Cooper Flagg is enjoying his first NBA offseason after winning Rookie of the Year with the Dallas Mavericks . He’s doing so with a new girlfriend, too, while on a tropical vacation. The 19-year-old sensation and No. 1 overall pick out of the Duke Blue Devils 21.0 points, 6.7 rebounds, and 4.5 assists per game on his way to the coveted award. Apr 29, 2026; Dallas, TX, USA; Dallas Maverick Cooper Flagg makes his way to post press conference gathering in his honor for being named the 2025-26 NBA Rookie of the Year at American Airlines Center. | Raymond Carlin III-Imagn Images While the Mavs finished just 26-52 overall and missed the playoffs, the future is bright for Flagg. New woman in Flagg’s life He also recently went viral at his ROTY press conference where Duke women’s basketball star Arianna Roberson was sitting with his parents, signaling a public launch of their relationship. beautiful young lady sitting w Coop's parents family friend or girlfriend?…