He made his Ekstraklasa debut in a 0–2 defeat to Ruch Chorzów on 23 September 1998 and on 23 October that year he scored two goals in a 3–1 victory over Stomil Olsztyn.

[2] After that season he was loaned to Odra Opole, and subsequently to Chrobry Głogów.

After three year at NEC he returned to Poland with Wisła Kraków for two seasons, and on 24 July 2009 signed a contract with Ruch Chorzów.

[5] In June 2010, Niedzielan signed a two-year contract with Ekstraklasa side Korona Kielce.

[9] In January 2012, Niedzielan left Cracovia after having his contract terminated by mutual consent before rejoining Ruch Chorzów.