Dean Chance has the lowest career batting average with 550+ at-bats, with an average of .066.

	NAME	AVG	AB	G	R	H	2B	3B	HR	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	OBP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Dean Chance D. Chance	.066	662	403	17	44	2	0	0	16	30	5	420	0	0	759	46	2	61	1	0	2	.113	.069	.183	-40	-119.7	.093	-47	-124.2
2	Dick Ellsworth D. Ellsworth	.088	673	407	32	59	2	2	0	22	46	4	322	0	0	774	65	4	50	1	0	3	.151	.097	.247	-24	-106.6	.125	-32	-115.6
3	Bob Buhl B. Buhl	.089	857	454	31	76	2	0	0	26	38	2	389	2	2	952	78	2	53			10	.129	.091	.220	-48	-154.7	.109	-38	-158.8
4	Sandy Koufax S. Koufax	.097	776	397	26	75	9	0	2	28	43	1	386	0	1	858	90	11	35	3	0	10	.145	.116	.261	-28	-122.6	.127	-25	-126.7
5	Aaron Harang A. Harang	.097	670	335	16	65	8	0	1	21	5	2	294	0	0	747	76	9	69	1	0	11	.106	.113	.220	-49	-136.9	.099	-53	-140.8
6	Ryan Dempster R. Dempster	.099	588	515	23	58	9	2	0	17	13	0	221	0	0	686	71	11	85	0	0	3	.118	.121	.239	-41	-123.8	.109	-47	-127.5
7	Bill Monbouquette B. Monbouquette	.103	582	343	35	60	3	1	0	18	49	0	249	1	0	700	65	4	69	0	0	4	.173	.112	.284	-13	-89.9	.143	-20	-98.9
8	Jason Schmidt J. Schmidt	.106	597	309	29	63	9	0	7	21	22	2	282	0	0	712	93	16	90	1	0	5	.140	.156	.296	-29	-117.6	.136	-31	-120.5
9	Mickey Lolich M. Lolich	.110	821	477	63	90	5	2	0	31	105	5	362	1	1	1,017	99	7	85	1	0	20	.215	.121	.335	6	-99.6	.174	4	-107.7
10	Preacher Roe P. Roe	.110	620	333	37	68	3	0	1	28	38	0	215	0	0	721	74	4	63	0		7	.161	.119	.280	-24	-107.5	.143	-29	-115.2
11	Bob Purkey B. Purkey	.110	645	385	53	71	9	3	6	42	38	4	325	0	0	748	104	18	56	5		5	.163	.161	.325	-11	-95.4	.154	-15	-103.9
12	Nolan Ryan N. Ryan	.110	852	424	40	94	10	2	2	36	38	0	371	3	3	957	114	14	65	2	0	11	.148	.134	.282	-28	-132.4	.135	-21	-130.1
13	Jack Billingham J. Billingham	.111	559	396	21	62	8	0	0	23	27	0	206	0	0	656	70	8	69	1	0	10	.152	.125	.277	-18	-88.7	.135	-22	-91.9
14	Terry Mulholland T. Mulholland	.111	619	495	26	69	13	1	2	23	13	1	281	1	1	687	90	16	53	1	0	7	.131	.145	.276	-28	-109.1	.126	-34	-110.6
15	Bob Veale B. Veale	.114	630	349	26	72	7	1	0	18	18	0	337	0	0	676	81	8	28	0	0	8	.139	.129	.267	-20	-90.5	.125	-26	-95.6
16	Tully Sparks T. Sparks	.115	801	314	45	92	16	4	0	41	52	3	203	0		887	116	20	31				.172	.145	.317	5	-92	.162	4	-99.4
17	Mike Cuellar M. Cuellar	.115	661	316	37	76	8	4	7	33	9	1	304	0	0	716	113	19	43	2	0	5	.128	.171	.299	-17	-90.9	.136	-18	-94.9
18	Steve Barber S. Barber	.115	563	398	24	65	5	2	5	27	38	2	320	0	1	649	89	12	45	1	0	2	.174	.158	.332	-4	-73.6	.159	-3	-76.7
19	Jerry Koosman J. Koosman	.119	915	431	36	109	12	1	2	46	33	2	418	1	0	1,052	129	15	100	2	0	19	.151	.141	.292	-24	-137.2	.139	-18	-140.7
20	Matt Cain M. Cain	.121	611	332	27	74	13	1	7	34	21	1	308	0	0	708	110	21	73	2	0	1	.151	.180	.331	-17	-100	.149	-17	-100.6
21	Bob Friend B. Friend	.121	1,137	602	56	138	16	2	2	60	38	0	375	0	0	1,297	164	20	120	2	0	14	.150	.144	.294	-38	-183.5	.138	-25	-193.9
22	Si Johnson S. Johnson	.123	709	489	29	87	4	1	0	20	20	0	213	0		759	93	5	30			6	.147	.131	.278	-29	-119.7	.135	-30	-120.6
23	Ray Culp R. Culp	.123	602	312	40	74	8	2	1	34	26	1	292	0	1	696	89	11	67	0	0	8	.161	.148	.308	-10	-82.7	.146	-16	-90.1
24	Burt Hooton B. Hooton	.123	748	452	42	92	18	0	4	49	44	2	243	0	1	913	122	22	117	2	0	6	.173	.163	.336	-8	-108.1	.162	-8	-111.9
25	Milt Pappas M. Pappas	.123	1,073	527	72	132	13	3	20	67	36	8	510	1	0	1,174	211	36	52	5	0	13	.157	.197	.354	-6	-131.8	.163	-5	-143.4