In 2011, Péter Hornyák made his debut in Dunaferr Alexandra among adults in Nemzeti Bajnokság I.
At the age of 18, he was contracted abroad and certified for the German second division team of TUSEM Essen.
[1] They were also satisfied with his performance at the club, but after two seasons he was confirmed again to Hungary, the Csurgói KK, mainly due to his homesickness.
He spent two seasons with the Balaton shore team, and from the summer of 2019 he continued his career with Grundfos Tatabánya KC.
[2] On September 25, 2021, he suffered a cruciate ligament rupture in the SBS-Eger-Grundfos Tatabánya KC match.