He played for the Calgary Flames and St. Louis Blues of the National Hockey League (NHL).

Known as Sergei Varlamov during his North American career from the Russian-language version of his name, Varlamov came to North America to play junior hockey with the Swift Current Broncos of the Western Hockey League (WHL).

In 1998, he won the Bob Clarke Trophy as the WHL's top scorer with 119 points.

[2] After spending a year in the Vancouver Canucks organization, Varlamov signed with Ak Bars Kazan of the Russian Super League in 2004 and has also played with HC Sibir Novosibirsk, Severstal Cherepovets, SKA Saint Petersburg and HC Dinamo Minsk.

[2] Internationally, Varlamov played with the Ukraine men's national ice hockey team at the 2002 Winter Olympics and at three World Championships: 2000, 2004 and 2005.