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JUMP TO: After taking college basketball by storm, Cooper Flagg is taking on the NBA with the Dallas Mavericks.
Flagg turned in a historically dominant three years of prep basketball before winning a host of national player of the year honors during his lone season at Duke.
The success was no surprise to those who watched Flagg announce his arrival as a member of the Select Team that prepared the United States Senior Men's National Team for the Paris Olympics.
Despite being just a teenager, Flagg was a college hoops phenomenon unlike anything fans have seen in quite some time.
As he gears up to become a star at the NBA level, his preparedness for the moment makes sense because he hails from a basketball family.
Learn more about Flagg's basketball family, from his brothers to his parents, who also played the game at the college level.
MORE: How Cooper Flagg made NBA history with 50-point game Flagg has two brothers: An older brother, Hunter, and a fraternal twin, Ace.
Cooper and Ace Flagg were born on Dec.
21, 2006.
Hunter was born in 2004 and was a senior in high school during the twins' freshman year at Nokomis Regional High School in Newport, Maine.
After the twins spent the 2023-24 season at Montverde Academy in Florida, Ace transferred to Greensboro Day School in Greensboro, N.C., for his final year of high school basketball and now plays at the University of Maine.
MORE: What to know about NBA rookie patches Ace Flagg was ranked 272nd nationally on 247Sports' composite ranking of prospects in the class of 2025.
By those same metrics, he was ranked 55th among all power forwards and 20th among prospects in North Carolina.
He committed to the University of Maine on Oct.
30, 2024, and averaged 6.7 points, 4.1 rebounds and 1.5 assists per game during his true freshman season with the Black Bears.
MORE: Meet Cooper Flagg's 3-star recruit brother Cooper Flagg's parents are Ralph and Kelly Flagg (nee Bowman).
Flagg's mother, Kelly, played collegiately at the University of Maine.
She was a member of four NCAA Tournament teams, including the 1999 team that upset 7-seed Stanford in the Round of 64.
Flagg's father, Ralph, played collegiately at Eastern Maine Community College.
MORE: Where did Cooper Flagg's mom play basketball? Did Cooper Flagg reclassify? Yes, Cooper Flagg reclassified from the high school class of 2025 to the class of 2024.
He announced his reclassification in August 2023.
Because he reclassified and graduated high school early, Flagg enrolled at Duke University at 17 years old and was one of the youngest players in Division I basketball during his lone season with the Blue Devils.
Flagg's 18th birthday fell after he played 11 games at Duke.
Flagg became NBA Draft-eligible in 2025 and debuted before turning 19.
Flagg is from Newport, Maine, a town with a population of 3,133 at the 2020 census.
The presumptive No.
1 pick in the 2025 NBA Draft, Flagg is the third player in NBA history born in Maine.
MORE: How Cooper Flagg's mom went viral.