Marcin Wasielewski

Marcin Wasielewski (born 23 August 1994) is a Polish professional footballer who plays as a right-back for Ekstraklasa club GKS Katowice.

He previously represented Lech Poznań, Znicz Pruszków and Bruk-Bet Termalica Nieciecza. Wasielewski can also operate as a right-sided wing-back.

Club career Early career Wasielewski began playing football with Poznaniak Poznań before joining the academy of Lech Poznań at the age of twelve. He progressed through the club's youth teams and appeared in the Młoda Ekstraklasa during the 2011–12 season.

After leaving Lech's academy in 2012, he spent a season with SKS 13 Poznań. In 2013, Wasielewski joined III liga club Unia Swarzędz, where he began his senior career. He made 60 league appearances and scored eight goals across two seasons.

Lech Poznań Wasielewski returned to Lech Poznań in 2015, initially joining its reserve team. He made 28 appearances and scored two goals during his first season after returning. His performances for the reserves led to his inclusion in the first-team squad by manager Nenad Bjelica in the autumn of 2016.

He made his first-team and Ekstraklasa debut on 10 February 2017, appearing in a 3–0 home victory over Bruk-Bet Termalica Nieciecza. He made two league appearances and one Polish Cup appearance for Lech during the 2016–17 season.

On 2 February 2018, Wasielewski joined II liga side Znicz Pruszków on loan until the end of the season.

Lech announced in April 2019 that Wasielewski would leave when his contract expired at the end of June. He recorded 19 Ekstraklasa appearances and one goal for the club's first team.

Bruk-Bet Termalica Nieciecza In April 2019, it was announced that Wasielewski would join I liga club Bruk-Bet Termalica Nieciecza on a free transfer from the beginning of the 2019–20 season.

He made 21 league appearances in his first season and 25 during the 2020–21 campaign. Bruk-Bet finished second in the I liga in the 2020–21 season and earned promotion to the Ekstraklasa.

Wasielewski appeared in 15 Ekstraklasa matches during the 2021–22 season. He left Bruk-Bet following the club's relegation, having made 61 league appearances over three seasons. He made his GKS debut on 16 July 2022 and appeared in 33 league matches during his first season.

Wasielewski retained his regular place following promotion. He made 32 league appearances, scored two goals and recorded six assists during the 2024–25 campaign.

On 29 April 2026, Wasielewski signed a new two-year contract with GKS, extending his stay until June 2028. The agreement included an option for an additional season.

In July 2026, he made his first appearance in UEFA club competition as GKS entered the qualifying rounds of the UEFA Conference League. As of 8 August, he had appeared in three Conference League qualifying matches during the 2026–27 season.

Career statistics

Lech Poznań II III liga, group II: 2018–19