Career
Born in Petrich, Kokonov started his career in his hometown with Belasitsa Petrich. Then he played for Pirin Blagoevgrad, before joining Vekta Plovdiv as a youth player. He made his professional debut for Sliven 2000, during 2009-2010 season, on 13 April 2010 in a 0–2 away loss against Chernomorets Burgas, coming on as a substitute for Nikolay Dimitrov.