Fred Gladding has the worst career on-base percentage when making >50 plate appearances, with an on-base percentage of .016.

Interpreted as:

lowest obp by a player with >50 pa MLB history

	NAME	OBP	PA	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	Fred Gladding F. Gladding	.016	68	421	63	1	1	0	0	0	3	0	0	40	0	0	1	0	4	1	0	1	.016	.016	.031	-8	-14.8	.014	-101	-15.4
2	John Gant J. Gant	.035	68	137	57	2	2	0	0	2	3	0	0	25	0	0	8	2	11	0	0	0	.035	.140	.175	-6	-14	.071	-67	-14.2
3	Ivan Nova I. Nova	.040	166	79	149	2	6	0	0	0	0	0	0	96	0	0	6	0	17	0	0	1	.040	.040	.081	-19	-38.7	.035	-91	-39.4
4	Rick Van Den Hurk R. Van Den Hurk	.042	54	32	47	1	1	0	0	0	0	1	0	31	0	0	1	0	6	0	0	0	.021	.021	.063	-7	-13.3	.033	-99	-13.6
5	Mike Bolsinger M. Bolsinger	.045	69	36	66	2	3	1	0	0	1	0	0	37	0	0	4	1	3	0	0	0	.045	.061	.106	-7	-14.6	.046	-84	-14.8
6	Andrew Miller A. Miller	.054	78	176	74	1	4	0	0	0	3	0	0	38	0	0	4	0	4	0	0	0	.054	.054	.108	-8	-17.8	.048	-89	-18.2
7	Chuck Finley C. Finley	.057	59	24	53	3	3	1	0	0	1	0	0	26	0	0	4	1	6	0	0	1	.057	.075	.132	-6	-13.3	.057	-79	-13.5
8	Alec Mills A. Mills	.060	54	49	50	1	3	1	0	0	0	0	0	35	0	0	4	1	4	0	0	0	.060	.080	.140	-5	-11.6	.060	-72	-11.9
9	Aaron Heilman A. Heilman	.061	54	306	47	1	1	0	0	0	1	2	0	24	0	0	1	0	5	0	0	0	.021	.021	.083	-6	-12.8	.047	-88	-12.9
10	Sal Romano S. Romano	.062	74	76	64	1	3	2	0	0	2	1	0	41	0	0	5	2	9	0	0	1	.047	.078	.140	-7	-15.6	.062	-75	-16.2
11	Drew Smyly D. Smyly	.062	67	44	64	1	3	0	0	0	0	1	0	29	0	0	3	0	2	0	0	0	.047	.047	.108	-7	-14.8	.051	-79	-15.3
12	Ray Fontenot R. Fontenot	.063	52	81	48	3	3	0	0	0	0	0	0	24	0	0	3	0	4	0	0	1	.063	.063	.125	-5	-10.7	.056	-87	-11.1
13	Ron Herbel R. Herbel	.065	225	318	206	6	6	2	0	0	3	8	0	125	0	1	8	2	11	0	0	2	.029	.039	.104	-18	-42.1	.055	-71	-44
14	Jim Duckworth J. Duckworth	.066	65	97	59	1	2	0	0	0	1	1	1	39	0	0	2	0	4	0	0	0	.034	.034	.099	-5	-12.3	.052	-75	-13
15	Don Carman D. Carman	.066	239	339	209	3	12	0	0	0	5	2	0	75	0	1	12	0	28	0	0	5	.057	.057	.124	-21	-48.8	.058	-81	-49.7
16	Elieser Hernández E. Hernández	.067	53	63	44	1	2	0	0	0	0	1	0	24	0	0	2	0	8	0	0	0	.045	.045	.112	-5	-11.6	.054	-72	-11.7
17	Vicente Palacios V. Palacios	.067	101	127	88	2	4	0	0	0	0	2	0	43	0	0	4	0	11	0	0	1	.045	.045	.112	-10	-21.9	.056	-80	-21.9
18	Erick Fedde E. Fedde	.068	85	61	71	2	3	0	0	0	1	2	0	28	0	0	3	0	11	1	0	1	.042	.042	.110	-8	-18.5	.054	-76	-19.1
19	Roberto Hernandez R. Hernandez	.068	85	44	73	2	4	0	0	0	2	1	0	40	0	0	4	0	11	0	0	0	.055	.055	.122	-8	-17	.057	-76	-17.2
20	Justin Nicolino J. Nicolino	.068	64	50	58	0	3	0	0	0	0	1	0	21	0	0	3	0	5	0	0	1	.052	.052	.120	-6	-13.7	.056	-77	-13.7
21	Wei-Yin Chen W. Chen	.068	111	102	103	2	7	1	0	0	2	0	0	46	0	0	8	1	8	0	0	2	.068	.078	.146	-10	-23.4	.063	-71	-23.4
22	Brad Hand B. Hand	.069	87	320	72	2	5	0	0	0	4	0	0	22	0	0	5	0	15	0	0	2	.069	.069	.139	-7	-17.1	.062	-73	-17.3
23	Don Kaiser D. Kaiser	.070	71	58	68	2	4	0	0	0	2	1	0	38	0	0	4	0	0	2	0	0	.059	.059	.129	-7	-14.7	.061	-78	-15.2
24	Sean Newcomb S. Newcomb	.071	98	128	81	4	3	1	0	0	1	3	0	57	0	0	4	1	14	0	0	1	.037	.049	.121	-9	-20.9	.060	-76	-21.7
25	Antonio Senzatela A. Senzatela	.074	165	106	135	5	9	2	0	0	12	1	0	76	0	0	11	2	29	0	0	0	.067	.081	.155	-14	-34.5	.068	-82	-38.4