2008-09: Alexei Marchenko skated for CSKA Moscow's club in Russia's third league as well as competing for the Russian 1992-born squad in international competition. He represented Russia at the 2009 U17 World Hockey Challenge and had 3 assists with 10 PMs in five games.
2009-10: Appeared in 43 games for CSKA’s junior team (in the MHL) and posted 11 goals and 23 points as well as going scoreless in a pair of post season tilts for the club. He also had 10 KHL appearances for CSKA and failed to register a point. He went undrafted in his first year of eligibility.
2010-11: Produced at over a point per game (38 points in 36 games) for CSKA’s junior club, along with 3 goals and 8 assists in 15 playoff games. He also played in 23 KHL contests for CSKA notching 2 assists in the process.
2011-12: Marchenko skated in six games for CSKA Moscow in the KHL and was impressive in the MHL (Russian U22 league) playoffs after missing most of the season, including the 2012 U20 World Junior Championship, due to a knee injury. He was scoreless and minus-four with 2 penalty minutes in his brief KHL stint. He skated in five regular season games for CSKA-Red Army in the MHL, scoring 2 goals with 4 assists and was plus-two with 10 penalty minutes. Marchenko was the leading scorer amongst defensemen for CSKA-Red Army in the playoffs, finishing with 4 goals and 14 assists. The defending Kharlamov Cup champions, CSKA-Red Army was defeated by Omskie Yastrebi in the MHL finals.
Marchenko is a very aggressive player, a strong skater, and one who projects long term as more of a defensive defenseman. He put up points in the lower levels, however his style of play is more suited to a shut down, physical role than one of a player who will excel offensively. There is some scoring ability, as evidence by his MHL totals, but it’s not the defining trait of his game.
He will return to the KHL in 2012-13 after injuries limited him to only 11 games in 2011-12. A move to Grand Rapids of the AHL is likely in 2013-14 if he plays the way he did before being injured.