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

Cooper Flagg made his professional debut Thursday night in the NBA Summer League and celebrated an 87-85 win over Bronny James and the Los Angeles Lakers.

In his second Summer League outing, the 18-year-old Flagg put up a game-high 31 points while shooting 10-for-21 against the Spurs on Saturday. The Mavericks ultimately lost the game 76-69, with incoming rookie Dylan Harper leading the way with 16 points, six rebounds and two steals for San Antonio.

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.

LAS VEGAS- In a battle that featured three 2025 lottery picks, the anticipation didn’t outweigh the on-court production.

Rookie Cooper Flagg may not have been happy with his professional debut Thursday night in the NBA Summer League, but he still drew rave reviews all around after the Dallas Mavericks defeated the Los Angeles Lakers,

Mavericks NBA Summer League game, which marked the NBA debut of #1 pick Cooper Flagg, averaged 955,000 viewers on ESPN — marking the fourth-largest Summer League audience ever on

Flagg's fans had plenty of energy, electrifying the jam-packed arena that went cheered loudest when he was announced as a starter.