Sergei Kostitsyn is 2003 first round pick Andrei Kostsitsyn's brother.
2004-05: Kostitsyn has been playing for HC Gomel in Belarus, tallying four goals and 10 assists in 40 games with 24 PIM. He also played in the U-18 WJC tournament in 2005, coming through with one goal and six points at +5 in four games. He also played with his brother in this year's U-20 WJC tournament, where he was shut out in his team's six games.
2005-06: Encouraged to come to London as a direct result of his brother’s challenges acclimatizing to the North American game in Hamilton, the younger Kostitsyn fit in well with the defending Memorial Cup champs. Almost immediately he stepped into the breach and into a top-six forward role and a spot manning the point in London’s much-ballyhooed five-forward power play unit, helping to power the high-flying Knights to a third-straight OHL regular season title. He won Rookie of the Month honors in both October and November. Kostitsyn also led Team Belarus to a victory over Kazakhstan in the World Junior Pool B Championships, earning his country an invite to the big dance in 2007. For his four-goal, five-assist performance, Kostitsyn earned tournament MVP and top forward honors.
2006-07: At the beginning of the year, there were expectations that two Kostitsyns would be patrolling the ice in Hamilton – at least there were those expectations in the younger brother. However, the Habs had other ideas for the younger Belarusian, and he would return to London for another season. He got off to a sluggish start with the Knights, however, it would be a trip to the World Juniors, where Kostitsyn enjoyed personal, if not team, success, that seemed to mark the turning point. He finished off the season third in the OHL in scoring and made a greater commitment to working on the defensive aspect of his game.
Kostitsyn is a very well-rounded forward who combines offensive skill with solid defensive play. He has solid skating ability and good overall puck skills. Kostitsyn is also a smart player with considerable hockey sense.