Kuzmin competed for the Kazakh swimming squad in the men's 50 m freestyle at the 2008 Summer Olympics in Beijing. Leading up to the Games, he stormed home the field with a winning time of 23.09 to eclipse the FINA B-cut by just a fingertip of a second (0.04) at the Kazakhstan Open Championships in Almaty. Swimming in heat seven, Kuzmin dipped under the 23-second barrier to take the fifth spot in a scorching lifetime best of 22.91, but missed the semifinals with a forty-eighth overall placement from a roster of ninety-seven entrants.