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.

The NBA's summer league, officially called NBA 2K26 Summer League this year, is in full swing in Las Vegas. Duke star Cooper Flagg made his debut vs. Bronny James and the Los Angeles Lakers on Thursday ( and it was a big hit) and faces Dylan Harper and the San Antonio Spurs on Saturday.