,120	126	39	6,342	2,516	572	19	51	39	137	.270	.454	.806
3	Angels	.350	2009	162	.599	97	65	5,622	883	1,604	293	33	173	841	547	41	1,054	148	63	6,305	2,482	499	43	52	32	128	.285	.441	.792
4	Dodgers	.346	2009	162	.586	95	67	5,592	780	1,511	278	39	145	739	607	63	1,068	116	48	6,384	2,302	462	78	44	76	141	.270	.412	.758
5	Twins	.345	2009	163	.534	87	76	5,608	817	1,539	271	40	172	770	585	45	1,021	85	32	6,346	2,406	483	51	57	46	147	.274	.429	.774
6	Rockies	.343	2009	162	.568	92	70	5,398	804	1,408	300	50	190	760	660	47	1,277	106	55	6,241	2,378	540	76	60	40	111	.261	.441	.784
7	Rays	.343	2009	162	.519	84	78	5,462	803	1,434	297	36	199	765	642	49	1,229	194	61	6,223	2,400	532	25	45	36	104	.263	.439	.782
8	Brewers	.341	2009	162	.494	80	82	5,510	785	1,447	281	37	182	757	610	71	1,231	68	37	6,296	2,348	500	58	47	44	128	.263	.426	.767
9	Marlins	.340	2009	162	.537	87	75	5,572	772	1,493	296	25	159	727	568	63	1,226	75	35	6,312	2,316	480	70	39	46	110	.268	.416	.756
10	Indians	.339	2009	162	.401	65	97	5,568	773	1,468	314	28	161	730	582	81	1,211	84	31	6,320	2,321	503	39	50	20	140	.264	.417	.756
11	Braves	.339	2009	162	.531	86	76	5,539	735	1,459	300	20	149	700	602	52	1,064	58	26	6,335	2,246	469	95	47	54	142	.263	.405	.744
12	Nationals	.337	2009	162	.364	59	103	5,493	710	1,416	271	38	156	685	617	56	1,208	73	40	6,272	2,231	465	64	42	39	133	.258	.406	.743
13	Mets	.335	2009	162	.432	70	92	5,453	671	1,472	295	49	95	631	526	36	928	122	44	6,158	2,150	439	88	55	49	144	.270	.394	.729
14	Phillies	.334	2009	162	.574	93	69	5,578	820	1,439	312	35	224	788	589	71	1,155	119	28	6,338	2,493	571	55	45	47	90	.258	.447	.781
15	Blue Jays	.333	2009	162	.463	75	87	5,696	798	1,516	339	13	209	766	548	45	1,028	73	23	6,362	2,508	561	24	49	23	130	.266	.440	.773
16	Cardinals	.332	2009	162	.562	91	71	5,465	730	1,436	294	29	160	694	528	61	1,041	75	31	6,165	2,268	483	68	43	73	127	.263	.415	.747
17	Orioles	.332	2009	162	.395	64	98	5,618	741	1,508	307	19	160	708	517	39	1,013	76	37	6,233	2,333	486	13	46	25	131	.268	.415	.747
18	Cubs	.332	2009	161	.516	83	78	5,486	707	1,398	293	29	161	678	592	59	1,185	56	34	6,244	2,232	483	65	42	44	134	.255	.407	.738
19	Tigers	.331	2009	163	.528	86	77	5,540	743	1,443	245	35	183	718	540	61	1,114	72	33	6,233	2,307	463	53	39	30	131	.260	.416	.747
20	White Sox	.329	2009	162	.488	79	83	5,463	724	1,410	246	20	184	695	534	62	1,022	113	49	6,132	2,248	450	34	39	25	139	.258	.411	.740
21	Athletics	.328	2009	162	.463	75	87	5,584	759	1,464	307	21	135	723	527	50	1,046	133	48	6,246	2,218	463	31	54	16	130	.262	.397	.726
22	Diamondbacks	.324	2009	162	.432	70	92	5,565	720	1,408	307	45	173	686	571	37	1,298	102	40	6,268	2,324	525	54	41	47	93	.253	.418	.742
23	Padres	.321	2009	162	.463	75	87	5,425	638	1,315	265	31	141	605	586	57	1,182	82	29	6,178	2,065	437	74	36	52	131	.242	.381	.701
24	Rangers	.320	2009	162	.537	87	75	5,526	784	1,436	296	27	224	748	472	37	1,253	149	36	6,126	2,458	547	40	51	23	97	.260	.445	.764
25	Astros	.319	2009	162	.457	74	88	5,436	643	1,415	270	32	142	616	448	43	990	113	44	6,038	2,175	444	66	45	37	153	.260	.400	.719