Born in Krosno Odrzańskie, Poland, Walasek began his senior career in 1993 with ZKŻ Zielona Góra, and won the Polish Under-21 Championship in 1997. In 2000 he began riding in the UK with Poole Pirates. In 2004 he won the senior Polish individual championship. He was part of the Polish team that won the Speedway World Cup in 2005 and 2007.