For the second half of the 2019–20 season, he was sent on loan to Italian Serie A club Cagliari Calcio.[2]
In 2020, Mas returned to GKS Bełchatów.
On 1 August 2022, shortly after terminating his contract with Jagiellonia Białystok, he joined I Liga side Sandecja Nowy Sącz on a two-year contract.[3] On 5 January 2024, he terminated his contract by mutual consent.[4] Three days later, Mas returned to Skra Częstochowa on a six-month contract with an option for another year.[5]