Mattia Caldara (Italian pronunciation: ; born 5 May 1994) is an Italian professional footballer who plays as a centre back for Milan, and the Italy national team.
Born in Bergamo, Caldara began his career with hometown club Atalanta, entering in the youth categories. He played for the Primavera team from 2011 to 2014, (2013–14 season as an overage player), and on 5 May 2014, Caldara made his professional debut coming on as a second-half substitute in a Serie A match against Catania.
On 3 July 2014, he was loaned to Serie B side Trapani to gain more experience. On 14 August he made his debut as a starter in a 2–1 home defeat against Cremonese in the second round of Coppa Italia. On 7 September, Caldara made his Serie B debut as a substitute replacing Enis Nadarevic in the 62nd minute of a 2–1 home win over Vicenza. On 13 September he played his first entire match in Serie B for Trapani, a 2–1 home win against Cittadella. On 16 May, Caldara scored his first professional goal in the 96th minute of a 1–1 away draw against Avellino. On 22 May he scored his second goal in the 49th minute of a 2–1 home win over Pro Vercelli. Caldara ended his season-long loan to Trapani with 21 apparences and 2 goals.