Aaron Judge trails only Alex Rodriguez for most season home runs by a Yankee righty.

Through Sunday's game Aaron Judge has 48 Home Runs in 2017. Alex Rodriguez was AL MVP for the Yankees in the two seasons in which he hit the most homers: 48 in 2005 and 54 in 2007. The only other righty Yankee to hit at least 40 homers was Joe DiMaggio: 46 in 1937.

Yankee batters have hit at least 40 home runs 31 times. Here are the tops:

Rk	Player	HR	Year	Age	Tm	Lg	G	PA	AB	R	H	2B	3B	RBI	BB	IBB	SO	HBP	SH	SF	GDP	SB	CS	BA	OBP	SLG	OPS	Pos
1	Roger Maris	61	1961	26	NYY	AL	161	698	590	132	159	16	4	141	94	0	67	7	0	7	16	0	0	.269	.372	.620	.993	*98/H
2	Babe Ruth	60	1927	32	NYY	AL	151	691	540	158	192	29	8	165	137		89	0	14			7	6	.356	.486	.772	1.258	*97
3	Babe Ruth	59	1921	26	NYY	AL	152	693	540	177	204	44	16	168	145		81	4	4			17	13	.378	.512	.846	1.359	*78/13
4	Alex Rodriguez	54	2007	31	NYY	AL	158	708	583	143	183	31	0	156	95	11	120	21	0	9	15	24	4	.314	.422	.645	1.067	*5/D
5	Mickey Mantle	54	1961	29	NYY	AL	153	646	514	131	163	16	6	128	126	9	112	0	1	5	2	12	1	.317	.448	.687	1.135	*8/H
6	Babe Ruth	54	1928	33	NYY	AL	154	684	536	163	173	29	8	146	137		87	3	8			4	5	.323	.463	.709	1.172	*97
7	Babe Ruth	54	1920	25	NYY	AL	142	616	458	158	172	36	9	135	150		80	3	5			14	14	.376	.532	.847	1.379	*978/3H1
8	Mickey Mantle	52	1956	24	NYY	AL	150	652	533	132	188	22	5	130	112	6	99	2	1	4	4	10	1	.353	.464	.705	1.169	*8/H
9	Lou Gehrig	49	1936	33	NYY	AL	155	719	579	167	205	37	7	152	130		46	7	3			3	4	.354	.478	.696	1.174	*3
10	Lou Gehrig	49	1934	31	NYY	AL	154	690	579	128	210	40	6	166	109		31	2	0			9	5	.363	.465	.706	1.172	*3/6
11	Babe Ruth	49	1930	35	NYY	AL	145	676	518	150	186	28	9	153	136		61	1	21			10	10	.359	.493	.732	1.225	*97/1
12	Aaron Judge	48	2017	25	NYY	AL	149	651	523	122	147	22	3	105	119	11	202	5	0	4	15	8	4	.281	.416	.610	1.026	*9/DH
13	Alex Rodriguez	48	2005	29	NYY	AL	162	715	605	124	194	29	1	130	91	8	139	16	0	3	8	21	6	.321	.421	.610	1.031

Babe Ruth was the first with 54 in his first Yankee season 1920. The most recent before Judge was Curtis Granderson:
2011 41
2012 43.

Jason Giambi hit 41 in each of his first two Yankee seasons, 2002 and 2003, the first Yankee to hit 40 in consecutive seasons since switch hitting Mickey Mantle in 1960 and 1961.

22 of the 31 times the Yankee had the most home runs in the league. Judge will be the first Yankee to lead in homers since Rodriguez hit 54 ten years ago in 2007.

Here's a count:
Ruth 11
Gehrig 5
Mantle 4
Giambi, Rodriguez, Granderson 2 each
DiMaggio, Maris, Jackson, Martinez, Judge 1 each.