Harsányi started his professional career at his hometown club Nyíregyházi KC, before moving to PLER KC. He spent a decade with the Pestszentlőrinc-based team and captured a Hungarian Cup bronze in 2007. He signed to Ferencvárosi TC in the summer of 2009, however, after financial difficulties with the club were revealed, Harsányi was transferred to Tatabánya-Carbonex KC in the winter break to ease the growing troubles at the club.[2]
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