Career
Šorša started his career playing at youth level for his hometown club Osijek, with whom he signed a professional four-year contract in July 2006. He made his debut for the first team in the 2006-2007 season and made a total of thirteen appearances before being loaned to Druga HNL side Karlovac for the 2008-2009 season. In September 2009, Šorša extended his contract for four more years.
The following season Šorša scored his first goal in Prva HNL in a 3–1 victory over Istra 1961.
He began his career as a striker, but manager Tomislav Steinbrückner moved him into a midfield role during the course of the season.