Barry Bonds has launched the most homers by a left fielder in a season, with 73 homers in 2001.

	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	Barry Bonds B. Bonds	73	2001	SFG	153	476	129	156	32	2	137	177	9	93	13	3	664	411	107	0	2	35	5	.328	.515	.863	1.379	200	117.7	.537	234	116.6
2	Babe Ruth B. Ruth	59	1921	NYY	152	540	177	204	44	16	168	145	4	81	17	13	693	457	119	4				.378	.512	.846	1.359	214	127.8	.575	224	118.7
3	Luis Gonzalez L. Gonzalez	57	2001	ARI	162	609	128	198	36	7	142	100	14	83	1	1	728	419	100	0	5	24	14	.325	.429	.688	1.117	168	77.8	.454	173	69.4
4	Ralph Kiner R. Kiner	54	1949	PIT	152	549	116	170	19	5	127	117	1	61	6		667	361	78	0			10	.310	.432	.658	1.089	153	73.4	.484	179	65.8
5	George Foster G. Foster	52	1977	CIN	158	615	124	197	31	2	149	61	5	107	6	4	689	388	85	0	8	10	17	.320	.382	.631	1.013	139	58.4	.430	165	54.1
6	Ralph Kiner R. Kiner	51	1947	PIT	152	565	118	177	23	4	127	98	2	81	1		666	361	78	1			12	.313	.417	.639	1.055	145	69.5	.472	169	58.2
7	Greg Vaughn G. Vaughn	50	1998	SDP	158	573	112	156	28	4	119	79	5	121	11	4	661	342	82	0	4	6	7	.272	.363	.597	.960	121	39.6	.403	151	42.7
8	Albert Belle A. Belle	50	1995	CLE	143	546	121	173	52	1	126	73	6	80	5	2	629	377	103	0	4	5	24	.317	.401	.690	1.091	143	64.3	.456	173	59.9
9	Barry Bonds B. Bonds	49	2000	SFG	143	480	129	147	28	4	106	117	3	77	11	3	607	330	81	0	7	22	6	.306	.440	.688	1.127	141	61	.456	174	61.2
10	Albert Belle A. Belle	49	1998	CWS	163	609	113	200	48	2	152	81	1	84	6	4	706	399	99	0	15	10	17	.328	.399	.655	1.055	150	62.1	.437	165	59.7
11	Harmon Killebrew H. Killebrew	49	1964	MIN	158	577	95	156	11	1	111	93	8	135	0	0	682	316	61	0	4	5	15	.270	.377	.548	.924	123	49.9	.404	152	41.6
12	Albert Belle A. Belle	48	1996	CLE	158	602	124	187	38	3	148	99	7	87	11	0	715	375	89	0	7	15	20	.311	.410	.623	1.033	150	57.7	.430	150	49.7
13	Dave Kingman D. Kingman	48	1979	CHC	145	532	97	153	19	5	115	45	4	131	4	2	589	326	72	0	8	7	7	.288	.343	.613	.956	107	38.3	.406	144	30.7
14	Willie Stargell W. Stargell	48	1971	PIT	141	511	104	151	26	0	125	83	7	154	0	0	606	321	74	0	5	20	8	.295	.398	.628	1.026	122	59.7	.445	186	57.3
15	Frank Howard F. Howard	48	1969	WSH	161	592	111	175	17	2	111	102	5	96	1	0	702	340	67	0	3	19	29	.296	.402	.574	.976	135	59.6	.427	169	55.9
16	Harmon Killebrew H. Killebrew	48	1962	MIN	155	552	85	134	21	1	126	106	4	142	1	2	666	301	70	0	4	6	14	.243	.366	.545	.912	116	38.8	.395	138	31.6
17	Kyle Schwarber K. Schwarber	47	2023	PHI	160	585	108	115	19	1	104	126	6	215	0	2	720	277	67	0	3	5	4	.197	.343	.474	.817	107	19	.350	120	17.5
18	Kevin Mitchell K. Mitchell	47	1989	SFG	154	543	100	158	34	6	125	87	3	115	3	4	640	345	87	0	7	32	6	.291	.388	.635	1.023	126	56.8	.431	185	59.2
19	George Bell G. Bell	47	1987	TOR	156	610	111	188	32	4	134	39	7	75	5	1	665	369	83	0	9	9	17	.308	.352	.605	.957	122	40.2	.399	143	36.4
20	Ralph Kiner R. Kiner	47	1950	PIT	150	547	112	149	21	6	118	122	3	79	2		672	323	74	0			22	.272	.408	.590	.998	136	52	.441	152	44.9
21	Babe Ruth B. Ruth	47	1926	NYY	152	495	139	184	30	5	153	144	3	76	11	9	652	365	82	10				.372	.516	.737	1.253	184	105.6	.551	216	100.6
22	Kyle Schwarber K. Schwarber	46	2022	PHI	155	577	100	126	21	3	94	86	4	200	10	1	669	291	70	0	2	3	10	.218	.323	.504	.827	100	23.8	.355	129	22.6
23	Alfonso Soriano A. Soriano	46	2006	WSH	159	647	119	179	41	2	95	67	9	160	41	17	728	362	89	2	3	16	3	.277	.351	.560	.911	119	28.1	.377	129	27.9
24	Adam Dunn A. Dunn	46	2004	CIN	161	568	105	151	34	0	102	108	5	195	6	1	681	323	80	0	0	11	8	.266	.388	.569	.956	126	41.2	.402	142	37
25	Barry Bonds B. Bonds	46	2002	SFG	143	403	117	149	31	2	110	198	9	47	9	2	612	322	79	0	2	68	4	.370	.582	.799	1.381	183	110	.544	244	109.9