The Chicago White Sox had their highest batting average against left-handed pitchers in a season in 1999, with an average of .295.

Interpreted as:

highest white sox batter average in a regular season vs lhp

	TEAM	AVG	SEASON	G	W%	W	L	AB	H	2B	3B	HR	RBI	BB	HBP	SO	PA	TB	XBH	SH	SF	IBB	OBP	SLG	OPS
1	White Sox	.295	1999	105	.603	765	504	1,151	339	54	10	31	142	109	8	174	1,291	506	95	11	11	7	.357	.440	.796
2	White Sox	.290	1996	132	.548	1,019	841	1,614	468	90	10	59	266	206	10	259	1,860	755	159	11	19	23	.370	.468	.838
3	White Sox	.288	1977	104	.612	1,207	765	1,731	498	79	17	61	280	193	11	190	1,972	794	157	12	25	12	.358	.459	.817
4	White Sox	.285	2020	41	.824	417	89	442	126	22	1	27	88	51	7	110	506	231	50	0	5	0	.364	.523	.887
5	White Sox	.285	2019	114	.483	843	901	1,597	455	96	6	46	198	107	22	416	1,744	701	148	13	5	2	.337	.439	.776
6	White Sox	.284	2000	93	.688	798	362	1,012	287	60	6	35	180	120	8	166	1,160	464	101	11	8	5	.361	.458	.820
7	White Sox	.282	2009	120	.503	831	820	1,470	414	72	2	56	193	154	11	244	1,651	658	130	10	6	9	.353	.448	.800
8	White Sox	.281	1994	93	.623	860	520	1,201	338	46	9	39	179	140	5	181	1,380	519	94	21	13	11	.355	.432	.788
9	White Sox	.280	2017	122	.427	686	919	1,457	408	71	13	45	192	105	16	341	1,605	640	129	17	9	3	.333	.439	.773
10	White Sox	.279	1995	120	.467	784	896	1,485	414	79	7	44	203	180	9	257	1,711	639	130	15	22	21	.356	.430	.786
11	White Sox	.277	1982	112	.553	1,128	911	1,810	501	88	18	43	243	182	6	270	2,039	754	149	20	21	18	.341	.417	.758
12	White Sox	.275	1981	52	.520	462	426	803	221	25	8	14	85	69	3	116	888	304	47	10	3	5	.334	.379	.712
13	White Sox	.274	2003	113	.551	937	763	1,542	423	90	7	68	219	116	12	224	1,700	731	165	19	11	6	.328	.474	.802
14	White Sox	.274	1983	99	.646	1,279	702	1,768	484	100	14	51	220	167	9	291	1,981	765	165	16	21	13	.336	.433	.769
15	White Sox	.273	1989	114	.424	829	1,128	1,760	481	73	12	26	214	139	6	271	1,957	656	111	38	14	22	.326	.373	.699
16	White Sox	.271	2022	104	.511	686	657	1,212	329	68	2	40	158	113	10	271	1,343	521	110	2	6	4	.337	.430	.767
17	White Sox	.271	2005	102	.570	879	664	1,382	375	64	7	55	193	121	18	280	1,543	618	126	7	15	10	.335	.447	.782
18	White Sox	.270	1998	97	.462	686	799	1,337	361	65	4	57	185	119	7	227	1,485	605	126	9	13	3	.330	.453	.782
19	White Sox	.270	1976	107	.440	850	1,082	1,735	468	67	16	18	185	144	8	240	1,932	621	101	33	12	7	.326	.358	.684
20	White Sox	.270	2001	110	.477	619	679	1,142	308	65	10	52	182	126	7	234	1,298	549	127	13	9	5	.343	.481	.824
21	White Sox	.269	2016	106	.534	727	635	1,232	331	64	6	40	164	101	11	299	1,362	527	110	8	10	3	.327	.428	.755
22	White Sox	.268	1997	124	.485	756	804	1,400	375	56	4	43	176	128	6	227	1,560	568	103	13	13	10	.329	.406	.735
23	White Sox	.268	1985	105	.552	1,070	868	1,764	472	81	13	39	219	154	10	284	1,963	696	133	21	14	14	.327	.395	.722
24	White Sox	.266	1979	106	.421	880	1,209	1,895	505	97	12	43	220	152	11	222	2,089	755	152	19	12	9	.323	.398	.721
25	White Sox	.265	1990	122	.598	1,338	900	1,990	528	90	16	48	238	191	11	341	2,238	794	154	27	19	17	.330	.399	.729