Lyashenko spent three seasons playing with
Torpedo Yaroslavl in his home country of Russia. In 130 games, he recorded 22
goals and 22
assists for 44 points. While playing with Yaroslavl, he was selected in the second round (52nd overall) of the
1997 NHL entry draft by the
Dallas Stars. Leading up to the draft, scouts described him as a defensive forward with good character and leadership skills. He was considered an atypical Russian prospect due to his attention to defensive play. One source had him ranked as a first round prospect. He signed with the Stars in July 1999. Lyashenko made his NHL debut with the Dallas Stars during the
1999–2000 season, seeing action in 58 games, while recording six goals and six assists. He also spent time with the Stars'
International Hockey League (IHL) affiliate
Michigan K-Wings, notching five points in nine games. The Stars went to the
Stanley Cup Final that season, but lost to the
New Jersey Devils. In the Stars' first round playoff series against the
Edmonton Oilers, Lyashenko scored the winning goal in the first game of the series. During the 2000 Western Conference final against the
Colorado Avalanche, Lyashenko scored the series clinching goal in game seven. Lyashenko played in 16 playoff games for the Stars. During the
2001–2002 season, Lyashenko played for four different teams, the Stars and Rangers at the NHL level as well as the IHL's Grizzlies, and the
Hartford Wolfpack of the
American Hockey League (AHL). ==International play==