Adrian Mierzejewski

Early career

Born in Olsztyn, Mierzejewski began his career at local side Tempo 25 Olsztyn, then he moved to Naki Olsztyn. On 31 May 2003, aged 16, he made his II liga debut for Stomil Olsztyn in a game against Świt Nowy Dwór Mazowiecki, coming on as a substitute for Marcin Kubsik in 79th minute. He ended the 2002–03 season having made three league appearances, all as a substitute. After the season, he returned to Naki Olsztyn.

Wisła Płock

In 2004 Mierzejewski signed a five-year contract with Wisła Płock for a fee of 15 000 złotys. He made his Ekstraklasa debut on 15 May 2004 in a match against Dyskobolia Grodzisk Wielkopolski, when he came on as a substitution for Dariusz Romuzga 86th. He made his first league on start on 8 June 2004 in a 1–1 draw with GKS Katowice. Mierzejewski played 45 minutes and was replaced by Klaudiusz Ząbecki. He ended the 2003–04 season with three league appearances. On 10 November 2004 he scored his first goal for Wisła in a 5–1 win over Kujawiak Włocławek in the Polish Cup. On 1 May 2005 Mierzejewski scored his first Ekstraklasa goal in a game against Górnik Łęczna which Wisła lost 2–3. Mierzejewski ended the 2004–05 season with 18 appearances and four goals in all competitions. On 11 August 2005 he made his debut in European competition playing in a UEFA Cup second qualifying round match against Grasshopper. Mierzejewski ended the 2005–06 season with 27 appearances and two goals in all competitions. He also won the Polish Cup…

After retirement, Mierzejewski obtained an UEFA A coaching license and completed a sporting director course organized by the Polish Football Association. On 17 July 2025, he was hired as the technical director of the Poland national team.

Club

International

Scores and results list Poland's goal tally first, score column indicates score after each Mierzejewski goal.

Mierzejewski played for U18, U19, U20 and U21 national teams. On 29 May 2010 he debuted for the national team of Poland in a friendly match against Finland. On 5 June 2011, he scored his first goal for the national team, giving his team a 1–0 lead in a friendly match against Argentina. The match ended with a 2–1 victory for Poland.