Mark McGwire has crushed the most career homers by a 34-year-old player, with 70 homers.

Interpreted as:

most career home runs by a player by age 34

	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	70	155	509	130	152	21	0	147	162	6	155	1	0	681	383	91	0	4	28	8	.299	.470	.752	1.222
2	Willie Mays W. Mays	51	157	548	114	169	21	2	112	78	0	77	9	3	629	347	74	1	2	15	11	.308	.393	.633	1.027
3	Johnny Mize J. Mize	51	154	586	137	177	26	2	138	74	4	42	2		664	360	79	0			6	.302	.384	.614	.998
4	Jose Canseco J. Canseco	50	148	583	104	153	29	1	123	61	8	175	10	8	659	334	80	0	7	7	10	.262	.337	.573	.910
5	Babe Ruth B. Ruth	46	135	498	121	172	26	6	154	72	3	60	5		587	348	78	14				.345	.431	.699	1.130
6	Rafael Palmeiro R. Palmeiro	45	152	546	92	181	30	1	142	91	3	68	2	2	649	348	76	0	9	12	12	.332	.424	.637	1.061
7	Paul Goldschmidt P. Goldschmidt	42	154	574	125	189	45	0	126	83	6	137	7	0	667	360	87	0	4	2	9	.329	.417	.627	1.044
8	Jim Edmonds J. Edmonds	41	144	455	100	142	33	3	110	100	3	140	8	5	565	304	77	0	7	9	1	.312	.434	.668	1.102
9	Greg Vaughn G. Vaughn	41	140	502	97	141	25	1	109	81	1	139	8	1	587	291	67	0	3	2	7	.281	.380	.580	.960
10	Andres Galarraga A. Galarraga	41	160	611	103	178	36	3	139	38	20	159	13	3	680	343	80	0	11	6	13	.291	.347	.561	.908
11	Jose Bautista J. Bautista	40	153	543	108	136	29	3	114	110	5	106	8	2	666	291	72	0	8	2	19	.250	.377	.536	.913
12	Sammy Sosa S. Sosa	40	137	517	99	144	22	0	103	62	5	143	0	1	589	286	62	0	5	9	14	.279	.358	.553	.911
13	Paul Konerko P. Konerko	39	149	548	89	171	30	1	111	72	5	110	0	1	631	320	70	0	6	7	9	.312	.393	.584	.977
14	Gary Sheffield G. Sheffield	39	155	576	126	190	37	2	132	86	8	55	18	4	678	348	78	0	8	6	16	.330	.419	.604	1.023
15	David Justice D. Justice	39	147	532	86	154	32	1	121	74	1	95	2	1	610	305	72	0	3	3	13	.289	.375	.573	.949
16	Edwin Encarnacion E. Encarnacion	38	157	554	96	143	20	1	107	104	5	133	2	0	668	279	59	0	5	5	18	.258	.377	.504	.881
17	Larry Walker L. Walker	38	142	497	107	174	35	3	123	82	14	103	14	5	601	329	76	0	8	6	9	.350	.449	.662	1.111
18	Reggie Jackson R. Jackson	38	145	510	84	147	24	5	113	90	2	131	1	1	605	295	67	0	3	14	8	.288	.395	.578	.973
19	Billy Williams B. Williams	38	159	586	98	199	36	4	134	75	7	66	2	1	679	357	78	0	11	22	12	.340	.414	.609	1.023
20	Tilly Walker T. Walker	38	152	559	112	155	30	5	112	68	4	62	3		643	309	73	12				.277	.360	.553	.913
21	Jeff Kent J. Kent	37	152	623	102	195	42	2	108	52	4	101	5	1	682	352	81	0	3	3	20	.313	.368	.565	.933
22	Moises Alou M. Alou	37	141	540	101	195	34	2	136	53	1	52	2	1	603	344	73	0	9	6	24	.361	.413	.637	1.050
23	Dave Parker D. Parker	37	159	634	91	197	38	3	124	53	3	107	2	10	693	352	78	0	3	24	25	.311	.365	.555	.920
24	Mike Schmidt M. Schmidt	36	150	525	94	147	23	4	107	93	4	114	5	7	630	286	63	0	8	14	15	.280	.387	.545	.932
25	Lou Gehrig L. Gehrig	36	158	554	136	174	29	8	148	136	6	58	4		696	327	73	0				.314	.454	.590	1.044