Wilczek was born in
Wirek, a district of
Ruda Śląska. He began his career with local team Wawel Wirek. In 1954, he moved to Zryw Chorzów, before joining
Górnik Zabrze in 1959, where he stayed until 1973. He made 293
Ekstraklasa appearances for Górnik, and 101 more in other competitions such as the
Polish Cup or European cups. He scored a total of 96 league goals for the Silesian club. He won nine Polish top flight titles (1959, 1961, 1963–1967, 1971, 1972), won the
Polish Cup six times (1965, 1968–1972), and reached the
1970 European Cup Winners' Cup final with Górnik. Between 1961 and 1969, he was capped 16 times for the
Poland national team, scoring two goals. In 1973, Wilczek moved to France, where he played for
US Valenciennes, becoming the top scorer of the French Second Division. After retiring, he became a scout for Valenciennes, before being appointed manager of their reserve team in 1977, and taking charge of the senior squad two years later. In the 1980s, he worked in Africa, among others for the team
AS Sogara from Gabon. ==Honours==