Between the 1970 and 1979 seasons, Dick Dietz had the best on-base percentage, with an on-base percentage of .412.

Interpreted as:

highest obp with a minimum of 1.55 PA per team game by a player in the 1970s

	NAME	OBP	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	Dick Dietz D. Dietz	.412	400	1,141	166	312	64	3	45	209	269	7	228	3	4	1,431	517	112	5	9	24	31	.273	.453	.865	236	81.4	.390	140	68.7
2	Rod Carew R. Carew	.408	1,358	5,211	837	1,787	241	80	60	628	586	14	528	253	110	5,916	2,368	381	61	44	101	123	.343	.454	.862	950	308.5	.386	142	279.6
3	Joe Morgan J. Morgan	.404	1,458	5,139	1,005	1,451	275	47	173	720	1,071	24	517	488	105	6,320	2,339	495	25	61	44	63	.282	.455	.860	1030	343.5	.390	143	312.2
4	Mike Hargrove M. Hargrove	.400	878	2,957	455	864	148	18	57	359	523	32	333	12	21	3,568	1,219	223	22	34	47	65	.292	.412	.812	532	137	.370	133	132.1
5	Ken Singleton K. Singleton	.398	1,405	4,812	701	1,392	218	15	171	715	888	13	857	21	31	5,778	2,153	404	23	42	92	142	.289	.447	.846	909	279.3	.381	140	267.3
6	Willie Mays W. Mays	.391	429	1,348	235	357	60	8	60	191	278	8	308	33	8	1,651	613	128	6	11	20	31	.265	.455	.846	259	83	.381	137	70
7	Ron Hunt R. Hunt	.390	638	2,157	343	596	86	4	11	141	263	142	137	27	23	2,610	723	101	43	5	9	30	.276	.335	.725	336	59.5	.344	111	32.5
8	Pete Rose P. Rose	.389	1,604	6,523	1,068	2,045	394	64	79	580	783	50	464	105	60	7,399	2,804	537	9	34	87	111	.314	.430	.819	1100	295.5	.370	131	260.7
9	Bernie Carbo B. Carbo	.388	985	2,713	372	718	140	9	96	357	536	19	608	26	18	3,297	1,164	245	12	17	50	58	.265	.429	.817	491	135.3	.370	129	111
10	Gene Tenace G. Tenace	.386	1,229	3,721	555	911	147	19	171	576	805	74	846	31	36	4,652	1,609	337	20	32	44	64	.245	.432	.819	706	196.1	.374	141	213.3
11	Don Buford D. Buford	.385	391	1,361	244	351	40	8	41	142	267	19	200	39	18	1,663	530	89	8	8	33	8	.258	.389	.774	227	52.1	.353	123	45.3
12	Carl Yastrzemski C. Yastrzemski	.384	1,479	5,272	845	1,492	247	19	202	846	888	18	540	88	57	6,251	2,383	468	3	70	96	127	.283	.452	.836	951	270	.374	129	201.6
13	Fred Lynn F. Lynn	.383	718	2,647	456	819	185	26	112	460	324	13	355	31	25	3,035	1,392	323	15	36	31	52	.309	.526	.909	523	185.9	.400	144	150.9
14	Merv Rettenmund M. Rettenmund	.382	895	2,297	356	626	99	13	60	297	398	17	333	61	26	2,758	931	172	31	15	14	59	.273	.405	.787	392	96	.362	128	88.7
15	Bill Madlock B. Madlock	.381	837	3,098	457	991	171	25	73	382	290	30	222	99	53	3,464	1,431	269	20	26	64	95	.320	.462	.843	527	143.1	.375	130	116.7
16	Roberto Clemente R. Clemente	.378	342	1,312	215	441	70	25	37	206	93	2	180	4	2	1,421	672	132	2	12	26	41	.336	.512	.890	234	85.2	.392	146	75.4
17	Jim Hickman J. Hickman	.378	523	1,526	249	425	62	10	73	263	245	6	276	4	4	1,799	726	145	9	13	20	40	.279	.476	.853	284	92.9	.382	127	58.5
18	Ken Griffey K. Griffey	.377	800	2,917	518	903	152	44	45	305	321	4	378	115	42	3,273	1,278	241	17	14	10	40	.310	.438	.815	485	122.8	.369	128	107.6
19	Keith Hernandez K. Hernandez	.377	688	2,308	373	676	151	28	47	328	314	7	321	35	21	2,652	1,024	226	6	17	34	52	.293	.444	.820	391	94.2	.366	127	82.7
20	Dick Allen D. Allen	.377	883	3,111	508	882	153	19	174	575	472	9	705	69	25	3,624	1,595	346	4	28	63	106	.284	.513	.889	600	213	.395	149	192.1
21	Greg Gross G. Gross	.376	780	2,297	300	685	77	36	6	191	302	1	162	26	33	2,654	852	119	29	25	21	49	.298	.371	.747	340	49.5	.344	112	37.9
22	Ron Fairly R. Fairly	.376	1,066	3,051	405	830	126	7	113	464	502	22	370	18	18	3,625	1,309	246	27	23	71	74	.272	.429	.805	518	126.1	.362	123	94.9
23	Lou Whitaker L. Whitaker	.376	277	939	151	267	27	15	6	102	143	2	137	29	19	1,124	342	48	28	12	2	19	.284	.364	.740	144	17.8	.341	107	9.2
24	Frank Robinson F. Robinson	.375	744	2,464	401	660	107	7	136	435	403	38	423	13	7	2,940	1,189	250	4	31	49	73	.268	.483	.858	463	148.2	.382	144	144.6
25	Joe Torre J. Torre	.374	1,013	3,572	454	1,081	161	32	92	532	379	44	491	13	8	4,024	1,582	285	7	22	71	136	.303	.443	.817	585	155	.367	127	125.5