highest obp by a player in a season with at least 500 pa since 1900

Since 1900, Barry Bonds has the best on-base percentage with 500+ plate appearances in a season, with an on-base percentage of .609 in 2004.

	NAME	OBP	PA	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	TB	XBH	SH	SF	IBB	GIDP	AVG	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Barry Bonds B. Bonds	.609	617	2004	SFG	147	373	129	135	27	3	45	101	232	9	41	6	1	303	75	0	3	120	5	.362	.812	1.422	185	108	.537	233	105.7
2	Barry Bonds B. Bonds	.582	612	2002	SFG	143	403	117	149	31	2	46	110	198	9	47	9	2	322	79	0	2	68	4	.370	.799	1.381	183	110	.544	244	109.9
3	Ted Williams T. Williams	.553	606	1941	BSA	143	456	135	185	33	3	37	120	147	3	27	2	4	335	73	0			10	.406	.735	1.287	179	108.8	.568	221	96.9
4	Babe Ruth B. Ruth	.545	699	1923	NYY	152	522	151	205	45	13	41	130	170	4	93	17	21	399	99	3				.393	.764	1.309	211	124.7	.571	230	120.4
5	Babe Ruth B. Ruth	.532	616	1920	NYY	142	458	158	172	36	9	54	135	150	3	80	14	14	388	99	5				.376	.847	1.379	191	120.9	.597	237	110.5
6	Barry Bonds B. Bonds	.529	550	2003	SFG	130	390	111	133	22	1	45	90	148	10	58	7	0	292	68	0	2	61	7	.341	.749	1.278	148	80.5	.503	212	79.4
7	Ted Williams T. Williams	.526	546	1957	BOS	132	420	96	163	28	1	38	87	119	5	43	0	1	307	67	0	2	33	11	.388	.731	1.257	148	87.3	.524	223	79
8	Babe Ruth B. Ruth	.516	652	1926	NYY	152	495	139	184	30	5	47	153	144	3	76	11	9	365	82	10				.372	.737	1.253	184	105.6	.551	216	100.6
9	Barry Bonds B. Bonds	.515	664	2001	SFG	153	476	129	156	32	2	73	137	177	9	93	13	3	411	107	0	2	35	5	.328	.863	1.379	200	117.7	.537	234	116.6
10	Ted Williams T. Williams	.513	526	1954	BOS	117	386	93	133	23	1	29	89	136	1	32	0	0	245	53	0	3		10	.345	.635	1.148	131	71.1	.507	207	65.5
11	Babe Ruth B. Ruth	.513	681	1924	NYY	153	529	143	200	39	7	46	124	142	4	81	9	13	391	92	6				.378	.739	1.252	193	109.2	.549	210	102
12	Babe Ruth B. Ruth	.512	693	1921	NYY	152	540	177	204	44	16	59	168	145	4	81	17	13	457	119	4				.378	.846	1.359	214	127.8	.575	224	118.7
13	Mickey Mantle M. Mantle	.512	623	1957	NYY	144	474	121	173	28	6	34	94	146	0	75	16	3	315	68	0	3	23	5	.365	.665	1.177	157	87.1	.498	217	86
14	Rogers Hornsby R. Hornsby	.507	640	1924	SLN	143	536	121	227	43	14	25	94	89	2	32	5	12	373	82	13				.424	.696	1.203	175	96.7	.537	221	95.9
15	Ted Williams T. Williams	.499	671	1942	BSA	150	522	141	186	34	5	36	137	145	4	51	3	2	338	75	0			12	.356	.648	1.147	168	96.2	.524	209	86.5
16	Ted Williams T. Williams	.499	693	1947	BSA	156	528	125	181	40	9	32	114	162	2	47	0	1	335	81	1			10	.343	.634	1.133	170	91.3	.508	207	86.2
17	Rogers Hornsby R. Hornsby	.498	619	1928	BSN	140	486	99	188	42	7	21	94	107	1	41	5		307	70	25				.387	.632	1.130	156	80.2	.506	196	78.1
18	Ted Williams T. Williams	.497	672	1946	BSA	150	514	142	176	37	8	38	123	156	2	44	0	0	343	83	0			12	.342	.667	1.164	166	95.8	.525	214	87.5
19	Ted Williams T. Williams	.497	638	1948	BSA	137	509	124	188	44	3	25	127	126	3	41	4	0	313	72	0			10	.369	.615	1.112	156	81	.504	184	68.8
20	Babe Ruth B. Ruth	.495	663	1931	NYY	145	534	149	199	31	3	46	162	128	1	51	5	4	374	80	0				.373	.700	1.195	181	98.6	.525	206	95.1
21	Babe Ruth B. Ruth	.493	676	1930	NYY	145	518	150	186	28	9	49	153	136	1	61	10	10	379	86	21				.359	.732	1.225	192	97	.517	204	100.6
22	Arky Vaughan A. Vaughan	.491	610	1935	PIT	137	499	108	192	34	10	19	99	97	7	18	4		303	63	7			5	.385	.607	1.098	151	75	.493	194	72.7
23	Ted Williams T. Williams	.490	730	1949	BSA	155	566	150	194	39	3	43	159	162	2	48	1	1	368	85	0			22	.343	.650	1.141	182	95.5	.511	187	82.2
24	Babe Ruth B. Ruth	.489	589	1932	NYY	133	457	120	156	13	5	41	137	130	2	62	2	2	302	59	0				.341	.661	1.150	153	79.1	.501	192	75.3
25	Rogers Hornsby R. Hornsby	.489	605	1925	SLN	138	504	133	203	41	10	39	143	83	2	39	5	3	381	90	16				.403	.756	1.245	173	94.1	.540	208	90.1