During a recent NBA Summer League game, the former Duke standouts greeted each other courtside before tipoff, sharing a quick handshake and smile. The wholesome exchange didn’t go unnoticed, especially by Flagg’s mom, Kelly, who responded to the clip on social media with a heartfelt message: “Brothers forever.”

Mavericks rookie Cooper Flagg has already turned heads in his first two NBA 2K26 Summer League games. The main takeaways from his early showings offer a glimpse into his potential and could help shape expectations for his fantasy basketball value in the 2025-26 season.

Cooper Flagg's first and likely only NBA Summer League is over. The Dallas Mavericks have shut down the No. 1 pick in this year's draft after two summer league games