The club announced that Sportiello has chosen the number 57 for his jersey. This is a welcome return for Sportiello, who previously played for Atalanta from 2013 to 2017 and again from 2019 to 2023. During his time with the team, he made his Serie A debut and appeared in 137 matches across all competitions over seven and a half seasons.
Sportiello's experience includes playing in the historic 2019/20 UEFA Champions League matches against Valencia and Paris Saint-Germain. He has made over 200 Serie A appearances in his career, with 208 of those coming from Atalanta, Fiorentina, Frosinone, and Milan.
The Percassi family, the Pagliuca family, and the AC Milan club have welcomed Sportiello back to the team, wishing him success both personally and as a team member.