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.”

Cooper Flagg made his highly anticipated debut for the Dallas Mavericks on Thursday in the NBA 2K26 Summer League against the Los Angeles Lakers and Bronny James in Las Vegas.

LAS VEGAS — He missed 16 of 21 shots, including all five attempts from deep, and airballed his first and final shots. And those who saw his NBA 2K26 Summer League debut still came away with a consensus gut feeling: Cooper Flagg is right on pace to be a problem.