Career
Kazak made his official debut for the 2004 Summer Olympics in Athens, where he competed in the men"s 10 m running target, a shooting event which has since been removed from the Olympic events. Kazak shot 292 targets in the slow-run and 283 in the fast-run for a total score of 575 points, finishing only in ninth place. Eight years after competing in his last Olympics, Kazak qualified for his second Belarusian team, as a 32-year-old, at the 2012 Summer Olympics in London, by placing ninth in the free pistol from the sixth meet of the 2011 ISSF World Cup series in Munich, Germany.
Kazak scored a total of 547 targets in the qualifying rounds of the men"s 50 m pistol, by two inner tens behind his teammate Kanstantsin Lukashyk, finishing in thirty-first place.