Flagg is the only draft pick for the Mavericks, but he's certainly far from the only rookie on the Summer League roster. The Mavericks have several rookies flanking Flagg in Las Vegas, most notably former Auburn guard Miles Kelly and former Gonzaga guard Ryan Nembhard.

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