Cooper Flagg made his NBA Summer League debut Thursday night and although he and the Dallas Mavericks earned the win, the No. 1 NBA Draft pick called it “one of the worst game of my life.”

Frenzy became bedlam on the next play. Flagg talked trash to James, ran to his spot on the left wing, pivoted off the catch and nailed the shot before turning to exult with his future Mavericks varsity teammates, who cheered him on decked out in casual wear from their courtside seats.

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.

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.

While Dallas Mavericks rookie Cooper Flagg has the usual pressure of being the No. 1 overall pick in the NBA Draft, the former Duke star is in a situation that sets up his rookie season to be tougher than even LeBron James and Victor Wembanyama’s first NBA campaigns.

In this video, we present our official mock draft for the 2025 NBA Draft, discussing top prospects including Cooper Flagg, Ace Bailey, and Dylan Harper. #nba #basketball