Alex Rodriguez has hit the most homers by a 31-year-old player in a season, with 54 homers in 2007.

Interpreted as:

most home runs by a player by age 31 season

	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	Alex Rodriguez A. Rodriguez	54	31	2007	NYY	158	583	143	183	31	0	156	95	21	120	24	4	708	376	85	0	9	11	15	.314	.422	.645	1.067	155	67.5	.445	175	66.2
2	Jim Thome J. Thome	52	31	2002	CLE	147	480	101	146	19	2	118	122	5	139	1	2	613	325	73	0	6	18	5	.304	.445	.677	1.122	142	68.3	.461	189	67.1
3	Sammy Sosa S. Sosa	50	31	2000	CHC	156	604	106	193	38	1	138	91	2	168	7	4	705	383	89	0	8	19	12	.320	.406	.634	1.040	146	53.4	.428	154	51.8
4	Albert Belle A. Belle	49	31	1998	CWS	163	609	113	200	48	2	152	81	1	84	6	4	706	399	99	0	15	10	17	.328	.399	.655	1.055	150	62.1	.437	165	59.7
5	Willie Mays W. Mays	49	31	1962	SFG	162	621	130	189	36	5	141	78	4	85	18	2	706	382	90	0	3	11	19	.304	.384	.615	.999	141	59.1	.428	163	55.4
6	Lou Gehrig L. Gehrig	49	31	1934	NYY	154	579	128	210	40	6	166	109	2	31	9	5	690	409	95	0				.363	.465	.706	1.172	182	94.8	.511	194	90.9
7	Salvador Perez S. Perez	48	31	2021	KCR	161	620	88	169	24	0	121	28	13	170	1	0	665	337	72	0	4	4	14	.273	.316	.544	.859	105	24.6	.359	125	20.4
8	Willie Stargell W. Stargell	48	31	1971	PIT	141	511	104	151	26	0	125	83	7	154	0	0	606	321	74	0	5	20	8	.295	.398	.628	1.026	122	59.7	.445	186	57.3
9	Babe Ruth B. Ruth	47	31	1926	NYY	152	495	139	184	30	5	153	144	3	76	11	9	652	365	82	10				.372	.516	.737	1.253	184	105.6	.551	216	100.6
10	Willie McCovey W. McCovey	45	31	1969	SFG	149	491	101	157	26	2	126	121	4	66	0	0	623	322	73	0	7	45	11	.320	.453	.656	1.108	138	71	.466	194	67
11	Jay Buhner J. Buhner	44	31	1996	SEA	150	564	107	153	29	0	138	84	9	159	0	1	667	314	73	0	10	5	11	.271	.369	.557	.926	118	31.6	.391	127	25
12	Dale Murphy D. Murphy	44	31	1987	ATL	159	566	115	167	27	1	105	115	7	136	16	6	693	328	72	0	5	29	11	.295	.417	.580	.997	136	50.9	.414	150	43.4
13	Frank Howard F. Howard	44	31	1968	WSH	158	598	79	164	28	3	106	54	6	141	0	0	663	330	75	0	5	12	13	.274	.338	.552	.890	109	48.5	.398	170	45.9
14	Harmon Killebrew H. Killebrew	44	31	1967	MIN	163	547	105	147	24	1	113	131	3	111	1	0	689	305	69	0	8	15	16	.269	.408	.558	.965	130	61	.422	176	54.8
15	Curtis Granderson C. Granderson	43	31	2012	NYY	160	596	102	138	18	4	106	75	5	195	10	3	684	293	65	1	7	4	5	.232	.319	.492	.811	95	16.8	.346	116	12.5
16	Josh Hamilton J. Hamilton	43	31	2012	TEX	148	562	103	160	31	2	128	60	5	162	7	4	636	324	76	0	9	13	9	.285	.354	.577	.930	109	36.6	.387	141	30.5
17	Gary Sheffield G. Sheffield	43	31	2000	LAD	141	501	105	163	24	3	109	101	4	71	4	6	612	322	70	0	6	7	13	.325	.438	.643	1.081	139	58.8	.451	174	61.5
18	Tony Armas T. Armas	43	31	1984	BOS	157	639	107	171	29	5	123	32	1	156	1	3	679	339	77	0	7	9	13	.268	.300	.531	.831	97	21.4	.359	119	14.7
19	Carlos Delgado C. Delgado	42	31	2003	TOR	161	570	117	172	38	1	145	109	19	137	0	0	705	338	81	0	7	23	9	.302	.426	.593	1.019	143	56.5	.423	159	52.1
20	Jeff Bagwell J. Bagwell	42	31	1999	HOU	162	562	143	171	35	0	126	149	11	127	30	11	729	332	77	0	7	16	18	.304	.454	.591	1.045	159	63.9	.442	166	65.7
21	Barry Bonds B. Bonds	42	31	1996	SFG	158	517	122	159	27	3	129	151	1	76	40	7	675	318	72	0	6	30	11	.308	.461	.615	1.076	151	63.7	.446	179	67.8
22	Jason Giambi J. Giambi	41	31	2002	NYY	155	560	120	176	34	1	122	109	15	112	2	2	689	335	76	0	5	4	18	.314	.435	.598	1.034	148	64.8	.440	175	63.6
23	Ben Oglivie B. Oglivie	41	31	1980	MIL	156	592	94	180	26	2	118	54	5	71	11	9	660	333	69	0	9	19	5	.304	.362	.563	.925	113	38.8	.396	147	36.5
24	Roy Campanella R. Campanella	41	31	1953	BKN	144	519	103	162	26	3	142	67	4	58	4	2	590	317	70	0			13	.312	.395	.611	1.006	120	49.8	.441	154	41.8
25	Ellis Burks E. Burks	40	31	1996	COL	156	613	142	211	45	8	128	61	6	114	32	6	685	392	93	3	2	2	19	.344	.408	.639	1.047	151	62.8	.443	151	44.1