highest obp by a player before turning 20

10 players are tied for the highest career on-base percentage by a player younger than 20, with an on-base percentage of 1.000. The first three are John Paciorek, Fred Vandusen and Gus Keriazakos.

Interpreted as:

highest obp by a player before turning 20 years old

	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
1	John Paciorek J. Paciorek	1.000	1	3	4	3	0	0	0	3	2	0	0	0	0	5	3	0	0	0	0	0	1.000	1.000	2.000
2	Fred Vandusen F. Vandusen	1.000	1	0	0	0	0	0	0	0	0	1	0	0	0	1	0	0	0	0	0	0
3	Gus Keriazakos G. Keriazakos	1.000	1	1	0	1	0	0	0	0	0	0	0	0	0	1	1	0	0		0	0	1.000	1.000	2.000
4	Bud Swartz B. Swartz	1.000	5	1	0	1	0	0	0	0	0	0	0	0		1	1	0	0			0	1.000	1.000	2.000
5	Pete Rambo P. Rambo	1.000	1	1	0	1	0	0	0	0	0	0	0	0	0	1	1	0	0				1.000	1.000	2.000
6	Johnny Welch J. Welch	1.000	3	1	0	1	0	0	0	0	0	0	0	0		1	1	0	0				1.000	1.000	2.000
7	Uel Eubanks U. Eubanks	1.000	2	1	1	1	1	0	0	0	0	0	0	0		1	2	1	0				1.000	2.000	3.000
8	Dutch Henry D. Henry	1.000	4	1	0	1	0	0	0	0	0	0	0	0		1	1	0	0				1.000	1.000	2.000
9	Doc Bass D. Bass	1.000	2	1	1	1	0	0	0	0	0	0	0	1		1	1	0	0				1.000	1.000	2.000
10	Earl Blackburn E. Blackburn	1.000	2	0	0	0	0	0	0	0	1	0	0	0		1	0	0	0
11	Jim Breazeale J. Breazeale	.667	2	1	1	0	0	0	0	0	2	0	0	0	0	3	0	0	0	0	0	0	.000	.000	.667
12	Al Epperly A. Epperly	.600	2	3	2	1	0	0	0	3	2	0	0	0		5	1	0	0				.333	.333	.933
13	Jim Baumer J. Baumer	.571	8	10	2	4	1	1	0	2	2	2	1	0		14	7	2	0			0	.400	.700	1.271
14	Fred Hutchinson F. Hutchinson	.545	4	11	3	6	0	0	0	3	0	0	0	0		11	6	0	0			0	.545	.545	1.091
15	Mike Ivie M. Ivie	.526	6	17	0	8	0	0	0	3	1	1	1	0	0	19	8	0	0	0	1	3	.471	.471	.997
16	Jose Reyes J. Reyes	.500	1	4	2	2	1	0	0	0	0	0	0	0	0	4	3	1	0	0	0	0	.500	.750	1.250
17	Mark Davis M. Davis	.500	2	2	1	1	0	0	0	0	0	0	0	0	0	2	1	0	0	0	0	0	.500	.500	1.000
18	Rowland Office R. Office	.500	2	5	1	2	0	0	0	0	1	0	2	0	0	6	2	0	0	0	0	0	.400	.400	.900
19	Lloyd Allen L. Allen	.500	4	2	0	1	1	0	0	0	0	0	0	0	0	2	2	1	0	0	0	0	.500	1.000	1.500
20	Vida Blue V. Blue	.500	1	1	0	0	0	0	0	0	1	0	0	0	0	2	0	0	0	0	0	0	.000	.000	.500
21	Ted Simmons T. Simmons	.500	2	3	0	1	0	0	0	0	1	0	1	0	0	4	1	0	0	0	0	0	.333	.333	.833
22	Mike Adamson M. Adamson	.500	3	2	1	1	0	1	0	1	0	0	1	0	0	2	3	1	0	0	0	0	.500	1.500	2.000
23	Frank Tepedino F. Tepedino	.500	9	5	0	2	0	0	0	0	1	0	1	0	0	6	2	0	0	0	0	0	.400	.400	.900
24	Don Buschhorn D. Buschhorn	.500	13	4	0	2	0	0	0	0	0	0	2	0	0	4	2	0	0	0	0	0	.500	.500	1.000
25	Dave Skaugstad D. Skaugstad	.500	2	1	0	0	0	0	0	0	1	0	1	0	0	2	0	0	0	0	0	0	.000	.000	.500