Ted Williams had the best on-base percentage in 1957, with an on-base percentage of .526.

Interpreted as:

best obp with a minimum of 3.1 PA per team game by an MLB player 1957

	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	Ted Williams T. Williams	.526	1957	BOS	132	420	96	163	28	1	38	87	119	5	43	0	1	546	307	67	0	2	33	11	.388	.731	1.257	148	87.3	.524	223	79
2	Mickey Mantle M. Mantle	.512	1957	NYY	144	474	121	173	28	6	34	94	146	0	75	16	3	623	315	68	0	3	23	5	.365	.665	1.177	157	87.1	.498	217	86
3	Stan Musial S. Musial	.422	1957	STL	134	502	82	176	38	3	29	102	66	2	34	1	1	579	307	70	1	8	19	13	.351	.612	1.034	119	54.2	.439	167	47.3
4	Gene Woodling G. Woodling	.408	1957	CLE	133	430	74	138	25	2	19	78	64	3	35	0	5	506	224	46	4	5	2	6	.321	.521	.929	92	35.6	.409	155	32.9
5	Minnie Minoso M. Minoso	.408	1957	CWS	153	568	96	176	36	5	12	103	79	21	54	18	15	678	258	53	1	9	5	19	.310	.454	.862	110	34.7	.384	140	31.9
6	Willie Mays W. Mays	.407	1957	NYG	152	585	112	195	26	20	35	97	76	1	62	38	19	668	366	81	0	6	15	14	.333	.626	1.033	137	62.6	.439	169	56.2
7	Nellie Fox N. Fox	.403	1957	CWS	155	619	110	196	27	8	6	61	75	16	13	5	6	718	257	41	5	3	2	7	.317	.415	.818	109	29	.371	131	26
8	Ed Bouchee E. Bouchee	.394	1957	PHI	154	574	78	168	35	8	17	76	84	14	91	1	0	675	270	60	0	3	6	15	.293	.470	.864	109	34.2	.384	135	28.4
9	Richie Ashburn R. Ashburn	.390	1957	PHI	156	626	93	186	26	8	0	33	94	4	44	13	10	729	228	34	1	4	1	10	.297	.364	.754	97	15.9	.347	111	9.6
10	Roy Sievers R. Sievers	.388	1957	WSH	152	572	99	172	23	5	42	114	76	7	55	1	1	657	331	70	0	2	11	9	.301	.579	.967	124	50.5	.417	160	46.3
11	Bob Boyd B. Boyd	.388	1957	BAL	141	485	73	154	16	8	4	34	55	2	31	2	4	552	198	28	8	2	3	4	.318	.408	.796	79	17	.358	126	17.2
12	Johnny Temple J. Temple	.387	1957	CIN	145	557	85	158	24	4	0	37	94	4	34	19	5	677	190	28	16	6	0	4	.284	.341	.728	86	10.4	.338	100	0.1
13	Eddie Mathews E. Mathews	.387	1957	MIL	148	572	109	167	28	9	32	94	90	0	79	3	1	666	309	69	2	2	5	6	.292	.540	.927	119	44.6	.405	155	44.1
14	Don Hoak D. Hoak	.381	1957	CIN	149	529	78	155	39	2	19	89	74	4	54	8	15	616	255	60	5	4	5	13	.293	.482	.863	99	29.9	.381	127	20.5
15	Hank Aaron H. Aaron	.378	1957	MIL	151	615	118	198	27	6	44	132	57	0	58	1	1	675	369	77	0	3	15	13	.322	.600	.978	128	52.6	.419	164	52.1
16	Charlie Maxwell C. Maxwell	.377	1957	DET	138	492	75	136	23	3	24	82	76	5	84	3	2	580	237	50	4	3	7	6	.276	.482	.858	91	26.8	.378	132	21.9
17	Frank Robinson F. Robinson	.376	1957	CIN	150	611	97	197	29	5	29	75	44	12	92	10	2	677	323	63	5	5	5	13	.322	.529	.905	116	40.7	.396	137	30.4
18	Vic Wertz V. Wertz	.371	1957	CLE	144	515	84	145	21	0	28	105	78	2	88	2	3	606	250	49	0	11	6	9	.282	.485	.857	94	26.6	.375	133	23.4
19	Roy McMillan R. McMillan	.371	1957	CIN	151	448	50	122	25	5	1	55	66	6	44	5	1	534	160	31	11	3	8	11	.272	.357	.728	64	4.6	.330	94	-3.6
20	Eddie Yost E. Yost	.370	1957	WSH	110	414	47	104	13	5	9	38	73	5	49	1	11	492	154	27	0	0	2	6	.251	.372	.742	63	8.5	.341	109	5.4
21	Duke Snider D. Snider	.368	1957	BKN	139	508	91	139	25	7	40	92	77	1	104	3	4	592	298	72	3	3	12	17	.274	.587	.955	107	41	.408	146	32.7
22	Jackie Jensen J. Jensen	.367	1957	BOS	145	544	82	153	29	2	23	103	75	2	66	8	5	627	255	54	1	5	3	22	.281	.469	.836	95	25.2	.370	121	15.7
23	Wally Moon W. Moon	.367	1957	STL	142	516	86	152	28	5	24	73	62	1	57	5	6	586	262	57	0	7	12	14	.295	.508	.875	92	26.8	.377	128	19.8
24	Gil Hodges G. Hodges	.366	1957	BKN	150	579	94	173	28	7	27	98	63	2	91	5	3	654	296	62	4	6	6	11	.299	.511	.877	105	32.5	.383	129	23.3
25	Bob Nieman B. Nieman	.363	1957	BAL	129	445	61	123	17	6	13	70	63	2	86	4	4	521	191	36	3	8	3	14	.276	.429	.792	72	13.6	.352	122	13.8