Pedzisa mutsara unotevera: Kupfurikidza nokutamba nhamba shoma yemitambo, Kostin akatorwa nechisarudzo chokupedzisira mumutambo wokutanga we
2017 NHL Entry Draft neSt. Louis Blues. Pakutanga akafunga kuti arambe achivandudza muRussia, Kostin akaitwa mushandi akasununguka mushure mekunge Dynamo Moscow yakamanikidzwa kusunungura vatambi vavo vese kuburikidza nekutyora mitemo yeKHL musi wa4 Chikunguru 2017. Zuva rakatevera, Kostin akabvuma chibvumirano chemakore matatu neSt. Louis Blues. Kostin akati aizosarudza kutamba muNHL nokuda 2017-18 mwaka, kunyange asingadi vanoshora kuenda American Hockey League (AHL), pamusoro duku League affiliate nokuda NHL; Zvisinei akanga asina kufarira kutamba WHL, kana chero muduku League.