On 23 February 2021, Rusyn moved to Polish club Legia Warsaw, on a loan deal until December 2021,[5] joining his compatriot Artem Shabanov. The deal included an option to buy.[5] On 3 March 2021, he made his debut for Legia in a 1–2 Polish Cup defeat against Piast Gliwice at the Stadion Wojska Polskiego.[6] On 6 April 2021, after refusing to partake in Legia II's match against Legionovia Legionowo three days prior,[7] Rusyn was moved to the reserve team for two weeks.[8]
Sunderland
On 1 September 2023, Sunderland announced the transfer of Rusyn on a four-year contract for an undisclosed fee.[9] On 24 September, he made his debut for the club in a 1–0 home defeat to Cardiff.[10] On 1 January 2024, Rusyn scored his first goal for Sunderland in a 2–0 home win against Preston.[11]
^ ab"Nazarij Rusyn zawodnikiem Legii" [Nazari Rusyn is a player of the Legion]. Legia Warszawa Official Website (in Polish). 23 February 2021. Retrieved 23 February 2021.