On 10 August 2014, Soriano scored five goals in an 8–0 home league demolition of SV Grödig. On 6 November, he netted a hat-trick as Salzburg won 5–1 at GNK Dinamo Zagreb in the Europa League group stage. He extended his contract in January of the following year until June 2018 or 2019, and at the end of the campaign was voted the league's Player of the Year. In the cup final, he scored an extra-time goal in a 2–0 win over FK Austria Wien.