Cooper Flagg is 19 years old in 2026. Born December 21, 2006, in Newport, Maine, he turned 19 in December 2025. Flagg is the youngest player discussed in this entire dataset, and already the centerpiece of the Dallas Mavericks' rebuild after just one season of professional basketball.
The Fastest Rise in Recent Basketball History
Flagg's single freshman season at Duke in 2024-25 was one of the most decorated in college basketball history: he averaged 19.2 points, 7.5 rebounds and 4.2 assists per game, led Duke to the Final Four, and swept the sport's major individual honors — the Naismith Award, the Wooden Award and National Player of the Year, all while playing much of the season at just 17 years old.
He declared for the 2025 NBA Draft and was selected first overall by the Dallas Mavericks on June 25, 2025 — arriving in Dallas just months after the franchise's shocking trade of star Luka Dončić. Flagg was 18 years old on draft night, one of the youngest No. 1 picks in NBA history, and went on to win Rookie of the Year after his debut season.
Cooper Flagg's Zodiac Sign
Born December 21, Flagg is a Sagittarius (on the Capricorn cusp) — a sign associated with fierce competitiveness, restless ambition and a drive to prove oneself against far more experienced peers, exactly the position he was in as a teenager competing against grown professionals. See our full zodiac breakdown for more.