highest career on base percentage by a pitcher

Cy Young has the best career on-base percentage by a pitcher, with an on-base percentage of .234.

Interpreted as:

highest career on base percentage with a minimum of 3000 PA by a pitcher

	NAME	OBP	PA	SEASON	TM	G	AB	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	TB	XBH	SH	AVG	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Cy Young C. Young	.123	65	1890	CLN	17	65	6	8	2	0	0	4	0	0	8	1	10	2		.123	.154	.277	-1	-11.1	.131	-11	-11
2	Cy Young C. Young	.216	185	1891	CLE	55	174	23	29	5	2	1	18	11	0	30	2	41	8		.167	.236	.452	11	-16.1	.222	36	-17.6
3	Cy Young C. Young	.191	204	1892	CLE	53	196	14	31	5	0	1	15	7	1	35	3	39	6		.158	.199	.390	8	-19	.193	26	-21.1
4	Cy Young C. Young	.251	191	1893	CLE	53	187	23	44	4	0	1	27	4	0	15	2	51	5		.235	.273	.524	13	-17.6	.252	38	-19.9
5	Cy Young C. Young	.223	188	1894	CLE	52	186	24	40	8	4	2	26	2	0	20	4	62	14	0	.215	.333	.557	9	-25.3	.245	22	-27.9
6	Cy Young C. Young	.276	154	1895	CLE	47	140	20	30	5	2	0	13	11	1	20	0	39	7	2	.214	.279	.555	13	-12.8	.271	44	-14.8
7	Cy Young C. Young	.304	186	1896	CLE	53	180	31	52	11	3	3	28	4	0	15	1	78	17	2	.289	.433	.738	26	-2.9	.336	83	-5.1
8	Cy Young C. Young	.237	159	1897	CLE	48	153	14	34	4	3	0	19	2	1	22	4	44	7	3	.222	.288	.525	9	-14.7	.246	37	-15.8
9	Cy Young C. Young	.299	169	1898	CLE	47	154	20	39	4	1	2	13	8	2	12	2	51	7	5	.253	.331	.630	19	-3.5	.307	80	-4.6
10	Cy Young C. Young	.227	156	1899	STL	44	148	22	32	5	3	1	18	2	0	12	1	46	9	6	.216	.311	.537	10	-11.6	.250	44	-12.8
11	Cy Young C. Young	.209	130	1900	STL	41	124	13	22	5	1	1	13	3	2	7	1	32	7	1	.177	.258	.467	6	-12.1	.223	29	-13.2
12	Cy Young C. Young	.244	163	1901	BSA	45	153	20	32	2	5	0	17	6	1	16	1	44	7	3	.209	.288	.531	12	-9.6	.251	50	-11.6
13	Cy Young C. Young	.255	154	1902	BSA	45	148	17	34	4	1	1	12	5	0	20	0	43	6	1	.230	.291	.545	11	-6.7	.262	54	-9.6
14	Cy Young C. Young	.340	146	1903	BSA	41	137	21	44	6	3	1	14	4	0	20	2	59	10	5	.321	.431	.771	22	4.6	.360	126	4.6
15	Cy Young C. Young	.223	149	1904	BSA	43	148	14	33	3	3	1	10	0	0	25	1	45	7	1	.223	.304	.527	10	-5.2	.248	62	-6
16	Cy Young C. Young	.177	126	1905	BSA	38	120	8	18	2	1	2	10	4	0	29	0	28	5	2	.150	.233	.411	4	-9.2	.200	29	-9.5
17	Cy Young C. Young	.178	109	1906	BSA	40	104	9	16	3	2	0	5	3	0	21	0	23	5	2	.154	.221	.399	3	-8	.194	25	-8.5
18	Cy Young C. Young	.228	128	1907	BSA	46	125	10	27	1	0	1	5	1	1	14	3	31	2	1	.216	.248	.476	7	-5.8	.234	49	-6.5
19	Cy Young C. Young	.226	117	1908	BOS	36	115	9	26	3	0	0	8	0	0	14	0	29	3	2	.226	.252	.478	6	-4.9	.230	51	-5.6
20	Cy Young C. Young	.204	114	1909	CLE	35	107	6	21	2	0	0	7	1	0	12	1	23	2	6	.196	.215	.419	4	-7.5	.204	31	-7.9
21	Cy Young C. Young	.203	62	1910	CLE	21	55	0	8	3	1	0	5	3	1	6	0	13	4	3	.145	.236	.440	2	-4.1	.219	34	-4.2
22	Cy Young C. Young	.073	46	1911	TOT	18	41	1	3	0	0	0	3	0	0	8	0	3	0	5	.073	.073	.146	-4	-9.1	.070	-66	-9.7
	Total	.234	3,101			918	2,960	325	623	87	35	18	290	81	10	373	29	834	140	50	.210	.282	.516	198	-212.2	.245	45	-238.4