Jack Morris has the lowest career on-base percentage by a Hall of Famer, with an on-base percentage of .000.

Interpreted as:

worst obp by a hall of famer by a player

	NAME	OBP	HOF	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	Jack Morris J. Morris	.000	2018	22	1	4	0	0	0	0	0	0	0	0	0	0	1	0	0	0	0	0	0	.000	.000	.000	0	-0.3	.000	-114	-0.3
2	Lee Smith L. Smith	.090	2019	549	64	2	3	0	0	1	2	3	0	42	0	0	71	6	1	4	0	0	0	.047	.094	.183	-4	-12.4	.090	-61	-13
3	Trevor Hoffman T. Hoffman	.118	2018	538	34	1	4	2	0	0	5	0	0	11	0	0	36	6	2	2	0	0	0	.118	.176	.294	-2	-6.4	.127	-38	-6.3
4	Satchel Paige S. Paige	.118	1971	179	124	2	12	0	0	0	4	3	0	32	0	0	135	12	0	8	0	0	5	.097	.097	.215	-8	-24	.105	-52	-25.3
5	Pedro Martinez P. Martinez	.134	2015	277	434	22	43	6	2	0	18	15	3	190	0	0	518	53	8	63	3	0	5	.099	.122	.256	-27	-90.9	.121	-40	-92.1
6	Roy Halladay R. Halladay	.136	2019	115	275	15	34	2	0	0	12	4	0	137	0	0	305	36	2	26	0	0	2	.124	.131	.267	-14	-48.5	.121	-38	-50
7	Hoyt Wilhelm H. Wilhelm	.139	1985	1,062	432	24	38	3	1	1	21	26	0	166	0	1	493	46	5	34	1	0	8	.088	.106	.246	-20	-74.6	.122	-31	-77.1
8	Billy Wagner B. Wagner	.143	2025	438	20	1	2	0	0	0	1	1	0	12	0	0	21	2	0	0	0	0	0	.100	.100	.243	-1	-3.8	.119	-42	-3.8
9	Bert Blyleven B. Blyleven	.144	2011	216	451	19	59	7	0	0	25	5	2	193	0	0	514	66	7	56	0	0	4	.131	.146	.290	-15	-70.1	.134	-28	-73.2
10	Sandy Koufax S. Koufax	.145	1972	397	776	26	75	9	0	2	28	43	1	386	0	1	858	90	11	35	3	0	10	.097	.116	.261	-28	-122.6	.127	-25	-126.7
11	Rich Gossage R. Gossage	.146	2008	383	85	1	9	1	0	0	2	4	0	37	0	0	93	10	1	4	0	0	2	.106	.118	.264	-3	-13.4	.127	-31	-13.5
12	Nolan Ryan N. Ryan	.148	1999	424	852	40	94	10	2	2	36	38	0	371	3	3	957	114	14	65	2	0	11	.110	.134	.282	-28	-132.4	.135	-21	-130.1
13	Gaylord Perry G. Perry	.153	1991	510	1,076	48	141	17	0	6	47	22	6	369	0	0	1,220	176	23	113	3	0	20	.131	.164	.316	-20	-147.7	.146	-13	-154.9
14	Randy Johnson R. Johnson	.153	2015	273	625	20	78	14	0	1	40	19	2	296	0	0	691	95	15	44	1	0	10	.125	.152	.305	-25	-111.3	.140	-31	-117.3
15	Bruce Sutter B. Sutter	.153	2006	661	102	6	9	0	0	0	6	7	1	50	1	0	121	9	0	10	1	0	1	.088	.088	.241	-4	-17.9	.125	-38	-19.1
16	Dennis Eckersley D. Eckersley	.173	2004	147	181	9	24	3	0	3	12	9	0	84	0	0	196	36	6	5	1	0	1	.133	.199	.372	0	-22.4	.171	-8	-24.1
17	Phil Niekro P. Niekro	.183	1997	732	1,537	80	260	42	1	7	109	17	12	314	0	1	1,707	325	50	129	12	0	35	.169	.211	.395	11	-173.3	.180	0	-193.6
18	Don Sutton D. Sutton	.183	1998	611	1,354	64	195	15	1	0	64	60	6	365	1	0	1,559	212	16	136	3	0	29	.144	.157	.340	-10	-177.8	.162	-1	-178.7
19	Rollie Fingers R. Fingers	.186	1992	487	180	10	31	3	0	2	9	3	0	45	0	0	201	40	5	18	0	0	2	.172	.222	.408	2	-20.1	.186	16	-19.9
20	Jim Bunning J. Bunning	.188	1996	601	1,275	82	213	21	4	7	75	34	1	362	0	2	1,401	263	32	85	6	0	36	.167	.206	.395	12	-141.2	.180	6	-153.9
21	Mike Mussina M. Mussina	.189	2019	22	52	3	9	1	0	0	5	1	0	9	0	0	54	10	1	1	0	0	0	.173	.192	.381	0	-7.1	.172	-2	-7.1
22	Greg Maddux G. Maddux	.191	2014	737	1,591	103	272	35	2	5	84	34	5	419	11	3	1,812	326	42	180	2	0	15	.171	.205	.395	-1	-219.7	.179	-1	-228
23	Juan Marichal J. Marichal	.191	1983	464	1,221	73	202	29	2	4	75	38	2	269	2	5	1,339	247	35	71	7	0	20	.165	.202	.393	13	-128.4	.181	10	-138.1
24	Lefty Gomez L. Gomez	.194	1972	368	904	59	133	11	0	0	58	50	2	252	1		1,024	144	11	68			5	.147	.159	.353	-10	-136.6	.174	-2	-146.4
25	Rube Waddell R. Waddell	.197	1946	410	1,066	61	172	29	10	4	83	42	6	300	6		1,137	233	43	23				.161	.219	.416	38	-86.9	.202	26	-92.9