50 players are tied for the best on-base percentage when playing <20 seasons, with an on-base percentage of 1.000. The first three are Ryne Nelson, Jake Brentz and Connor Overton.

	NAME	OBP	SEAS	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	Ryne Nelson R. Nelson	1.000	4	1	1	1	1	0	0	0	1	0	0	0	0	0	1	1	0	0	0	0	0	1.000	1.000	2.000	1	0.5	.888	490	0.5
2	Jake Brentz J. Brentz	1.000	2	6	0	0	0	0	0	0	0	1	0	0	0	0	1	0	0	0	0	0	0				0	0.3	.692	350	0.3
3	Connor Overton C. Overton	1.000	3	6	1	1	1	0	0	0	2	0	0	0	0	0	1	1	0	0	0	0	0	1.000	1.000	2.000	1	0.5	.879	461	0.5
4	Justin Bruihl J. Bruihl	1.000	5	22	0	0	0	0	0	0	0	1	0	0	0	0	1	0	0	0	0	0	0				0	0.3	.692	343	0.3
5	Gregory Soto G. Soto	1.000	7	7	2	0	2	0	0	0	0	0	0	0	0	0	2	2	0	0	0	0	0	1.000	1.000	2.000	1	1	.870	470	0.9
6	Jacob Barnes J. Barnes	1.000	10	173	0	0	0	0	0	0	0	1	0	0	0	0	1	0	0	0	0	0	0				0	0.3	.693	338	0.3
7	Cody Ege C. Ege	1.000	1	5	1	0	1	0	0	0	0	0	0	0	0	0	1	1	0	0	0	0	0	1.000	1.000	2.000	1	0.5	.878	476	0.5
8	Jose Torres J. Torres	1.000	2	61	1	1	1	0	0	0	0	0	0	0	0	0	1	1	0	0	0	0	0	1.000	1.000	2.000	1	0.5	.877	463	0.5
9	Jason Garcia J. Garcia	1.000	1	3	0	0	0	0	0	0	0	1	0	0	0	0	1	0	0	0	0	0	0				0	0.3	.687	354	0.3
10	Keith Hessler K. Hessler	1.000	2	35	1	0	1	0	0	0	0	0	0	0	0	0	1	1	0	0	0	0	0	1.000	1.000	2.000	1	0.5	.881	481	0.4
11	Branden Pinder B. Pinder	1.000	2	2	1	0	1	1	0	0	1	0	0	0	0	0	1	2	1	0	0	0	0	1.000	2.000	3.000	1	0.8	1.256	747	0.7
12	Gus Schlosser G. Schlosser	1.000	1	14	1	0	1	0	0	0	0	0	0	0	0	0	1	1	0	0	0	0	0	1.000	1.000	2.000	1	0.4	.892	494	0.4
13	Andrew Albers A. Albers	1.000	5	1	1	0	1	0	0	0	1	0	0	0	0	0	3	1	0	2	0	0	0	1.000	1.000	2.000	2	1.4	.877	483	1.4
14	Robert Carson R. Carson	1.000	2	14	0	1	0	0	0	0	0	1	0	0	0	0	1	0	0	0	0	0	0				0	0.3	.690	364	0.3
15	J.J. Hoover	1.000	7	117	0	1	0	0	0	0	0	1	0	0	0	0	1	0	0	0	0	0	0				0	0.3	.689	354	0.3
16	Will Smith W. Smith	1.000	12	227	1	0	1	0	0	0	2	0	0	0	0	0	2	1	0	1	0	0	0	1.000	1.000	2.000	1	1	.870	459	0.9
17	Jeremy Horst J. Horst	1.000	3	12	1	0	1	0	0	0	1	0	0	0	0	0	1	1	0	0	0	0	0	1.000	1.000	2.000	1	0.5	.890	490	0.5
18	Aaron Thompson A. Thompson	1.000	3	4	0	0	0	0	0	0	0	1	0	0	0	0	1	0	0	0	0	0	0				0	0.3	.694	359	0.3
19	Brian Schlitter B. Schlitter	1.000	4	57	1	0	1	0	0	0	0	0	0	0	0	0	1	1	0	0	0	0	0	1.000	1.000	2.000	1	0.4	.892	494	0.4
20	Mark Melancon M. Melancon	1.000	14	332	0	0	0	0	0	0	0	1	0	0	0	0	2	0	0	1	0	0	0				0	0.3	.694	179	0.3
21	Cedrick Bowers C. Bowers	1.000	2	5	0	1	0	0	0	0	0	1	0	0	0	0	1	0	0	0	0	0	0				0	0.3	.708	338	0.3
22	Bobby Korecky B. Korecky	1.000	4	2	1	0	1	0	0	0	0	0	0	0	0	0	1	1	0	0	0	0	0	1.000	1.000	2.000	1	0.5	.896	480	0.5
23	Evan Meek E. Meek	1.000	6	66	1	0	1	0	0	0	0	0	0	0	0	0	2	1	0	1	0	0	0	1.000	1.000	2.000	1	0.9	.895	482	0.9
24	Matt Tupman M. Tupman	1.000	1	1	1	0	1	0	0	0	0	0	0	0	0	0	1	1	0	0	0	0	0	1.000	1.000	2.000	1	0.5	.896	476	0.5
25	David Davidson D. Davidson	1.000	2	1	1	0	1	0	0	0	0	0	0	0	0	0	1	1	0	0	0	0	0	1.000	1.000	2.000	1	0.5	.895	477	0.5