Mezue ahịrịokwu na-esonụ: Kozlov bụ onye San Jose Sharks wepụtara na agba nke mbụ dịka nhọrọ nke isii n'ozuzu na
1993 NHL Entry Draft. Kozlov gbara goolu mbụ ya maka Sharks megide Ed Belfour na Chicago Blackhawks na 21 Machị 1995 na 7 <unk> 3 Sharks. Ọ ga-egwu oge ole na ole na San Jose tupu a gbanwere ya na Florida Panthers na 13 Nọvemba 1997. Ọ ga-abụ na Florida, na-egwuri egwu na Pavel Bure, na Kozlov ga-enwe afọ kachasị mma ya. Oge kachasị mma ya bụ n'oge oge 1999-2000 mgbe o setịpụrụ ọrụ kachasị elu na enyemaka na isi ihe. O soro ndị Panthers ruo na 1 Machị 2004, mgbe a gbanwere ya na New Jersey Devils maka Christian Berglund na Victor Uchevatov.