who has the highest obp in a month of all-time minimum 70 at bats

Barry Bonds has the highest on-base percentage with 70+ at-bats in a month, with an on-base percentage of .621 in August 2002.

	NAME	OBP	AB	MONTH	G	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	SLG	OPS
1	Barry Bonds B. Bonds	.621	76	August 2002	27	24	34	6	0	11	25	37	1	7	1	1	116	73	17	0	2	11	1	.447	.961	1.581
2	Barry Bonds B. Bonds	.615	70	August 2004	27	27	29	6	1	11	27	38	0	7	2	1	109	70	18	0	1	15	0	.414	1.000	1.615
3	Babe Ruth B. Ruth	.611	100	July 1920	34	45	44	10	2	13	33	43	1	19	5		147	97	25	3				.440	.970	1.581
4	Barry Bonds B. Bonds	.604	70	June 2002	26	19	26	4	1	7	17	40	1	8	1	0	111	53	12	0	0	17	1	.371	.757	1.361
5	Jason Giambi J. Giambi	.604	80	June 2000	25	24	36	11	0	5	23	30	1	14	1	0	111	62	16	0	0	2	2	.450	.775	1.379
6	Joe Jackson J. Jackson	.598	83	September 1912	25	24	42	6	4	0	23	14	5	2	3		106	56	10	4				.506	.675	1.273
7	Ted Williams T. Williams	.595	87	June 1948	24	24	40	12	0	5	28	29	0	3	0		116	67	17	0			2	.460	.770	1.365
8	Frank Thomas F. Thomas	.593	84	May 1994	25	39	38	9	0	12	28	31	1	11	0	0	118	83	21	0	2	3	3	.452	.988	1.581
9	Ted Williams T. Williams	.592	107	August 1941	35	31	43	4	2	10	26	50	0	8	0		157	81	16	0			2	.402	.757	1.349
10	Todd Helton T. Helton	.588	82	May 2000	23	32	42	7	0	11	26	18	0	9	0	0	102	82	18	0	2	5	2	.512	1.000	1.588
11	Harry Heilmann H. Heilmann	.586	97	August 1927	28	28	49	9	3	5	22	19	0	1	1		119	79	17	3				.505	.814	1.401
12	Babe Ruth B. Ruth	.586	86	August 1923	25	25	38	9	1	8	30	28	2	12	2		117	73	18	1				.442	.849	1.435
13	Charlie Gehringer C. Gehringer	.586	122	August 1937	32	38	59	11	0	7	38	30	0	2	6		152	91	18	0				.484	.746	1.331
14	Rogers Hornsby R. Hornsby	.584	100	June 1925	28	31	48	9	2	9	31	25	0	6	2		126	88	20	1				.480	.880	1.464
15	Lou Gehrig L. Gehrig	.582	111	June 1930	28	37	55	11	3	10	41	20	3	10	5		137	102	24	3				.495	.919	1.501
16	Wade Boggs W. Boggs	.581	101	June 1987	26	26	49	8	4	4	19	22	1	5	0	0	125	77	16	1	0	8	4	.485	.762	1.343
17	Babe Ruth B. Ruth	.580	92	August 1932	29	30	37	4	1	9	26	37	2	13	0		131	70	14	0				.402	.761	1.341
18	Babe Ruth B. Ruth	.580	100	June 1920	29	38	45	7	4	12	37	30	1	17	6		131	96	23	0				.450	.960	1.540
19	Ted Williams T. Williams	.579	84	July 1957	28	21	37	9	1	9	21	28	1	9	0	0	114	75	19	0	1	13	2	.440	.893	1.472
20	Joe Jackson J. Jackson	.579	97	May 1913	27	24	49	10	7	1	23	16	1	5	4		114	76	18	0				.505	.784	1.362
21	Babe Ruth B. Ruth	.578	98	August 1921	28	38	44	13	2	10	34	30	0	13	2		129	91	25	1				.449	.929	1.507
22	George Sisler G. Sisler	.578	114	June 1920	29	33	60	9	3	4	26	13	1	2	9		131	87	16	3				.526	.763	1.341
23	Tristram Speaker T. Speaker	.576	71	May 1925	19	15	35	8	1	4	17	13	1	2	1		87	57	13	2				.493	.803	1.379
24	Babe Ruth B. Ruth	.571	111	July 1923	31	36	51	9	3	10	27	29	0	18	1		140	96	22	0				.459	.865	1.436
25	Joe Jackson J. Jackson	.571	86	June 1916	24	18	44	10	3	1		10	2	5	4		100	63	14	2				.512	.733	1.304