On August 14, 2022, he signed a two-year deal, his first professional contract, with
Olympiacos of the
Greek Basket League and the
EuroLeague. In October 2022, he celebrated the first title of his professional career, which was the
Greek Super Cup, in the Final 4 of
Rhodes. On October 10, 2022, he made his debut in the
Greek Basket League, in the away match against
Apollon Patras. He contributed 6 points, one rebound and one assist in 10 minutes of action in his team's 61–87 victory. On December 12, 2022, Papas made his
EuroLeague debut in the
home game win against
Fenerbahçe, playing 2:51 minutes and scoring 2 points. In February 2023, he won another title with Olympiakos, that of the
Greek Cup in the Final 8 of Crete. On January 16, 2024, Papas was released from Olympiacos and joined
Promitheas Patras. After starting the 2025–2026 campaign with
Panionios, Papas was traded to
Maroussi for
Alexandros Nikolaidis on December 17, 2025. ==International career==