Wawrzyniak played for Legia Warsaw from fall 2007 to the end of 2008. On 30 January 2009 Panathinaikos announced his acquisition.
On 4 June 2009 the Disciplinary Committee of the Greek Superliga suspended him for three months on doping charges. His suspension was later extended to one year. Panathinaikos announced they would not take up their buy option on the player, thus leaving Wawrzyniak to return to Legia Warsaw, his current club. The substance in question is not prohibited by the World Anti-Doping Agency. Wawrzyniak appealed to the Court of Arbitration for Sport in Lausanne. In December 2009 the court shortened his suspension to the original three months. The player intends to pursue compensation from the Greek association.