who has the lowest on-base percentage in a season minimum 500 at bats

Andres Thomas has the worst on-base percentage with 500+ at-bats in a season, with an on-base percentage of .228 in 1989.

	NAME	OBP	AB	SEASON	TM	G	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	Andres Thomas A. Thomas	.228	554	1989	ATL	141	41	118	18	0	13	57	12	0	62	3	3	571	175	31	1	4	3	17	.213	.316	.544	32	-30.6	.242	44	-35.3
2	Hobe Ferris H. Ferris	.232	556	1909	SLA	148	36	120	18	5	4	58	12	0	58	11		583	160	27	15				.216	.288	.520	37	-19.8	.254	64	-21.4
3	Bobby Lowe B. Lowe	.236	507	1904	TOT	141	47	105	14	6	0	40	17	2	44	15		541	131	20	15				.207	.258	.494	32	-22.8	.238	57	-24.5
4	Hunter Hill H. Hill	.236	509	1904	TOT	135	37	104	9	1	0	31	17	4	42	14		554	115	10	24				.204	.226	.462	28	-28.1	.225	52	-28.2
5	Jim Levey J. Levey	.237	529	1933	SLA	141	43	103	10	4	2	36	26	3	68	4	6	567	127	16	9				.195	.240	.477	21	-44.5	.227	23	-58.3
6	Billy O'Brien B. O'Brien	.238	528	1888	WSH	133	42	119	15	2	9	66	9	0	70	10		537	165	26					.225	.313	.551	57	-13.4	.257	81	-13.6
7	Hal Lanier H. Lanier	.239	525	1967	SFG	151	37	112	16	3	0	42	16	2	61	2	2	557	134	19	13	1	2	17	.213	.255	.494	26	-30.2	.224	42	-35.6
8	Skeeter Webb S. Webb	.242	513	1944	CWS	139	44	108	19	6	0	30	20	1	39	7	3	540	139	25	6			10	.211	.271	.513	26	-32.5	.243	44	-34.4
9	Michael Doolin M. Doolin	.243	509	1907	PHN	145	33	104	19	7	1	47	25	1	46	18		544	140	27	9				.204	.275	.518	36	-17.1	.255	62	-21.5
10	Hobe Ferris H. Ferris	.245	563	1904	BSA	156	50	120	23	10	3	63	23	1	65	7		602	172	36	15				.213	.306	.551	46	-15	.263	71	-18.1
11	Joe Sommer J. Sommer	.245	560	1886	BAL	139	79	117	18	4	1	52	24	3		31		587	146	23					.209	.261	.506	58	-27.4	.243	69	-26.9
12	Buck Weaver B. Weaver	.245	523	1912	CWS	147	55	117	21	8	1	43	9	6	74	13	20	553	157	30	15				.224	.300	.546	34	-31.8	.260	55	-30.1
13	Bones Ely B. Ely	.247	519	1898	PIT	148	49	110	14	5	2	44	24	0	34	6		556	140	21	13				.212	.270	.517	38	-34.7	.252	52	-36.3
14	Vernon Wells V. Wells	.248	505	2011	LAA	131	60	110	15	4	25	66	20	1	86	9	4	529	208	44	0	3	0	8	.218	.412	.660	47	-12.8	.285	80	-12.6
15	Danny Richardson D. Richardson	.248	561	1888	NYG	135	82	127	16	7	8	61	15	1	35	35		577	181	31					.226	.323	.570	65	-10.4	.266	86	-11.3
16	Cookie Rojas C. Rojas	.248	621	1968	PHI	152	53	144	19	0	9	48	16	0	55	4	8	650	190	28	6	7	2	13	.232	.306	.554	42	-17.8	.251	65	-22.4
17	Zoilo Versalles Z. Versalles	.249	581	1967	MIN	160	63	116	16	7	6	50	33	6	113	5	3	626	164	29	3	3	2	15	.200	.282	.531	37	-25.4	.242	53	-31.1
18	Billy Shindle B. Shindle	.249	514	1888	BAL	135	61	107	14	8	1	53	20	8	47	52		542	140	23					.208	.272	.521	54	-16.6	.249	75	-18.3
19	Joe Cassidy J. Cassidy	.250	576	1905	WSH	151	67	124	16	4	1	43	25	2	87	23		626	151	21	23				.215	.262	.513	42	-24.4	.250	65	-23.2
20	Bill Kuehne B. Kuehne	.250	524	1888	PIT	138	60	123	22	11	3	62	9	2	68	34		535	176	36					.235	.336	.586	63	-7.4	.272	94	-4
21	Rougned Odor R. Odor	.252	607	2017	TEX	162	79	124	21	3	30	75	32	8	162	15	6	651	241	54	0	4	5	13	.204	.397	.649	53	-26.8	.272	57	-34.9
22	Lou Bierbauer L. Bierbauer	.252	500	1891	PIT	121	60	103	13	6	1	47	28	3	19	12		531	131	20					.206	.262	.514	44	-33.2	.253	58	-33.6
23	Hobe Ferris H. Ferris	.253	523	1905	BSA	142	51	115	24	16	6	59	23	0	69	11		558	189	46	12				.220	.361	.614	53	-5.6	.292	88	-6.9
24	Billy Hunter B. Hunter	.253	567	1953	SLA	154	50	124	18	1	1	37	24	2	45	3	1	604	147	20	11			12	.219	.259	.512	25	-46.9	.239	29	-53.1
25	Virgil Stallcup V. Stallcup	.253	539	1948	CIN	149	40	123	30	4	3	65	18	0	52	2		566	170	37	9			14	.228	.315	.569	33	-34	.264	47	-36.8