1. However, following the acquisition of Alessandro Matri in the late days of the summer transfer window, Milan decided they would let Andrea Petagna go out on loan to Sampdoria in order to gain more first team experience.

1. However, following the acquisition of Alessandro Matri in the late days of the summer transfer window, Milan decided they would let Andrea Petagna go out on loan to Sampdoria in order to gain more first team experience.
Andrea Petagna finished the season with three more senior appearances, while being mainly employed by the under-19 squad managed by Filippo Inzaghi.
On 25 January 2016, Andrea Petagna signed for Atalanta and was loaned to former club Ascoli until 30 June 2016.
On 19 July 2018, Andrea Petagna signed for SPAL on loan until 30 June 2019 with an obligation to buy.
Andrea Petagna made 37 appearances scoring 17 goals in all competitions, On 1 July 2019, Petagna was signed on a permanent deal by SPAL.
On 12 August 2022, Andrea Petagna joined newly promoted Serie A side Monza, with an obligation for purchase if certain conditions are met.
Andrea Petagna won five caps for Italy under-16 between 2010 and 2011.
Andrea Petagna went on to be capped for Italy under-18, making eight appearances and scoring two goals in 2013.
Andrea Petagna made his debut with the Italy U21 team on 11 October 2016, in the 2017 European U21 Championship qualification match against Lithuania in Kaunas.
Andrea Petagna gained notoriety at the tournament after winning the semifinal game, when he celebrated by taking his shorts off and showing off his briefs.
Andrea Petagna is the grandson of a former football player and coach Francesco Andrea Petagna.
Andrea Petagna is partially of Jewish ancestry; his great-grandfather was a victim of the Holocaust in Italy.