NEWPORT, MAINE — Cooper Flagg was eleven years old and playing AAU basketball when a travel coach told his parents, with an earnestness that surprised them, that his son’s footwork was wrong. Not bad, wrong, the coach clarified. What Flagg was doing naturally bore no resemblance to anything the coach had been trained to teach. He was developing movement patterns that players normally reach, if they reach them at all, only after years of deliberate drilling.
That instinctive sophistication, arriving years before most players would encounter it, defined how every subsequent evaluator described him. Born December 21, 2006, in Newport, Maine, Cooper Flagg is the youngest of three children to Kelly and Ralph Flagg. His twin brother Cash is also a competitive basketball player. Their father coached youth basketball in central Maine, and the brothers grew up in gymnasiums the way other children in the region grow up on hockey rinks.
Flagg attended Nokomis Regional High School in Newport through his freshman year before transferring to Montverde Academy in Florida, the boarding school whose alumni list reads like a condensed NBA draft board. At Montverde, surrounded by players who would themselves become first-round picks, Flagg distinguished himself not just by averaging a higher number than anyone else, though he did that too, but by reading the game a play ahead rather than reacting to it.
He committed to Duke University, and the recruitment drew attention disproportionate to its outcome. At Duke, under head coach Jon Scheyer, Flagg averaged 19.2 points, 7.7 rebounds, and 4.2 assists per game. He won the ACC Player of the Year award, the Oscar Robertson Trophy, and the Naismith College Player of the Year award, becoming the national consensus player of the year in his one college season. Duke reached the Final Four. Flagg declared for the NBA Draft in April 2025.
Whether any team would take someone else with the top pick had ceased to be a serious question around twelve months earlier. The Dallas Mavericks selected him No. 1 overall at the Barclays Center in Brooklyn in June 2025, making him the first player from Maine ever chosen at the top of the NBA Draft. He was eighteen.
Dallas came into the draft in transition. The Mavericks had moved Luka Doncic earlier in the calendar year, entering the lottery with a pick that could theoretically complicate their rebuild rather than accelerate it. What Flagg offered was two-way versatility that front offices do not normally find at the top of a draft: he could guard multiple positions, rebound beyond his frame’s expectations, and create offense within a structure that did not require primary ball-handler touches.
What he actually did in Dallas exceeded the projections. Flagg averaged 21.0 points, 6.7 rebounds, 4.5 assists, 1.2 steals, and 0.9 blocks per game across 70 games in his rookie season, starting every one. He posted 11 games of 30 or more points, the most by any first-year player since Victor Wembanyama in 2023-24. On December 1, 2025, he scored 35 points against the Los Angeles Clippers to become the youngest player in NBA history to score 35 or more points in a single game, breaking a record previously held by LeBron James. He was 18 years and 345 days old.
That record did not hold at the top of his own season. On April 3, 2026, Flagg scored 51 points against the Orlando Magic, becoming the youngest player in league history to top 40 points in a game. Two days later, he put up 45 against the Los Angeles Lakers. According to Bleacher Report, he finished as the second-youngest Rookie of the Year winner in NBA history, behind LeBron James, and joined Michael Jordan as the only two rookies to lead their team in total points, rebounds, assists, and steals since steals were first tracked in the 1973-74 season.
The league honored him with the 2025-26 Kia NBA Rookie of the Year award over Charlotte Hornets guard Kon Knueppel, 56 first-place votes and 412 total points for Flagg against Knueppel’s 386, one of the closer votes in recent memory.
Flagg stands 6 feet 9 inches and weighs approximately 205 pounds. He wears No. 2 for the Mavericks. The team around him for much of his debut season was incomplete: Kyrie Irving missed the year to injury, and Anthony Davis was traded to the Washington Wizards. Dallas finished 26-56 and missed the postseason. The individual production arrived within a context that offered very little around it, which was one of the arguments that made the ROY vote as close as it was.
In August 2026, the NBA confirmed that Flagg’s second professional season would open in Macao, with the Mavericks facing the Houston Rockets in the NBA China Games. The scheduling reflected both the league’s commercial priorities in Asia and Flagg’s rising profile as a face the NBA intended to export internationally.
Cooper Flagg’s twin brother Cash continues to play basketball competitively. Their parents remain in Newport, Maine. The community’s relationship with his success is precisely what you would expect from a small New England town that raised someone who now plays on national television on most weeknights, quietly proud and not inclined to overstate it.
What happens next, whether Dallas reassembles a roster capable of supporting a legitimate postseason run in Flagg’s second year, and whether that second year sustains the level of production his first produced, remains genuinely unresolved. A season that began in Maine and ended with a Rookie of the Year trophy and multiple youngest-in-history milestones has provided no clean answer to the question everyone will ask through 2026-27: how good does Cooper Flagg become?
