Mark McGwire has crushed the most career homers by a 23-year-old player, with 49 homers.

	NAME	HR	G	AB	R	H	2B	3B	RBI	BB	HBP	SO	SB	CS	PA	TB	XBH	SH	SF	IBB	GIDP	AVG	OBP	SLG	OPS
1	Mark McGwire M. McGwire	49	149	546	95	159	27	4	117	70	5	130	1	1	629	341	80	0	8	7	6	.291	.372	.625	.997
2	Juan Gonzalez J. Gonzalez	46	140	536	105	166	33	1	118	37	13	99	4	1	587	339	80	0	1	7	12	.310	.368	.632	1.000
3	Ken Griffey Jr. K. Griffey Jr.	45	156	582	113	180	38	3	109	96	6	91	17	9	691	359	86	0	7	25	14	.309	.408	.617	1.025
4	Prince Fielder P. Fielder	44	158	561	103	157	35	2	110	94	15	114	2	0	678	328	81	0	8	21	11	.280	.392	.585	.977
5	Hank Aaron H. Aaron	44	151	615	118	198	27	6	132	57	0	58	1	1	675	369	77	0	3	15	14	.322	.378	.600	.978
6	Mike Trout M. Trout	43	152	564	113	162	25	6	98	73	13	166	14	6	655	328	74	0	5	16	10	.287	.379	.582	.960
7	Albert Pujols A. Pujols	43	157	591	137	212	51	1	124	79	10	65	5	1	685	394	95	0	5	12	13	.359	.439	.667	1.106
8	Troy Glaus T. Glaus	43	163	571	105	149	29	1	100	105	3	164	11	8	681	309	73	0	2	5	9	.261	.377	.541	.919
9	Hal Trosky Sr. H. Trosky Sr.	42	151	629	124	216	45	9	163	36	3	59	6		671	405	96	3				.343	.382	.644	1.026
10	Joey Gallo J. Gallo	41	145	449	85	94	18	3	80	75	8	196	7	2	532	241	62	0	0	1	3	.209	.333	.537	.869
11	Reggie Jackson R. Jackson	41	155	564	106	148	38	3	113	108	14	146	16	6	690	315	82	2	2	20	10	.262	.392	.559	.951
12	Eddie Mathews E. Mathews	41	141	499	108	144	23	5	101	109	1	98	3	4	616	300	69	1	6	20	5	.289	.413	.601	1.014
13	Willie Mays W. Mays	41	150	559	128	196	33	13	111	73	3	59	9	5	641	378	87	0	6	1	13	.351	.424	.676	1.101
14	Orlando Cepeda O. Cepeda	40	152	582	96	173	28	4	131	39	10	94	12	11	634	329	72	0	3	11	20	.297	.350	.565	.915
15	Cody Bellinger C. Bellinger	38	159	546	98	173	26	5	104	84	4	118	17	6	638	323	69	0	4	20	6	.317	.409	.592	1.001
16	Vladimir Guerrero V. Guerrero	38	159	623	108	202	37	7	109	42	7	95	11	9	677	367	82	0	5	13	15	.324	.371	.589	.960
17	Mel Ott M. Ott	38	154	566	119	180	30	8	123	100	4	39	6		673	340	76	3				.318	.424	.601	1.025
18	Manny Machado M. Machado	37	159	639	109	191	41	0	93	68	6	116	7	9	715	343	78	0	2	9	12	.299	.371	.537	.907
19	Jose Canseco J. Canseco	37	162	638	110	173	34	2	125	73	5	143	29	9	724	322	73	1	7	4	14	.271	.347	.505	.852
20	Frank Robinson F. Robinson	37	154	578	110	176	35	5	134	73	8	100	17	5	667	332	77	0	8	9	17	.304	.385	.574	.960
21	Mickey Mantle M. Mantle	37	147	517	121	158	25	11	99	113	3	98	8	2	638	316	73	2	3	6	4	.306	.431	.611	1.042
22	Andruw Jones A. Jones	36	163	667	124	201	37	6	102	58	8	101	20	4	737	358	79	0	4	1	10	.301	.362	.537	.899
23	Franmil Reyes F. Reyes	35	142	443	62	121	13	0	65	41	0	120	0	0	488	239	48	0	4	1	14	.273	.332	.540	.871
24	Will Clark W. Clark	35	150	529	89	163	29	5	91	49	5	98	5	17	588	307	69	3	2	11	2	.308	.371	.580	.951
25	Ted Williams T. Williams	35	153	524	135	183	37	6	137	154	4	50	2		682	337	78	0			10	.349	.500	.643	1.143