best on base percentage by a rookie major league player with a minimum of 150 games

Roy Thomas has the best on-base percentage by a rookie with 150+ games played, with an on-base percentage of .457 in 1899.

	NAME	OBP	G	SEASON	TM	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	Roy Thomas R. Thomas	.457	150	1899	PHI	547	137	178	12	4	0	47	115	17	45	42		702	198	16	23				.325	.362	.819	137	39.9	.414	137	37.6
2	Benny Kauff B. Kauff	.447	154	1914	IND	571	120	211	44	13	8	95	72	8	55	75		667	305	65	16				.370	.534	.981	136	66	.465	167	52.6
3	Aaron Judge A. Judge	.422	155	2017	NYY	542	128	154	24	3	52	114	127	5	208	9	4	678	340	79	0	4	11	15	.284	.627	1.049	145	62.5	.430	174	61.5
4	Jimmy Williams J. Williams	.416	153	1899	PIT	621	126	220	28	27	9	116	60	6	51	26		693	329	64	6				.354	.530	.946	150	54.3	.441	151	51.1
5	Lu Blue L. Blue	.416	153	1921	DET	585	103	180	33	11	5	75	103	5	47	13	17	709	250	49	16				.308	.427	.843	116	27.7	.396	120	19.2
6	Les Fleming L. Fleming	.412	156	1942	CLE	548	71	160	27	4	14	82	106	6	57	6	8	662	237	45	2			13	.292	.432	.845	109	38.3	.404	144	34.3
7	Joe Sewell J. Sewell	.412	154	1921	CLE	572	101	182	36	12	4	93	80	11	17	7	6	683	254	52	20				.318	.444	.856	114	28.3	.399	120	18.4
8	Earle Combs E. Combs	.411	150	1925	NYY	593	117	203	36	13	3	62	65	4	43	12	13	673	274	52	11				.342	.462	.873	116	27.8	.403	124	22.6
9	Al Rosen A. Rosen	.405	155	1950	CLE	554	100	159	23	4	37	116	100	10	72	5	7	668	301	64	4			27	.287	.543	.948	127	43.5	.426	143	39.6
10	Albert Pujols A. Pujols	.403	161	2001	STL	590	112	194	47	4	37	130	69	9	93	1	3	676	360	88	1	7	6	21	.329	.610	1.013	139	54.7	.423	159	51.9
11	Kevin Seitzer K. Seitzer	.399	161	1987	KCR	641	105	207	33	8	15	83	80	2	85	12	7	725	301	56	1	1	0	18	.323	.470	.869	124	34.5	.383	134	31.3
12	Billy Grabarkewitz B. Grabarkewitz	.399	156	1970	LAD	529	92	153	20	8	17	84	95	6	149	19	9	640	240	45	3	7	8	8	.289	.454	.852	103	30.5	.380	135	27.6
13	Earl Averill E. Averill	.398	152	1929	CLE	597	110	198	43	13	18	96	63	3	53	13	14	680	321	74	17				.332	.538	.936	127	37.3	.418	135	32
14	Dale Alexander D. Alexander	.397	155	1929	DET	626	110	215	43	15	25	137	56	0	63	5	9	700	363	83	18				.343	.580	.977	139	46.4	.431	143	40.9
15	Del Bissonette D. Bissonette	.396	155	1928	BKN	587	90	188	30	13	25	106	70	4	75	5		669	319	68	8				.320	.543	.940	124	42.6	.424	143	37.9
16	Lloyd Waner L. Waner	.396	150	1927	PIT	629	133	223	17	6	2	27	37	6	23	14		683	258	25	11				.355	.410	.806	102	18.4	.379	115	12.7
17	Ed Bouchee E. Bouchee	.394	154	1957	PHI	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
18	Greg Gross G. Gross	.393	156	1974	HOU	589	78	185	21	8	0	36	76	1	39	12	20	676	222	29	9	1	4	13	.314	.377	.770	93	20.1	.358	125	19
19	Alvin Davis A. Davis	.391	152	1984	SEA	567	80	161	34	3	27	116	97	7	78	5	4	678	282	64	0	7	16	7	.284	.497	.888	113	37.1	.389	140	31.9
20	Hal Trosky Sr. H. Trosky Sr.	.388	154	1934	CLE	625	117	206	45	9	35	142	58	2	49	2	2	685	374	89	0				.330	.598	.987	139	52.9	.437	143	41.2
21	Jeff Bagwell J. Bagwell	.387	156	1991	HOU	554	79	163	26	4	15	82	75	13	116	7	4	650	242	45	1	7	5	12	.294	.437	.824	100	26.2	.370	138	28.1
22	Ben Grieve B. Grieve	.386	155	1998	OAK	583	94	168	41	2	18	89	85	9	123	2	2	678	267	61	0	1	3	18	.288	.458	.844	108	23.8	.373	124	20.7
23	Jackie Robinson J. Robinson	.383	151	1947	BKN	590	125	175	31	5	12	48	74	9	36	29		701	252	48	28			5	.297	.427	.810	103	23.8	.380	115	13.5
24	Jim Gilliam J. Gilliam	.383	151	1953	BKN	605	125	168	31	17	6	63	100	3	38	21	14	710	251	54	2			7	.278	.415	.798	103	18	.367	109	8.4
25	Pinky Higgins P. Higgins	.383	152	1933	PHA	567	85	178	34	12	13	99	61	2	53	2	7	635	275	59	5				.314	.485	.868	107	32.9	.398	125	21.2