Tim MacMahonOct 15, 2025, 07:00 AM ET Close Joined ESPNDallas.com in September 2009 Covers the Dallas Cowboys and Dallas Mavericks Appears regularly on ESPN Dallas 103.3 FM SEVENTEEN-YEAR-OLD COOPER FLAGG had not yet played a single game for Duke when he walked into UNLV’s Mendenhall Center on the afternoon of July 8, 2024. But he...