Barry Bonds has launched the most homers by a 38-year-old player in a season, with 45 homers in 2003.

Interpreted as:

most home runs by a player in a season, at age 38

	NAME	HR	AGE	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	45	38	2003	SFG	130	390	111	133	22	1	90	148	10	58	7	0	550	292	68	0	2	61	7	.341	.529	.749	1.278	148	80.5	.503	212	79.4
2	Nelson Cruz N. Cruz	41	38	2019	MIN	120	454	81	141	26	0	108	56	7	131	0	1	520	290	67	0	3	8	14	.311	.392	.639	1.031	109	43.8	.417	164	42.7
3	Darrell Evans D. Evans	40	38	1985	DET	151	505	81	125	17	0	94	85	1	85	0	4	594	262	57	1	2	12	5	.248	.356	.519	.875	96	28.1	.378	137	26.4
4	Frank Thomas F. Thomas	39	38	2006	OAK	137	466	77	126	11	0	114	81	6	81	0	0	559	254	50	0	6	3	13	.270	.381	.545	.926	99	28.7	.392	139	28.1
5	Rafael Palmeiro R. Palmeiro	38	38	2003	TEX	154	561	92	146	21	2	112	84	5	77	2	0	654	285	61	0	4	9	7	.260	.359	.508	.867	103	22.3	.369	119	15.9
6	Ted Williams T. Williams	38	38	1957	BOS	132	420	96	163	28	1	87	119	5	43	0	1	546	307	67	0	2	33	11	.388	.526	.731	1.257	148	87.3	.524	223	79
7	David Ortiz D. Ortiz	35	38	2014	BOS	142	518	59	136	27	0	104	75	3	95	0	0	602	268	62	0	6	22	18	.263	.355	.517	.873	92	27.3	.369	134	22.6
8	Hank Aaron H. Aaron	34	38	1972	ATL	129	449	75	119	10	0	77	92	1	55	4	0	544	231	44	0	2	15	17	.265	.390	.514	.904	92	38.5	.403	148	28.5
9	Babe Ruth B. Ruth	34	38	1933	NYY	137	459	97	138	21	3	104	114	2	90	4	5	575	267	58	0				.301	.442	.582	1.023	125	58.3	.462	168	52.3
10	Rico Carty R. Carty	31	38	1978	TOT	145	528	70	149	21	1	99	57	0	57	1	1	593	265	53	1	7	7	15	.282	.348	.502	.850	90	25.8	.375	134	22.6
11	Fred McGriff F. McGriff	30	38	2002	CHC	146	523	67	143	27	2	103	63	4	99	1	2	595	264	59	0	5	6	13	.273	.353	.505	.858	91	19.8	.366	125	18.3
12	Willie Stargell W. Stargell	28	38	1978	PIT	122	390	60	115	18	2	97	50	7	93	3	2	450	221	48	0	3	10	8	.295	.382	.567	.949	82	32.9	.415	161	30.5
13	Gary Sheffield G. Sheffield	25	38	2007	DET	133	494	107	131	20	1	75	84	9	71	22	5	593	228	46	0	6	2	10	.265	.378	.462	.839	92	18.6	.368	123	16.8
14	Reggie Jackson R. Jackson	25	38	1984	CAL	143	525	67	117	17	2	81	55	3	141	8	4	584	213	44	1	0	7	10	.223	.300	.406	.706	64	-1.3	.315	94	-3.8
15	Tony Perez T. Perez	25	38	1980	BOS	151	585	73	161	31	3	105	41	1	93	1	0	635	273	59	0	8	11	25	.275	.320	.467	.786	82	10.6	.342	104	2.7
16	Craig Biggio C. Biggio	24	38	2004	HOU	156	633	100	178	47	0	63	40	15	94	7	2	700	297	71	9	3	0	8	.281	.337	.469	.806	98	10.8	.348	107	6.4
17	Carlos Santana C. Santana	23	38	2024	MIN	150	521	63	124	26	0	71	65	6	99	4	0	594	219	49	0	2	3	11	.238	.328	.420	.749	77	7.8	.326	114	9.3
18	Justin Turner J. Turner	23	38	2023	BOS	146	558	86	154	31	0	96	51	11	110	4	1	626	254	54	0	6	0	10	.276	.345	.455	.800	90	14.2	.346	114	10.9
19	Jim Thome J. Thome	23	38	2009	TOT	124	362	55	90	15	0	77	69	0	123	0	0	434	174	38	0	3	3	8	.249	.366	.481	.847	66	14.1	.368	119	10.5
20	Edgar Martinez E. Martinez	23	38	2001	SEA	132	470	80	144	40	1	116	93	9	90	4	1	581	255	64	0	9	9	11	.306	.423	.543	.966	112	39.8	.408	157	41.6
21	Ernie Banks E. Banks	23	38	1969	CHC	155	565	60	143	19	2	106	42	7	101	0	0	629	235	44	8	7	7	15	.253	.309	.416	.725	72	5.1	.324	92	-5.6
22	Steve Finley S. Finley	22	38	2003	ARI	147	516	82	148	24	10	70	57	6	94	15	8	582	258	56	0	3	4	6	.287	.363	.500	.863	92	20.3	.369	118	13.4
23	Dave Parker D. Parker	22	38	1989	OAK	144	553	56	146	27	0	97	38	1	91	0	0	600	239	49	0	8	13	21	.264	.308	.432	.741	70	4.5	.323	108	5.2
24	Frank Robinson F. Robinson	22	38	1974	TOT	144	477	81	117	27	3	68	85	10	95	5	2	579	216	52	1	6	14	11	.245	.367	.453	.820	84	21.5	.368	139	24.4
25	Sammy Sosa S. Sosa	21	38	2007	TEX	114	412	53	104	24	1	92	34	3	112	0	0	454	193	46	0	5	3	11	.252	.311	.468	.779	57	0.5	.332	96	-2