Kammala jumla mai zuwa: Pecarski ya kasance memba ne na tawagar 'yan kasar Serbia' yan kasa da shekaru 19 da suka kammala na 7 a gasar cin kofin duniya na 'yan kasa da shekaru 19.
2019 FIBA Under-19 Kwallon Kwando na Duniya a Heraklion, Girka. A cikin wasanni bakwai na gasar, ya samu maki 22.1 da 8.6 a kowane wasa. Pecarski ya kasance memba na ƙungiyar Serbia ta ƙasa da 20 wanda ya gama na 15 a Gasar Zakarun Turai ta FIBA U20 ta 2019 a Tel Aviv, Isra'ila. A cikin wasanni shida na gasar, ya samu maki 18.8 da 8.8 a kowane wasa.