According to Sporting News, Flagg’s mom, Kelly Flagg, attended Nokomis Regional High School and scored 1,257 points in her high school hoops career. She proceeded to play at the collegiate level at the University of Maine.

This article was originally published on www.si.com/nba/mavericks as Cooper Flagg 'passed the eye test' with Mavericks' Summer League stint. The Dallas Mavericks are in the dead part of the offseason, but they are still enamored by Cooper Flagg, who they selected with the No. 1 overall pick in the 2025 NBA Draft.

The Dallas Mavericks won the 2025 NBA Draft Lottery and selected Duke star Cooper Flagg with the first pick. After trading Luka Doncic to the Los Angeles Lakers last season, Flagg is the new franchise player in Dallas.