I don't have anything for this season, but Mateo Retegui tallied the most goals in a Serie A game in a 1st half in 2024-25, with 3 goals versus Verona on February 8.

most goals scored by a player in one half of a game this season

	NAME	G	DATE	CLUB		OPP	A	PK	YC	RC
1	Mateo Retegui M. Retegui	3	2/8/2025	Atalanta	@	Verona	0	0	0	0
2	Daniel Maldini D. Maldini	2	5/25/2025	Atalanta	vs	Parma	0	0	0	0
3	Lorenzo Venturino L. Venturino	2	5/24/2025	Genoa	@	Bologna	0	0	0	0
4	Charles De Ketelaere C. De Ketelaere	2	5/4/2025	Atalanta	@	Monza	0	0	0	0
5	Scott McTominay S. McTominay	2	4/27/2025	Napoli	vs	Torino	0	0	0	0
6	Fabio Miretti F. Miretti	2	3/14/2025	Genoa	vs	Lecce	0	0	1	0
7	Sebastiano Esposito S. Esposito	2	12/8/2024	Empoli	@	Verona	0	0	0	0
8	Marcus Thuram M. Thuram	2	11/23/2024	Inter	@	Verona	1	0	0	0
9	Rafael Leão R. Leão	2	11/9/2024	Milan	@	Cagliari	0	0	0	0
10	Ademola Lookman A. Lookman	2	11/3/2024	Atalanta	@	Napoli	0	0	0	0
11	Moise Kean M. Kean	2	10/27/2024	Fiorentina	vs	Roma	0	0	0	0
12	Piotr Zieliński P. Zieliński	2	10/27/2024	Inter	vs	Juventus	0	2	0	0
13	Ademola Lookman A. Lookman	2	10/26/2024	Atalanta	vs	Verona	2	0	0	0
14	Danilo Cataldi D. Cataldi	2	10/20/2024	Fiorentina	@	Lecce	0	0	0	0
15	Marcus Thuram M. Thuram	2	10/5/2024	Inter	vs	Torino	0	0	0	0
16	Lassana Coulibaly L. Coulibaly	1	5/25/2025	Lecce	@	Lazio	0	0	0	0
17	Lorenzo Lucca L. Lucca	1	5/25/2025	Udinese	vs	Fiorentina	0	0	0	0
18	Leandro Paredes L. Paredes	1	5/25/2025	Roma	@	Torino	0	1	0	0
19	Suat Serdar S. Serdar	1	5/25/2025	Verona	@	Empoli	0	0	0	0
20	Jacopo Fazzini J. Fazzini	1	5/25/2025	Empoli	vs	Verona	0	0	0	0
21	Randal Kolo Muani R. Kolo Muani	1	5/25/2025	Juventus	@	Venezia	0	0	0	0
22	Kenan Yıldız K. Yıldız	1	5/25/2025	Juventus	@	Venezia	0	0	0	0
23	Daniel Fila D. Fila	1	5/25/2025	Venezia	vs	Juventus	0	0	0	0
24	Vitinha	1	5/24/2025	Genoa	@	Bologna	1	0	0	0
25	Scott McTominay S. McTominay	1	5/23/2025	Napoli	vs	Cagliari	0	0	0	0