who has hit the most home runs off a left handed pitcher in single season

Brooks Kieschnick, Don Newcombe and Bob Lemon are tied for the most home runs by a left-handed pitcher in a season, with 7 home runs.

	NAME	HR	SEASON	TM	G	AB	R	H	2B	3B	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS	WRC	WRAA	WOBA	WRC+	BRAA
1	Brooks Kieschnick B. Kieschnick	7	2003	MIL	69	70	12	21	1	0	12	6	0	13	0	0	76	43	8	0	0	0	2	.300	.355	.614	.970	14	5.2	.409	148	4.7
2	Don Newcombe D. Newcombe	7	1955	BKN	57	117	18	42	9	1	23	6	1	18	1	0	125	74	17	1	0	0	1	.359	.395	.632	1.028	27	12.2	.450	167	10.5
3	Bob Lemon B. Lemon	7	1949	CLE	46	108	17	29	6	2	19	10	0	20	0	0	123	60	15	5			1	.269	.331	.556	.886	20	5.1	.397	128	4.5
4	Jack Harshman J. Harshman	6	1958	BAL	47	82	11	16	1	0	14	17	0	22	0	0	101	35	7	1	1	0	2	.195	.330	.427	.757	13	1.6	.340	115	1.8
5	Jack Harshman J. Harshman	6	1956	CWS	36	71	8	12	1	0	19	11	0	21	0	0	87	31	7	4	1	0	0	.169	.277	.437	.714	9	-0.7	.316	86	-1.6
6	Bob Lemon B. Lemon	6	1950	CLE	72	136	21	37	9	1	26	13	1	25	0	0	153	66	16	3			0	.272	.340	.485	.825	22	3.1	.371	110	2.2
7	Bob Lemon B. Lemon	5	1956	CLE	43	93	8	18	0	0	12	9	1	21	0	0	110	33	5	7	0	0	1	.194	.272	.355	.627	9	-3.5	.285	66	-4.8
8	Bob Lemon B. Lemon	5	1948	CLE	52	119	20	34	9	0	21	8	0	23	0	0	129	58	14	2			0	.286	.331	.487	.818	18	3.2	.373	116	2.7
9	Art Nehf A. Nehf	5	1924	NYG	33	57	11	13	1	0	13	6	0	4	1	0	67	29	6	4				.228	.302	.509	.810	9	0.9	.364	112	1
10	Pink Hawley P. Hawley	5	1895	PIT	57	185	33	57	14	3	42	3	2	20	1		193	92	22	3				.308	.326	.497	.824	33	1.1	.367	101	0.5
11	Jim Whitney J. Whitney	5	1883	BSN	96	409	78	115	27	10	57	25		29			434	177	42					.281		.433		83	18	.337	121	14.8
12	Jim Whitney J. Whitney	5	1882	BOS	61	251	49	81	18	7	48	24		13			275	128	30					.323		.510		65	26	.399	162	25.3
13	Ken Brett K. Brett	4	1973	PHI	37	80	6	20	5	0	16	4	0	17	0	0	85	37	9	0	1	0	0	.250	.282	.463	.745	10	0.8	.330	101	0.1
14	Gary Peters G. Peters	4	1964	CWS	54	120	9	25	7	0	19	2	1	29	0	0	126	44	11	3	0	0	4	.208	.228	.367	.594	9	-4.2	.263	67	-4.8
15	Dick Donovan D. Donovan	4	1962	CLE	34	89	8	16	1	0	9	7	2	32	0	0	100	29	5	2	0	0	1	.180	.255	.326	.581	7	-4.4	.266	59	-5.1
16	Warren Spahn W. Spahn	4	1961	MIL	39	94	13	21	7	0	15	7	1	33	0	0	106	40	11	2	2	0	1	.223	.279	.426	.704	11	-1.4	.308	88	-1.6
17	Mickey McDermott M. McDermott	4	1957	KCA	58	49	6	12	1	0	7	9	0	16	0	0	58	25	5	0	0	2	2	.245	.362	.510	.872	9	2.5	.375	128	1.9
18	Johnny Antonelli J. Antonelli	4	1955	NYG	38	82	8	17	1	0	15	3	0	18	0	0	90	30	5	3	2	0	1	.207	.230	.366	.596	6	-4.6	.262	52	-5.4
19	Warren Spahn W. Spahn	4	1955	MIL	40	81	7	17	1	1	14	4	0	20	0	0	88	32	6	3	0	0	1	.210	.247	.395	.642	7	-2.9	.285	74	-2.8
20	Thornton Lee T. Lee	4	1938	CWS	34	97	14	25	3	1	16	0	0	23	0	0	101	42	8	4				.258	.258	.433	.691	10	-3	.306	65	-5.2
21	Lynn Nelson L. Nelson	4	1937	PHA	74	113	18	40	6	2	29	6	0	13	1	0	120	62	12	1				.354	.387	.549	.935	22	7.4	.419	129	4.9
22	Lefty Grove L. Grove	4	1932	PHA	44	107	10	18	1	0	12	5	0	51	0	0	116	31	5	4				.168	.205	.290	.495	4	-10.6	.225	24	-12.2
23	Pat Malone P. Malone	4	1930	CHC	45	105	12	26	0	0	10	7	0	19	0		116	38	4	4				.248	.295	.362	.657	10	-6.1	.297	58	-7.7
24	Erv Brame E. Brame	4	1929	PIT	59	116	9	36	8	1	25	2	0	7	0		120	58	13	2				.310	.322	.500	.822	17	1	.363	95	-0.9
25	Ray Caldwell R. Caldwell	4	1915	NYY	72	144	27	35	4	1	20	9	0	32	4	3	155	53	9	2				.243	.288	.368	.656	16	-0.1	.317	92	-1.3