LAS VEGAS (AP) — Cooper Flagg strolled into UNLV’s Thomas and Mack Center at 4:17 p.m. on Thursday, wearing Dallas Mavericks gear, bright white New Balance shoes, and an emotionless look on his face as he passed through security.

Dallas Mavericks head coach and former 19-year NBA veteran Jason Kidd praised 18-year-old Cooper Flagg's "incredible" poise in his 2025 NBA Summer League debut.

Bronny James Welcomes Cooper Flagg to NBA With Multiple Jumpers in His Face originally appeared on Athlon Sports. After being taken with the No. 1 overall pick in the 2025 NBA Draft by the Dallas Mavericks, Cooper Flagg officially made his NBA Summer League debut on Thursday at the Thomas & Mack Center.

Yes, Los Angeles Lakers guard Bronny James, the son of all-time great LeBron James, hit a sick step-back bucket right over Flagg during his team's Summer League scrimmage against the Mavs on Thursday night in Las Vegas.

Cooper Flagg is one of the most well-rounded prospects to enter the NBA in recent memory. His competitve drive started pea picking in Maine.

The anticipation is palpable as former Duke Blue Devils star and No. 1 overall pick Cooper Flagg prepares to make his Summer League debut on Thursday night for the Dallas Mavericks in a highly anticipated matchup against Bronny James and the Los Angeles Lakers.