Kazakov officiated over 100 matches in the Soviet Top League. In 1959, he was awarded the Master of Sports of the USSR. He was awarded USSR referee of the year on 15 occasions (from 1961–1965, and 1967–1976 inclusive), which was a record for a Soviet or Russian official. He officiated the 1973 Soviet Cup Final between Ararat Yerevan and Dynamo Kyiv, and the 1976 Soviet Cup Final between Ararat Yerevan and Dinamo Tbilisi.
