|Date of birth||22 June 1987|
|Place of birth||Greece|
|Height||1.76 m (5 ft 9 1⁄2 in)|
|Playing position||Right-back / Winger|
|2009||→ Pyrsos Grevena (loan)||13||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 9 January 2017.
Kaznaferis began his professional career in Anagennisi Artas. He played in his birthplace team from 2004 to 2006. In this 2 years, Kostas appeared in 29 matches and scored one goal. His appearances with Anagennisi were enough to pull interesting by many teams in Greece.
Kaznaferis has two spells with Pas Giannena. In his first one, he played in Ajax of Epirus by 2006 to 2008. His appearances with Pas Giannena made him one of the biggest talents of Epirus. In his first spell, Kostas made 39 appearances, he scored 1 goal and he made a lot of assists. In his second spell to Pas Giannena (2009-2010), Kaznaferis continued great performances and big teams were looking him. In this spell, he made about 10 appearances and scored 1 goal.
Pyrsos Grevenon loan
In 2009-2010 first half of season, Kaznaferis went on loan to Pyrsos Grevenon, a team in Greek Gamma Ethniki. He made 13 appearances without scoring, and he never persuaded Pyrsos for signing him. As a result, he returned quickly to Pas Giannena.
His vindication came in summer of 2010. Aris F.C., one of the biggest teams in Greece, made an offer to sign him. In his first season to Theesaloniki, Kaznaferis made a little performances, playing at many positions and not giving good performances. 2011-2012 season was Kaznaferis's best season of his career. By then, he has established as basic and irreplaceable right back of Aris, giving incredible performances and he stands out for his passion.
Kaznaferis continued his career at Lokomotiv Plovdiv. It is important to mention that the Bulgarian team coach was Hristo Bonev, who had a remarkable career in the Super League for AEK, besides the fact that he served as a coach of Panathinaikos, Larissa and Ionikos. He made his debut at 26 September in an away loss against Lovech.
Kaznaferis did not manage to incorporate to his environment, therefore he initially managed to return to his previous club Aris, but due to financial and administrative problems, he finally decided to join Platanias. As a consequence, he returned to Superleague Greece and he made his debut with his new club on 20 January 2014, in a 2-0 home loss against OFI.
On the 13 of September 2015, Kaznaferis resigned for Aris F.C.
- Β Εθνική / ΓΙΑΝΝΙΝΑ ΠΑΣ ΠΑΕ / ΚΑΖΝΑΦΕΡΗΣ ΚΩΝ/ΝΟΣ (in Greek). Hellenic League. Retrieved 2009-11-25.
- Dermendzhiev, Tsvetan (2013-09-13). "Преди дербито в събота, на Лаута представиха още двама нови играчи" (in Bulgarian). 7sport.net. Retrieved 2015-10-20.
- Konstantinos Kaznaferis at Soccerway
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