Alex Rodriguez has smashed the most career homers by a player younger than 33, with 539 homers.

Interpreted as:

most homeruns by a player before age 33

	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	Alex Rodriguez A. Rodriguez	539	1,987	7,659	1,562	2,350	416	26	1,565	953	133	1,588	280	65	8,838	4,435	981	16	77	77	177	.307	.389	.579	.969
2	Jimmie Foxx J. Foxx	500	1,978	7,098	1,591	2,369	407	116	1,746	1,298	11	1,094	84		8,476	4,508	1,023	69			35	.334	.437	.635	1.073
3	Albert Pujols A. Pujols	475	1,859	6,919	1,376	2,246	505	15	1,434	1,027	82	780	92	36	8,103	4,206	995	1	74	267	251	.325	.414	.608	1.022
4	Ken Griffey Jr. K. Griffey Jr.	468	1,861	6,913	1,237	2,039	370	35	1,358	913	63	1,212	176	66	7,968	3,883	873	7	72	199	130	.295	.379	.562	.940
5	Mickey Mantle M. Mantle	454	1,883	6,532	1,471	2,016	289	69	1,298	1,390	10	1,352	140	37	7,979	3,805	812	13	34	100	76	.309	.429	.583	1.011
6	Sammy Sosa S. Sosa	450	1,725	6,470	1,093	1,795	278	41	1,239	635	44	1,690	231	105	7,224	3,505	769	17	58	120	139	.277	.343	.542	.885
7	Eddie Mathews E. Mathews	445	1,933	7,051	1,303	1,951	294	66	1,241	1,239	20	1,198	65	36	8,389	3,712	805	31	48	81	104	.277	.384	.526	.911
8	Hank Aaron H. Aaron	442	1,964	7,683	1,407	2,434	414	81	1,432	739	22	830	170	48	8,543	4,336	937	19	80	158	209	.317	.375	.564	.939
9	Frank Robinson F. Robinson	416	1,892	6,927	1,306	2,094	396	60	1,268	911	145	1,033	178	68	8,064	3,858	872	13	68	157	187	.302	.391	.557	.948
10	Willie Mays W. Mays	416	1,706	6,520	1,278	2,062	335	107	1,204	797	26	752	251	76	7,402	3,859	858	1	58	112	155	.316	.390	.592	.982
11	Babe Ruth B. Ruth	416	1,502	4,961	1,282	1,731	341	98	1,261	1,220	30	833	92		6,284	3,516	855	73				.349	.480	.709	1.189
12	Harmon Killebrew H. Killebrew	415	1,604	5,490	927	1,438	200	19	1,074	997	41	1,200	11	11	6,576	2,921	634	0	48	91	141	.262	.377	.532	.909
13	Mel Ott M. Ott	415	2,163	7,604	1,510	2,366	415	66	1,558	1,341	47	684	73		9,089	4,158	896	97			16	.311	.417	.547	.964
14	Miguel Cabrera M. Cabrera	409	1,949	7,300	1,236	2,342	494	16	1,449	943	53	1,409	38	20	8,371	4,095	919	5	70	207	255	.321	.399	.561	.960
15	Adam Dunn A. Dunn	406	1,721	5,929	988	1,422	301	10	1,018	1,170	76	2,031	61	23	7,210	2,961	717	2	33	110	93	.240	.370	.499	.870
16	Juan Gonzalez J. Gonzalez	405	1,573	6,101	995	1,805	367	23	1,317	434	57	1,181	25	17	6,670	3,433	795	2	76	72	171	.296	.344	.563	.907
17	Manny Ramirez M. Ramirez	401	1,583	5,746	1,095	1,804	390	15	1,310	899	71	1,270	34	30	6,781	3,427	806	2	63	129	165	.314	.409	.596	1.006
18	Lou Gehrig L. Gehrig	394	1,744	6,472	1,538	2,229	441	146	1,622	1,183	34	631	90		7,791	4,144	981	102				.344	.448	.640	1.088
19	Andruw Jones A. Jones	392	1,930	6,935	1,115	1,786	357	35	1,181	795	87	1,555	145	57	7,889	3,389	784	6	66	68	173	.258	.338	.489	.827
20	Mike Trout M. Trout	378	1,518	5,510	1,123	1,648	311	54	954	980	100	1,484	212	38	6,645	3,201	743	0	55	120	68	.299	.411	.581	.991
21	Giancarlo Stanton G. Stanton	378	1,434	5,237	815	1,383	272	11	971	697	49	1,696	42	15	6,019	2,811	661	0	36	83	125	.264	.354	.537	.890
22	Jim Thome J. Thome	370	1,505	5,110	1,002	1,457	285	22	1,027	1,090	45	1,522	18	17	6,294	2,896	677	1	48	95	91	.285	.412	.567	.979
23	Ralph Kiner R. Kiner	369	1,472	5,205	971	1,451	216	39	1,014	1,011	24	754	22	4	6,256	2,852	624	9	7	1	128	.279	.398	.548	.946
24	Vladimir Guerrero V. Guerrero	365	1,607	6,076	1,041	1,972	373	40	1,177	615	79	736	168	83	6,819	3,520	778	0	49	223	192	.325	.391	.579	.970
25	Bryce Harper B. Harper	363	1,785	6,435	1,154	1,801	401	24	1,051	1,105	52	1,654	152	52	7,665	3,339	788	13	60	137	139	.280	.387	.519	.905