Panathinaikos Kotsaris made his senior debut for Panathinaikos on 8 January 2015, in a
Greek Cup match against
Chania. On 11 November 2018, in an away 1–1 draw against rivals
Olympiacos forced to replace the first choice keeper
Sokratis Dioudis, as the latter suffered a face injury in a strong aerial challenge from
Bibras Natcho. It was his first appearance in
Super League and has shown an incredible stability despite his first match.
Apollon Smyrnis On 14 September 2020,
Apollon Smyrnis officially announced the signing of the greek goalkeeper on a free transfer. ==Career statistics==