highest obp by a national league rookie in a season minimum 400 pa

Roy Thomas has the best on-base percentage by an NL rookie with 400+ plate appearances, with an on-base percentage of .457 in 1899.

	NAME	OBP	PA	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	TB	XBH	SH	SF	IBB	GIDP	AVG	SLG	OPS	wRC	WRAA	wOBA	wRC+	BRAA
1	Roy Thomas R. Thomas	.457	702	1899	PHI	150	547	137	178	12	4	0	47	115	17	45	42		198	16	23				.325	.362	.819	137	39.9	.414	137	37.6
2	Bernie Carbo B. Carbo	.454	467	1970	CIN	125	365	54	113	19	3	21	63	94	4	77	10	4	201	43	2	2	9	6	.310	.551	1.004	97	44	.441	170	40.8
3	Fred Snodgrass F. Snodgrass	.440	493	1910	NYG	123	396	69	127	22	8	2	44	71	13	52	33		171	32	13				.321	.432	.871	87	36.2	.427	152	29.6
4	Elmer Flick E. Flick	.430	565	1898	PHI	134	453	84	137	16	13	8	81	86	15	36	23		203	37	11				.302	.448	.878	114	40.2	.427	149	37.8
5	Fielder Jones F. Jones	.427	451	1896	BKN	104	395	82	140	10	8	3	46	48	2	15	18		175	21	6				.354	.443	.870	94	24.4	.417	135	25.3
6	Ginger Beaumont G. Beaumont	.416	489	1899	PIT	111	437	90	154	15	8	3	38	41	7	27	31		194	26	4				.352	.444	.860	95	27.4	.413	135	25.1
7	Jimmy Williams J. Williams	.416	693	1899	PIT	153	621	126	220	28	27	9	116	60	6	51	26		329	64	6				.354	.530	.946	150	54.3	.441	151	51.1
8	George Watkins G. Watkins	.415	424	1930	SLN	119	391	85	146	32	7	17	87	24	4	49	5		243	56	5				.373	.621	1.037	95	35.2	.449	142	28
9	Jimmy Bannon J. Bannon	.414	566	1894	BSN	128	494	130	166	29	10	13	114	62	4	42	47		254	52	6				.336	.514	.928	127	24.6	.422	114	14.9
10	Paul Waner P. Waner	.413	618	1926	PIT	144	536	101	180	35	22	8	79	66	4	19	11		283	65	12				.336	.528	.941	116	41.4	.430	148	36.3
11	Richie Ashburn R. Ashburn	.410	530	1948	PHN	117	463	78	154	17	4	2	40	60	1	22	32		185	23	6			1	.333	.400	.810	81	18.3	.385	127	17.5
12	Austin Kearns A. Kearns	.407	435	2002	CIN	107	372	66	117	24	3	13	56	54	6	81	6	3	186	40	0	3	3	11	.315	.500	.907	77	24.4	.394	139	21.2
13	Ray Grimes R. Grimes	.406	622	1921	CHC	147	530	91	170	38	6	6	79	70	6	55	5	8	238	50	16				.321	.449	.855	103	25	.397	130	23.6
14	Chick Stahl C. Stahl	.406	515	1897	BSN	114	469	112	166	30	13	4	97	38	3	18	18		234	47	5				.354	.499	.905	107	29.7	.421	129	23.8
15	Juan Soto J. Soto	.406	494	2018	WSH	116	414	77	121	25	1	22	70	79	0	99	5	2	214	48	1	0	10	9	.292	.517	.923	89	31.1	.392	145	27.3
16	Earl Torgeson E. Torgeson	.403	484	1947	BSN	128	399	73	112	20	6	16	78	82	0	59	11		192	42	3			6	.281	.481	.885	82	27.4	.410	134	20.8
17	Johnny Gooch J. Gooch	.403	401	1922	PIT	105	353	45	116	15	3	1	42	39	5	15	1	1	140	19	4				.329	.397	.800	60	9.9	.379	111	6
18	Albert Pujols A. Pujols	.403	676	2001	STL	161	590	112	194	47	4	37	130	69	9	93	1	3	360	88	1	7	6	21	.329	.610	1.013	139	54.7	.423	159	51.9
19	Johnny Mize J. Mize	.402	469	1936	SLN	126	414	76	136	30	8	19	93	50	1	32	1		239	57	4			4	.329	.577	.979	95	33.9	.436	156	33.6
20	Kiki Cuyler K. Cuyler	.402	515	1924	PIT	117	466	94	165	27	16	9	85	30	7	62	32	11	251	52	12				.354	.539	.940	96	32.9	.428	148	31
21	Mitch Meluskey M. Meluskey	.401	400	2000	HOU	117	337	47	101	21	0	14	69	55	4	74	1	0	164	35	1	3	10	7	.300	.487	.888	67	14.1	.381	119	10.1
22	Jimmy Barrett J. Barrett	.400	632	1900	CIN	137	545	114	172	11	7	5	42	72	5	63	44		212	23	10				.316	.389	.789	109	22.7	.384	119	17.1
23	Jim Viox J. Viox	.399	578	1913	PIT	137	492	86	156	32	8	2	65	64	3	28	14	14	210	42	19				.317	.427	.826	92	29.1	.396	138	26.2
24	Billy Grabarkewitz B. Grabarkewitz	.399	640	1970	LAD	156	529	92	153	20	8	17	84	95	6	149	19	9	240	45	3	7	8	8	.289	.454	.852	103	30.5	.380	135	27.6
25	Bill Everitt B. Everitt	.399	596	1895	CHI	133	550	129	197	16	10	3	88	33	4	42	47		242	29	9				.358	.440	.839	118	19.2	.397	111	11.4