During his career, Brzęczek played for Raków Częstochowa, Olimpia Poznań, Lech Poznań, Górnik Zabrze (two spells), GKS Katowice, Tirol Innsbruck (later Wacker Tirol), LASK Linz, Maccabi Haifa, Sturm Graz, FC Kärnten and Polonia Bytom, retiring in 2009 at age 38.

However, after a 2–0 away defeat to Slovenia and a home draw to Austria, Brzęczek faced heavy pressure from the fans calling for his dismissal.

Despite this, he managed to keep the team on track with two final wins over Latvia and North Macedonia, eventually qualifying for the UEFA Euro 2020 from the top spot in their group.

[4] Brzęczek was sacked on 18 January 2021,[5] five months before Poland's first match at the UEFA Euro 2020 and succeeded by the Portugal's Paulo Sousa.

[9] Brzęczek's nephew is a footballer, winger Jakub Błaszczykowski, who has most notably represented Wisła Kraków, Borussia Dortmund and VfL Wolfsburg.