Career
Lyashko qualified for the men"s 100 m butterfly at the 2004 Summer Olympics in Athens, by posting a FINA B-standard of 56.08 from the Kazakhstan Open Championships in Almaty. He challenged seven other swimmers in heat two, including 17-year-old Michal Rubáček of the Czechoslovakian Republic. Lyashko failed to advance into the semifinals, as he placed forty-sixth overall in the preliminaries.