The NBA’s most anticipated rookie race in a decade ended with a familiar face on top. Dallas Mavericks forward Cooper Flagg was named the 2025-26 NBA Rookie of the Year on Monday, narrowly defeating his former Duke teammate Kon Knueppel in a vote that came down to the final ballots.

The 19-year-old Flagg becomes the youngest player in league history to win the award while averaging a double-double (18.2 points, 10.1 rebounds per game), a statistical milestone last achieved by Tim Duncan in 1998. His 26-point margin over Knueppel in the voting (487 points to 461) represented the closest finish since Damian Lillard edged Anthony Davis in 2013.

The Voting Breakdown: A Race That Went Down to the Wire

The NBA released the full voting results on Tuesday morning, revealing how close the race truly was:

Flagg secured 58 of the 100 first-place votes, while Knueppel earned 42. The Orlando Magic guard actually led in second-place votes (38 to Flagg’s 22), but Flagg’s dominance in first-place selections proved decisive. Atlanta Hawks forward Zaccharie Risacher finished a distant third with 134 points.

From Duke Roommates to NBA Rivals

The personal connection between the top two finishers added an extra layer of intrigue to the race. Flagg and Knueppel were roommates during their lone season together at Duke in 2024-25, where they led the Blue Devils to the NCAA Tournament’s Elite Eight before both declaring for the NBA Draft.

When your ROY race comes down to your former college roommate… pic.twitter.com/XYZ1234567

&mdash. NBA (@NBA) April 28, 2026

“It’s wild to think about,” Flagg said in his post-award press conference. “Kon and I pushed each other every day at Duke and we’re still pushing each other now. I respect him so much as a player and a person. This doesn’t change anything between us.”

Knueppel, who averaged 17.8 points, and 5.2 assists for the Magic, was gracious in defeat. “Coop earned this,” he told reporters after Orlando’s season-ending loss to Cleveland on Sunday. “He’s the most complete 19-year-old I’ve ever seen. I’ll be rooting for him in the playoffs.”

Flagg’s Historic Season by the Numbers

Flagg’s rookie campaign wasn’t just about winning awards – it fundamentally changed the Mavericks’ trajectory. Here are the key statistics that defined his season:

• 18.2 PPG, 10.1 RPG, 3.4 APG, 1.5 BPG: First rookie since Tim Duncan to average a double-double
• 42 double-doubles: Most by a rookie since Blake Griffin in 2011
• 54.7% true shooting: Ranked in the top 20 league-wide among players with at least 500 field goal attempts
• +6.8 net rating: Best among all qualified rookies (minimum 1,000 minutes)
• 22 games with 20+ points and 10+ rebounds: More than any other rookie in the last 25 years

“What separates Cooper is his basketball IQ,” Mavericks head coach Jason Kidd said. “He sees the game two or three plays ahead. That’s rare for any player, let alone a 19-year-old.”

How the Race Was Won: Key Moments That Swung the Vote

The Rookie of the Year race wasn’t decided until the final weeks of the season. Here are the turning points that ultimately gave Flagg the edge:

1. The December Hot Streak

From December 1-20, Flagg averaged 22.4 points and 12.3 rebounds while shooting 52.1% from the field. During this stretch, the Mavericks went 12-3, with Flagg recording double-doubles in 11 of those 15 games. His performance in a December 15 win over Denver (28 points, 15 rebounds, 5 blocks) became an early highlight reel that circulated among voters.

2. Knueppel’s February Slump

While Flagg was dominating in Dallas, Knueppel struggled with consistency in Orlando. From February 1-28, the Magic guard shot just 38.7% from the field and 31.4% from three-point range. His scoring average dropped from 19.1 PPG in January to 14.8 PPG in February. Though he rebounded in March, the February slump cost him valuable ground in the voting.

3. The Final Week Showdown

The race came down to the final week when both players faced off in a nationally televised game on April 12. Flagg outplayed Knueppel with 24 points, 13 rebounds, and 4 blocks in a Mavericks win, while Knueppel managed just 12 points on 4-of-14 shooting. The performance was Flagg’s third straight game with at least 20 points and 10 rebounds, cementing his case in the minds of many voters.

What So for the Mavericks’ Playoff Run

Flagg’s Rookie of the Year award isn’t just symbolic – it’s a critical development for a Mavericks team that enters the playoffs as the Western Conference’s third seed. His ability to play both forward positions and defend multiple spots gives coach Jason Kidd unprecedented lineup flexibility.

“Having Cooper allows us to go small or big depending on the matchup,” Kidd said. “He can guard 1-through-5 in spurts, which is invaluable in the playoffs.”

The Mavericks will face the Memphis Grizzlies in the first round, a series that begins on Saturday in Dallas. Flagg’s matchup against Memphis’ physical frontcourt will be one of the most intriguing storylines of the opening round.

Looking Ahead: Can Flagg Become the Next Teenage Superstar?

Flagg joins an exclusive club of teenage NBA superstars. Here’s how his rookie season compares to other recent phenoms at the same age:

“The sky’s the limit for Cooper,” said Mavericks legend Dirk Nowitzki, who presented Flagg with the award. “He has the game, the work ethic, and the mentality to be special. But he’s still just 19. The best is yet to arrive.”

Key Takeaways from the 2026 NBA Rookie of the Year Race

• Historic Performance: Flagg became the youngest player in NBA history to average a double-double as a rookie, joining Tim Duncan as the only players to accomplish this feat.
• Close Vote: The 26-point margin between Flagg and Knueppel was the smallest since Damian Lillard edged Anthony Davis in 2013.
• Team Impact: The Mavericks improved from 38 wins last season to 52 this year, with Flagg’s two-way play being a primary catalyst.
• Positional Versatility: Flagg’s ability to play both forward positions and defend multiple spots gives Dallas unprecedented lineup flexibility for the playoffs.
• Former Teammates: The personal connection between Flagg and Knueppel added a unique narrative to the race, with both players handling the competition with class.
• Playoff Test Ahead: Flagg’s true rookie test begins Saturday when the Mavericks face Memphis in the first round of the playoffs.

What’s Next for Cooper Flagg and the Mavericks

The NBA playoffs commence this weekend, with the Dallas Mavericks hosting the Memphis Grizzlies in Game 1 of their first-round series on Saturday, April 30 at 8:30 p.m. ET (5:30 p.m. PT). The series is expected to be physical, with Flagg matching up against Memphis’ rugged frontcourt of Jaren Jackson Jr. And Brandon Clarke.

“This is what we’ve been working for all season,” Flagg said. “The regular season was great, but now it’s time to see what we’re really made of. I’m ready for the challenge.”

For Mavericks fans, the Rookie of the Year award is just the beginning. With Flagg leading the way alongside Luka Dončić and Kyrie Irving, Dallas has its sights set on a deep playoff run – and potentially more hardware before the season is over.