most home runs by player age 20 in a season

Mel Ott has hit the most homers by a 20-year-old player in a season, with 42 homers in 1929.

	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	Mel Ott M. Ott	42	20	1929	NYG	150	545	138	179	37	2	151	113	6	38	6		674	346	81	10				.328	.449	.635	1.084	159	69.6	.475	162	61.5
2	Frank Robinson F. Robinson	38	20	1956	CIN	152	572	122	166	27	6	83	64	20	95	8	4	668	319	71	8	4	7	14	.290	.379	.558	.936	120	42.9	.407	145	36.4
3	Alex Rodriguez A. Rodriguez	36	20	1996	SEA	146	601	141	215	54	1	123	59	4	104	15	4	677	379	91	6	7	1	15	.358	.414	.631	1.045	149	62.1	.443	159	55.4
4	Juan Soto J. Soto	34	20	2019	WSH	150	542	110	153	32	5	110	108	3	132	12	1	659	297	71	0	6	3	11	.282	.401	.548	.949	125	42.2	.394	143	37.3
5	Tony Conigliaro T. Conigliaro	32	20	1965	BOS	138	521	82	140	21	5	82	51	5	116	4	2	586	267	58	6	3	6	9	.269	.338	.512	.850	91	29.6	.372	131	20.4
6	Ted Williams T. Williams	31	20	1939	BSA	149	565	131	185	44	11	145	107	2	64	2	1	677	344	86	3			10	.327	.436	.609	1.045	150	66.1	.464	156	53.1
7	Mike Trout M. Trout	30	20	2012	LAA	139	559	129	182	27	8	83	67	6	139	49	5	639	315	65	0	7	4	7	.326	.399	.564	.963	121	48.2	.409	167	50
8	Al Kaline A. Kaline	27	20	1955	DET	152	588	121	200	24	8	102	82	5	57	6	8	681	321	59	0	6	12	13	.340	.421	.546	.967	131	52	.423	156	47.2
9	Ronald Acuña Jr. R. Acuña Jr.	26	20	2018	ATL	111	433	78	127	26	4	64	45	6	123	16	5	487	239	56	0	3	2	4	.293	.366	.552	.917	86	28.9	.388	142	25.3
10	Orlando Cepeda O. Cepeda	25	20	1958	SFG	148	603	88	188	38	4	96	29	3	84	15	11	644	309	67	0	9	7	18	.312	.342	.512	.854	97	24.5	.369	123	18.2
11	Eddie Mathews E. Mathews	25	20	1952	BSN	145	528	80	128	23	5	58	59	1	115	6	4	593	236	53	5			9	.242	.320	.447	.767	76	11.4	.353	114	9.7
12	Bob Horner B. Horner	23	20	1978	ATL	89	323	50	86	17	1	63	24	2	42	0	0	359	174	41	1	9	2	7	.266	.313	.539	.852	53	14.4	.371	124	9.4
13	Mickey Mantle M. Mantle	23	20	1952	NYY	142	549	94	171	37	7	87	75	0	111	4	1	626	291	67	2			5	.311	.394	.530	.924	112	44.1	.421	159	43.1
14	Fernando Tatis Jr. F. Tatis Jr.	22	20	2019	SDP	84	334	61	106	13	6	53	30	5	110	16	6	372	197	41	0	3	1	4	.317	.379	.590	.969	72	25.2	.398	151	24.8
15	Carlos Correa C. Correa	22	20	2015	HOU	99	387	52	108	22	1	68	40	1	78	14	4	432	198	45	0	4	2	10	.279	.345	.512	.857	67	17.9	.365	136	17.9
16	Giancarlo Stanton G. Stanton	22	20	2010	FLA	100	359	45	93	21	1	59	34	2	123	5	2	396	182	44	0	1	6	7	.259	.326	.507	.833	57	11.1	.356	118	8.6
17	Ken Griffey Jr. K. Griffey Jr.	22	20	1990	SEA	155	597	91	179	28	7	80	63	2	81	16	11	666	287	57	0	4	12	12	.300	.366	.481	.847	102	27.3	.372	132	24.3
18	Jackson Chourio J. Chourio	21	20	2024	MIL	148	528	80	145	29	4	79	39	3	121	22	7	573	245	54	1	2	4	7	.275	.327	.464	.791	80	13.1	.339	117	11.6
19	Bryce Harper B. Harper	20	20	2013	WSH	118	424	71	116	24	3	58	61	5	94	11	4	497	206	47	3	4	4	4	.274	.368	.486	.854	77	22.1	.371	137	20.7
20	Vada Pinson V. Pinson	20	20	1959	CIN	154	648	131	205	47	9	84	55	1	98	21	6	706	330	76	2	0	3	9	.316	.371	.509	.880	118	37.5	.386	130	26.3
21	Willie Mays W. Mays	20	20	1951	NYG	121	464	59	127	22	5	68	57	2	60	7	4	524	219	47	1			11	.274	.356	.472	.828	78	16.8	.378	120	12.9
22	Jason Heyward J. Heyward	18	20	2010	ATL	142	520	83	144	29	5	72	91	10	128	11	6	623	237	52	0	2	2	13	.277	.393	.456	.849	100	28	.377	133	24.9
23	Andruw Jones A. Jones	18	20	1997	ATL	153	399	60	92	18	1	70	56	4	107	20	11	467	166	37	5	3	2	11	.231	.329	.416	.745	56	-1.1	.329	96	-2.3
24	Ruben Sierra R. Sierra	16	20	1986	TEX	113	382	50	101	13	10	55	22	1	65	7	8	411	182	39	1	5	3	8	.264	.302	.476	.779	52	4.8	.335	103	1.5
25	Vladimir Guerrero Jr. V. Guerrero Jr.	15	20	2019	TOR	123	464	52	126	26	2	69	46	2	91	0	1	514	201	43	0	2	0	17	.272	.339	.433	.772	69	4.1	.329	106	3.7