most home runs in the first inning by a player in a single season

Aaron Judge and Alex Rodriguez are tied for the most homers in the 1st inning in a season, with 18 homers.

	NAME	HR	SEASON	TM	G	AB	H	2B	3B	RBI	BB	HBP	SO	PA	TB	XBH	SH	SF	IBB	AVG	OBP	SLG	OPS
1	Aaron Judge A. Judge	18	2024	NYY	158	128	46	7	0	35	26	2	44	158	107	25	0	1	0	.359	.471	.836	1.307
2	Alex Rodriguez A. Rodriguez	18	2001	TEX	162	143	53	10	0	40	15	3	38	162	117	28	0	1	0	.371	.438	.818	1.256
3	Mark McGwire M. McGwire	17	1999	STL	150	128	32	6	0	34	20	1	37	150	89	23	0	1	0	.250	.353	.695	1.049
4	Sammy Sosa S. Sosa	16	2001	CHC	154	126	38	7	0	34	25	1	34	154	93	23	0	2	0	.302	.416	.738	1.154
5	Kyle Schwarber K. Schwarber	15	2024	PHI	149	129	35	2	0	15	20	1	35	150	82	17	0	0	0	.271	.373	.636	1.009
6	Eugenio Suárez E. Suárez	15	2019	CIN	144	129	44	4	1	27	14	1	43	144	95	20	0	0	0	.341	.410	.736	1.146
7	Josh Donaldson J. Donaldson	15	2017	TOR	112	100	28	6	0	23	11	1	26	112	79	21	0	0	0	.280	.357	.790	1.147
8	Frank Thomas F. Thomas	15	1993	CWS	153	120	42	7	0	35	29	0	14	153	94	22	0	4	2	.350	.464	.783	1.247
9	Kyle Schwarber K. Schwarber	14	2023	PHI	143	116	27	6	0	19	28	0	37	144	75	20	0	0	0	.233	.382	.647	1.028
10	Giancarlo Stanton G. Stanton	14	2017	MIA	139	115	30	5	0	28	22	2	34	139	77	19	0	0	0	.261	.388	.670	1.058
11	Albert Pujols A. Pujols	14	2003	STL	145	134	48	14	0	35	7	2	17	145	104	28	0	2	0	.358	.393	.776	1.169
12	Ken Griffey Jr. K. Griffey Jr.	14	1997	SEA	157	131	37	8	0	31	21	0	32	157	87	22	0	5	0	.282	.369	.664	1.034
13	Gary Sheffield G. Sheffield	14	1996	FLA	139	101	30	7	0	38	36	1	13	139	79	21	0	1	2	.297	.482	.782	1.264
14	Jim Rice J. Rice	14	1978	BOS	163	149	55	6	5	43	13	0	29	163	113	25	0	1	0	.369	.417	.758	1.176
15	Ketel Marte K. Marte	13	2024	ARI	127	114	41	10	0	19	12	2	19	128	90	23	0	0	0	.360	.430	.789	1.219
16	Austin Riley A. Riley	13	2023	ATL	158	144	49	7	1	34	9	2	39	158	97	21	0	3	0	.340	.380	.674	1.053
17	Kyle Schwarber K. Schwarber	13	2021	TOT	71	63	22	3	0	15	7	1	22	71	64	16	0	0	0	.349	.423	1.016	1.438
18	Nolan Arenado N. Arenado	13	2018	COL	139	118	35	6	1	34	16	1	25	139	82	20	0	4	0	.297	.374	.695	1.069
19	Paul Goldschmidt P. Goldschmidt	13	2018	ARI	146	123	41	6	1	22	22	1	37	147	88	20	0	0	1	.333	.438	.715	1.154
20	José Ramírez J. Ramírez	13	2018	CLE	157	137	31	3	0	35	15	2	21	157	73	16	0	3	0	.226	.306	.533	.839
21	Josh Donaldson J. Donaldson	13	2015	TOR	152	135	44	8	0	19	14	2	27	152	91	21	1	0	0	.326	.397	.674	1.071
22	Albert Pujols A. Pujols	13	2015	LAA	136	125	29	3	0	27	9	1	15	136	71	16	0	1	1	.232	.287	.568	.855
23	Alfonso Soriano A. Soriano	13	2003	NYY	150	142	48	13	1	13	9	2	25	153	102	27	0	0	0	.338	.386	.718	1.104
24	Mark McGwire M. McGwire	13	2000	STL	63	52	22	0	0	33	8	3	19	63	61	13	0	0	2	.423	.524	1.173	1.697
25	Jeff Bagwell J. Bagwell	13	1997	HOU	157	124	38	8	0	35	27	5	33	158	85	21	0	2	2	.306	.443	.685	1.129