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.

The No. 1 overall draft pick faces off against Bronny James and the Lakers in Summer League with broadcast available on ESPN and multiple streaming platforms.

The Mavericks entered Thursday hearing the buzz for Cooper Flagg's summer league debut. But this unknown rookie stole the show.