Ted Williams had the best on-base percentage by a player in his first 3 seasons, with an on-base percentage of .475.

Interpreted as:

highest obp with a minimum of 1.55 PA per team game by a player in first 3 seasons

	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	Ted Williams T. Williams	.475	436	1,582	400	563	120	28	91	378	350	8	145	8		1,944	1,012	239	4			33	.356	.640	1.114	475	241.3	.496	177	203.1
2	Roy Thomas R. Thomas	.449	419	1,557	371	494	21	9	1	108	330	41	153	106		1,980	536	31	52				.317	.344	.793	369	101	.401	134	94.3
3	Frank Thomas F. Thomas	.447	378	1,323	251	426	88	7	63	255	304	8	254	7	6	1,651	717	158	0	16	19	44	.322	.542	.989	333	150.3	.437	177	147.3
4	Benny Kauff B. Kauff	.446	295	1,065	216	379	67	24	20	180	160	14	105	131		1,262	554	111	23				.356	.520	.967	252	120.8	.460	170	101.5
5	Tuck Turner T. Turner	.437	177	712	178	276	33	18	4	140	58	4	43	32		786	357	55	12				.388	.501	.938	188	52.5	.438	133	47.5
6	Paul Waner P. Waner	.433	451	1,761	357	640	127	59	23	296	203	12	49	22		2,024	954	209	48				.363	.542	.974	407	160.2	.444	154	140
7	Al Wingo A. Wingo	.428	223	649	134	224	47	15	6	96	94	0	56	16		761	319	68	18				.345	.492	.920	143	46.9	.424	136	38.4
8	Elmer Flick E. Flick	.427	399	1,483	288	503	70	40	21	289	184	42	97	89		1,734	716	131	25				.339	.483	.909	362	128.3	.433	149	120.4
9	Ray Grimes R. Grimes	.424	286	1,043	191	351	83	18	20	178	146	12	88	12		1,223	530	121	22				.337	.508	.932	231	77.9	.427	143	70
10	Charlie Keller C. Keller	.423	389	1,405	291	427	63	31	65	298	289	1	179	20		1,709	747	159	14			18	.304	.532	.955	335	130.2	.434	149	112.3
11	Wade Boggs W. Boggs	.421	415	1,545	260	531	89	12	16	173	216	1	101	7	5	1,792	692	117	15	15	12	37	.344	.448	.869	301	99.8	.390	138	81
12	Johnny Mize J. Mize	.418	420	1,505	264	519	104	31	71	308	180	10	136	3		1,699	898	206	4				.345	.597	1.015	364	148.3	.452	170	148.2
13	Chuck Klein C. Klein	.418	369	1,517	325	560	118	18	94	349	122	5	133	9		1,673	996	230	29				.369	.657	1.074	388	163.7	.466	148	120
14	Bill Joyce B. Joyce	.417	295	1,104	286	289	42	45	10	174	268	25	82	102		1,397	451	97					.262	.409	.825	289	86.2	.407	131	65.6
15	Willie Keeler W. Keeler	.416	170	747	191	269	33	24	7	116	52	20	14	42		835	371	64	16				.360	.497	.913	187	41.3	.422	122	33.3
16	Juan Soto J. Soto	.415	313	1,110	226	328	71	6	69	217	228	4	259	23	5	1,349	618	146	1	6	25	21	.295	.557	.972	265	99.4	.405	152	90.1
17	Stan Musial S. Musial	.415	309	1,131	203	387	84	30	24	160	136	4	44	16		1,286	603	138	15			20	.342	.533	.948	242	108	.442	170	98.8
18	Max Bishop M. Bishop	.414	318	1,062	195	284	51	8	6	81	257	8	108	13		1,353	369	65	26				.267	.347	.761	196	27.8	.374	104	8.1
19	Ferris Fain F. Fain	.413	431	1,506	232	418	76	17	17	237	344	5	122	22		1,883	579	110	28			47	.278	.384	.798	285	64.5	.385	121	49.2
20	Rasty Wright R. Wright	.413	101	393	89	111	11	6	0	29	81	6	4	33		480	134	17					.282	.341	.753	92	18.7	.384	131	22.6
21	Albert Pujols A. Pujols	.412	475	1,771	367	591	138	7	114	381	220	28	227	8	8	2,036	1,085	259	1	16	31	54	.334	.613	1.025	424	174.7	.429	164	167.9
22	Cupid Childs C. Childs	.412	269	1,048	229	325	54	26	4	172	169	13	32	95		1,230	443	84					.310	.423	.835	257	73.5	.407	139	73.3
23	John McGraw J. McGraw	.412	239	881	181	262	25	17	6	104	145	26	49	57		1,052	339	48					.297	.385	.796	208	49.1	.395	122	38.2
24	Jimmy Bannon J. Bannon	.411	278	1,094	240	373	67	19	19	203	120	10	78	83		1,242	535	105	18				.341	.489	.900	270	56.5	.417	117	37.8
25	Billy Hamilton B. Hamilton	.410	295	1,159	298	356	34	25	5	137	174	27		232		1,360	455	64					.307	.393	.802	277	71	.394	128	58