2025 Panini COOPER FLAGG Rookie Card #10 NBA Summer League Debut - Graded GEM Mint 10. Cooper Flagg is widely regarded as a once-in-a-generation talent, and being the #1 overall pick in the NBA Draft speaks to his extraordinary skills. His blend of size, athleticism, and basketball IQ is rare, even among top-tier prospects. In his NBA Summer League debut, Flagg gave a game 7 effort. With 1:10 left, the No.1 pick crashed in to swat a Lakers layup, then he pushed the ball down the floor and dished to Ryan Nembhard for a go-ahead 3-pointer in an 87-85 victory.