For the second half of the 2013–14 season he played for Serie B club A.S. Avellino 1912, on loan from Livorno.

On 29 June 2014, Eintracht Braunschweig announced that Decarli had signed a five-year contract with the club.

[2] At the end of July 2017, he was temporarily demoted to the club's reserves for "team-damaging behaviour".

[3] Subsequently, he was not called up to the first-team squad by manager Torsten Lieberknecht while making one appearance for the reserves.

[7] On 12 June 2024, he returned to Switzerland, joining Swiss Super League side Grasshopper Club Zürich on a free transfer.