Barry Bonds had the best on-base percentage in 2004, with an on-base percentage of .609.

Interpreted as:

highest obp with a minimum of 3.1 PA per team game by a player in 2004

	NAME	OBP	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Barry Bonds B. Bonds	.609	2004	SFG	147	373	129	135	27	3	45	101	232	9	41	6	1	617	303	75	0	3	120	5	.362	.812	1.422	185	108	.537	233	105.7
2	Todd Helton T. Helton	.469	2004	COL	154	547	115	190	49	2	32	96	127	3	72	3	0	683	339	83	0	6	19	12	.347	.620	1.088	156	71.6	.454	166	58.1
3	Lance Berkman L. Berkman	.450	2004	HOU	160	544	104	172	40	3	30	106	127	10	101	9	7	687	308	73	0	6	14	10	.316	.566	1.016	143	58.1	.430	161	53.9
4	J.D. Drew	.436	2004	ATL	145	518	118	158	28	8	31	93	118	5	116	12	3	645	295	67	1	3	2	7	.305	.569	1.006	134	54.1	.429	162	51.7
5	Bobby Abreu B. Abreu	.428	2004	PHI	159	574	118	173	47	1	30	105	127	5	116	40	5	713	312	78	0	7	10	5	.301	.544	.971	139	50.2	.413	149	44.9
6	Melvin Mora M. Mora	.419	2004	BAL	140	550	111	187	41	0	27	104	66	11	95	11	6	636	309	68	6	3	0	10	.340	.562	.981	128	49	.421	159	48.2
7	Jim Edmonds J. Edmonds	.418	2004	STL	153	498	102	150	38	3	42	111	101	5	150	8	3	612	320	83	0	8	12	4	.301	.643	1.061	131	54.8	.436	168	53.3
8	Albert Pujols A. Pujols	.415	2004	STL	154	592	133	196	51	2	46	123	84	7	52	5	5	692	389	99	0	9	12	21	.331	.657	1.072	151	65.3	.442	171	63.6
9	Ichiro Suzuki I. Suzuki	.414	2004	SEA	161	704	101	262	24	5	8	60	49	4	63	36	11	762	320	37	2	3	19	6	.372	.455	.869	124	29.1	.375	131	30
10	Travis Hafner T. Hafner	.410	2004	CLE	140	482	96	150	41	3	28	109	68	17	111	3	2	573	281	72	0	6	7	11	.311	.583	.993	113	42.4	.418	158	42.4
11	Scott Rolen S. Rolen	.409	2004	STL	142	500	109	157	32	4	34	124	72	13	92	4	3	593	299	70	1	7	5	8	.314	.598	1.007	120	46.3	.422	159	44.8
12	Jorge Posada J. Posada	.400	2004	NYY	137	449	72	122	31	0	21	81	88	9	92	1	3	547	216	52	0	1	5	24	.272	.481	.881	93	24.7	.384	134	24
13	Jason Kendall J. Kendall	.399	2004	PIT	147	574	86	183	32	0	3	51	60	19	41	11	8	658	224	35	1	4	2	12	.319	.390	.789	95	13.9	.355	113	10.6
14	Eric Chavez E. Chavez	.397	2004	OAK	125	475	87	131	20	0	29	77	95	3	99	6	3	577	238	49	0	4	10	21	.276	.501	.898	98	26.3	.384	134	24.9
15	Manny Ramirez M. Ramirez	.397	2004	BOS	152	568	108	175	44	0	43	130	82	6	124	2	4	663	348	87	0	7	15	17	.308	.613	1.009	131	48.7	.417	153	44.6
16	Jim Thome J. Thome	.396	2004	PHI	143	508	97	139	28	1	42	105	104	2	144	0	2	618	295	71	0	4	26	10	.274	.581	.977	113	36.6	.400	140	32
17	Erubiel Durazo E. Durazo	.396	2004	OAK	142	511	80	164	35	1	22	88	56	9	104	3	2	578	267	58	0	2	9	7	.321	.523	.919	102	30.2	.392	139	28.8
18	Gary Sheffield G. Sheffield	.393	2004	NYY	154	573	117	166	30	1	36	121	92	11	83	5	6	684	306	67	0	8	7	16	.290	.534	.927	122	36.9	.394	141	36
19	Mark Loretta M. Loretta	.391	2004	SDP	154	620	108	208	47	2	16	76	58	9	45	5	3	707	307	65	4	16	3	10	.335	.495	.886	118	30	.380	137	33.5
20	Vladimir Guerrero V. Guerrero	.391	2004	ANA	156	612	124	206	39	2	39	126	52	8	74	15	3	680	366	80	0	8	14	19	.337	.598	.989	131	46.7	.411	154	46.7
21	Jason Varitek J. Varitek	.390	2004	BOS	137	463	67	137	30	1	18	73	62	10	126	10	3	536	223	49	0	1	9	11	.296	.482	.872	87	20.5	.375	125	17.2
22	Hideki Matsui H. Matsui	.390	2004	NYY	162	584	109	174	34	2	31	108	88	3	103	3	0	680	305	67	0	5	2	11	.298	.522	.912	119	35.1	.391	139	34.3
23	Adrian Beltre A. Beltre	.388	2004	LAD	156	598	104	200	32	0	48	121	53	2	87	7	2	657	376	80	0	4	9	15	.334	.629	1.017	133	51.9	.423	161	52
24	Adam Dunn A. Dunn	.388	2004	CIN	161	568	105	151	34	0	46	102	108	5	195	6	1	681	323	80	0	0	11	8	.266	.569	.956	126	41.2	.402	142	37
25	Lyle Overbay L. Overbay	.385	2004	MIL	159	579	83	174	53	1	16	87	81	2	128	2	1	668	277	70	0	6	9	11	.301	.478	.863	106	22.9	.371	123	19.6