Glas started playing professional basketball for
Primorska. In August 2018, he attended the
Basketball Without Borders Europe camp in
Belgrade, Serbia. On October 24, 2019, he signed with Serbian club
Dynamic VIP PAY. Following the 2020–21 season Glas declared for the
2021 NBA draft. On July 19, 2021, he withdrawn his name from consideration for the 2021 NBA draft. On September 26, 2021, he signed with Serbian powerhouse
KK Partizan. On August 26, 2025, he signed with
Vienna of the
ABA League. ==International career==