Eddie Mathews has smashed the most career homers by a 21-year-old player, with 47 home runs.

Interpreted as:

most home runs by a player ever by a 21 year old

	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	Eddie Mathews E. Mathews	47	157	579	110	175	31	8	135	99	2	83	1	3	681	363	86	1			6	.302	.406	.627	1.033
2	Ronald Acuña Jr. R. Acuña Jr.	41	156	626	127	175	22	2	101	76	9	188	37	9	712	324	65	0	1	4	8	.280	.365	.518	.883
3	Albert Pujols A. Pujols	37	161	590	112	194	47	4	130	69	9	93	1	3	676	360	88	1	7	6	21	.329	.403	.610	1.013
4	Hal Trosky Sr. H. Trosky Sr.	35	154	625	117	206	45	9	142	58	2	49	2		685	374	89	0				.330	.388	.598	.987
5	Giancarlo Stanton G. Stanton	34	150	516	79	135	30	5	87	70	9	166	5	5	601	277	69	0	6	6	11	.262	.356	.537	.893
6	Bob Horner B. Horner	33	118	453	66	136	18	1	97	27	5	75	0	1	493	255	52	0	8	7	6	.300	.341	.563	.904
7	Jimmie Foxx J. Foxx	33	149	517	123	183	23	9	118	103	2	70	9		638	323	65	16				.354	.463	.625	1.088
8	Mike Trout M. Trout	30	163	638	122	202	38	11	92	97	8	144	37	6	750	352	79	0	7	7	12	.317	.409	.552	.961
9	Miguel Cabrera M. Cabrera	30	161	607	96	174	30	1	115	70	6	149	5	2	693	296	61	0	10	5	22	.287	.361	.488	.848
10	Alex Rodriguez A. Rodriguez	30	149	625	122	209	47	3	100	53	5	94	29	4	691	352	80	3	5	2	15	.334	.388	.563	.951
11	Ruben Sierra R. Sierra	30	158	643	97	169	35	4	109	39	2	114	16	11	696	302	69	0	12	4	18	.263	.302	.470	.771
12	Andruw Jones A. Jones	29	154	565	89	157	31	8	91	47	4	123	26	5	622	291	68	1	5	8	11	.278	.335	.515	.850
13	Joe DiMaggio J. DiMaggio	29	138	637	132	206	44	15	125	25	4	39	4		669	367	88	3				.323	.353	.576	.929
14	Julio Rodríguez J. Rodríguez	28	132	511	84	145	25	3	75	40	8	145	25	7	560	260	56	0	1	4	7	.284	.345	.509	.853
15	Tony Conigliaro T. Conigliaro	28	150	558	77	148	26	7	93	52	5	112	0	2	628	272	61	6	7	8	6	.265	.330	.487	.817
16	Ted Williams T. Williams	28	145	544	151	192	47	12	116	112	5	55	3		664	347	87	3			10	.353	.467	.638	1.105
17	Junior Caminero J. Caminero	27	125	486	67	125	28	1	72	32	2	102	7	1	523	236	56	0	3	3	25	.257	.304	.486	.790
18	Juan Gonzalez J. Gonzalez	27	142	545	78	144	34	1	102	42	5	118	4	4	595	261	62	0	3	7	10	.264	.321	.479	.800
19	Eddie Murray E. Murray	27	160	611	81	173	29	2	88	48	1	104	0	1	666	287	58	0	6	6	22	.283	.333	.470	.803
20	Al Kaline A. Kaline	27	153	617	96	194	32	10	128	70	1	55	7	1	693	327	69	1	4	4	12	.314	.383	.530	.913
21	Hank Aaron H. Aaron	27	153	602	106	189	37	9	106	49	3	61	3	1	665	325	73	7	4	5	21	.314	.366	.540	.906
22	Jackson Merrill J. Merrill	26	145	525	72	154	31	5	92	24	1	96	13	3	560	273	62	4	6	0	3	.293	.322	.520	.842
23	Darryl Strawberry D. Strawberry	26	122	420	63	108	15	7	74	47	4	128	19	6	473	215	48	0	2	9	5	.257	.336	.512	.848
24	Johnny Bench J. Bench	26	148	532	83	156	23	1	90	49	4	86	6	6	592	259	50	0	7	7	7	.293	.353	.487	.840
25	Orlando Cepeda O. Cepeda	26	150	604	96	191	39	4	101	33	4	95	26	8	646	316	69	0	5	10	11	.316	.353	.523	.876