Career
He plays for Football Club Karelia Petrozavodsk. Born in Leningrad, Pyatnikov began playing football in the Football Club Smena-Zenit youth academy. He would later join Football Club Zenit Saint St. Petersburg, but never broke into the first team
Pyatnikov played on loan for Smena-Zenit in the Russian Second Division before leaving the parent club Zenit.
Pyatnikov tried to resurrect his career by moving to Moldova, where he played for six months with Football Club Sfîntul Gheorghe. He would join Football Club Nistru Otaci on another short-term deal later in 2011.