Here was the official Eurobasket press release:
Defending champion BC Kalev/Cramo Tallinn (Alexela KML) strengthened their roster with addition of 21-year old American point guard Isaiah Briscoe (191-93kg-96, college: Kentucky). He already started the season at Portland Trail Blazers in the NBA.
Briscoe played at University of Kentucky last two seasons before declaring for the NBA draft and it is his first season in pro basketball. His team won SEC Tournament for two years in a row (2016 and 2017).
He averaged 10.9 pt, 5.4 rb and 3.7 as per game over two seasons in the NCAA.