Kupcewicz started playing football with Gwardia Olsztyn. He then played for
Stal Rzeszów before joining
I liga team
Pogoń Szczecin. While with Pogoń, he made 4 appearances in the league over the 1969–70 season. Kupcewicz then moved to the
Tricity, joining
Lechia Gdańsk, making his debut on 28 March 1971 against
Gwardia Koszalin. In total for Lechia Kupcewicz played in 20 games and scored 4 goals. After his time with Lechia, Kupcewicz joined Lechia's rivals
Arka Gdynia. While at Arka he is noted as having scored the clubs first ever goal in the I liga, Poland's top division. After his first goal against
ŁKS Łódź, he is known to have scored another 6 top flight goals for Arka. Kupcewicz's father,
Aleksander Kupcewicz, and his brother,
Janusz Kupcewicz, were also both former footballers. ==References==