Bartosz Slisz is a 27-year-old Polish professional footballer who currently plays as a defensive midfielder for Brøndby IF in the Danish Superliga. He joined the club in January 2026 on a three-and-a-half-year contract after a successful tenure in Major League Soccer (MLS) with Atlanta United. In 2018, he signed for Zagłębie Lubin. On 28 February 2020 he became a footballer of Legia Warsaw. He signed a contract with the Warsaw club until the end of 2024. The team from Warsaw paid 1.8 million euros for the transfer to Zagłębie Lubin, which is a record amount for which a Polish team bought a footballer. He made his debut for the Poland national football team on 5 September 2021 in a World Cup qualifier against San Marino, a 7–1 away victory. He substituted Jakub Moder at half-time.