Oskar Pietuszewski

Youth career

Pietuszewski spent his entire youth career in Jagiellonia Białystok's academy. On 5 July 2022, he won the under-14 championship of Poland with the Podlaskie Football Association's team. On that day, Pietuszewski scored a hat-trick in a 5–2 victory against the Silesian FA's youth team. He was also the tournament's top scorer. On 23 August 2022, Pietuszewski scored a hat-trick during a 3–1 CLJ U-17 victory over Cracovia.

Jagiellonia Białystok

At the age of sixteen, Pietuszewski made his debut for Jagiellonia Białystok in the UEFA Europa League play-off round, a 3–0 away loss to AFC Ajax on 29 August 2024. On 1 December 2024, Pietuszewski made his Ekstraklasa debut in a 1–1 draw against Pogoń Szczecin, he substituted Darko Churlinov in the 80th minute. Six months later, on 4 May 2025, he scored his premiere goal for Jagiellonia during a 1–1 draw against Górnik Zabrze. This goal made him the second-youngest goalscorer in Jagiellonia's history, and the seventh-youngest goalscorer ever in the Ekstraklasa.

Porto

On 7 January 2026, Pietuszewski signed a three-year contract with Primeira Liga club Porto, where he joined fellow countrymen Jan Bednarek and Jakub Kiwior. The Portuguese side paid a reported €8 million fee, which could rise to €10 million with add-ons, and his release clause was set at €60 million. He made his debut on 18 January, coming on as a substitute and winning a penalty in a 1–0 league victory away at Vitória Guimarães.…

Poland U15 and U17

In August 2022, Pietuszewski was called-up to the Poland national under-15 team. He also featured for the Poland under-17s, where he made his debut in a 7–2 victory over Wales on 20 August 2023. He scored his first goal for Poland U17 team on 3 October, in the 27th minute of a 2–1 victory over Sweden. Overall, he played 15 matches for the team, scoring four goals.

Poland U21

Pietuszewski made his Poland U21 debut on 5 September 2025 as a 63rd-minute substitute, and scored the final goal of a 3–0 win over North Macedonia. At the age of 17 years, three months and 16 days, he became the youngest scorer in Poland U21's history.

Poland

He was first called-up to the Poland national team in March 2026 for the 2026 FIFA World Cup qualification play-offs. He made a debut on 26 March 2026 in a 2–1 semifinal win against Albania, coming on for the second half of the match.

Club

As of match played 20 September 2026

International

As of match played 3 June 2026

Jagiellonia Białystok

Polish Super Cup: 2024 Porto

Primeira Liga: 2025–26 Supertaça Cândido de Oliveira: 2026 Individual

Ekstraklasa Young Player of the Month: August 2025, September 2025