Born in Carrara, Tuscany, Belloni played for nearby (35 km) team Spezia prior to joining Serie A club Inter Milan in 2008.
[1] On 17 April 2013, Belloni came on as a late substitute replacing Andrea Ranocchia in the 87th minute in 2012–13 Coppa Italia semi-final loss against Roma to make his debut.
Belloni made his debut on 17 August in the second round of Coppa Italia, he was replaced by Abdouramane Coly in the 59th minute of a 2–1 away defeat against Brescia.
[13] Belloni ended his season-long loan to Ternana with 20 appearances and scoring 2 goals, but he never play an entire 90 minute match.
[19] On 19 September, Belloni made his debut for Carpi, as a starter, in a 3–1 home defeat against Foggia in Serie B, he was replaced by Fabio Concas in the 51st minute.
[24] On 20 November 2013, Belloni made his U20 debut in an international friendly, he replaced Matteo Ricci in the 74th minute in a 5–0 win over Iran U20.