Kacper Marchewka is a professional Polish basketball player for Trefl Sopot in Polish Basketball League (PLK), playing as a shooting guard.
Professional career A product of Śląsk Wrocław's academy, he won the under-18 national title in 2020 where he was named MVP of the tournament. His PLK debut was also at Śląsk, and he went on to win the title with them.
On 4 August 2022 he joined Arka Gdynia. Arka had a policy of recruiting very young players with potential, and after a season in the summer of 2023 he was only one of four players to stay at the club (the others being , Adam Hrycaniuk and Adrian Bogucki).
After two seasons he joined Górnik Wałbrzych in the summer of 2024. Górnik was promoted from the second tier by becoming champions at the end of 2023–24 season after spending 15 years in the lower leagues. In the club's maiden PLK season, Marchewka was part of the squad that triumphed in the 2025 Polish Cup, the club's first in its history. At Górnik, Marchewka averaged 3.6ppg, 2.0rpg, and 1.3apg in 24 league games in 2026, where he played a key role in helping Górnik reach the Polish Cup semi-finals that year.
He rejected a contract extension offered by Górnik in 2026 in favour of working with his former coach at Arka, , now at tricity rivals Trefl Sopot. In July 2026 he was confirmed as the first and one of the main signings for Trefl ahead of the upcoming season.
Achievements
Team Śląsk Wrocław PLK Champion gold medal: 2022 Bronze medal: 2021 Eurocup Participant: 2021–22 U-20 EuroChallenge Participant Polish U-19 championship: Vice-champion silver medal: 2021 Bronze medal: 2019 Polish U-17 championship Bronze medal: 2019 Polish U-15 championship Vice-champion silver medal: 2018
Górnik Wałbrzych Polish Cup Gold medal: 2025
Individual Polish championship squad inclusion: U-19: 2021 U-17: 2019 U-15: 2018
International U-18 EuroBasket Division B: Vice-Champion silver medal: 2019 U-20 EuroBasket Participant (13th): 2022
References
External links PLK profile PZKosz profile Scout Basketball profile Śląsk Wrocław profile Eurobasket profile ProBallers profile