A piece of Cooper Flagg‘s historic rookie season with the Dallas Mavericks just commanded a massive price.
A game-worn Flagg jersey that included his record-setting 35-point performance against the Los Angeles Clippers sold through Heritage Auctions on August 22 for $329,400, including buyer’s premium. The six-figure result came less than nine months after Flagg wore the jersey during a three-game Mavericks road trip, and it more than tripled the price another important Flagg jersey fetched at Heritage earlier this year.
The price alone turns heads. The story attached to the jersey helps explain why a buyer was willing to go that high.
Cooper Flagg Jersey Was Worn During 3 Mavericks Road Games
According to Heritage’s listing, the white Mavericks Association Edition No. 32 jersey was photo-matched by MeiGray to three games: November 28 against the Los Angeles Lakers, November 29 against the Clippers and December 1 against the Denver Nuggets.
Heritage noted that Flagg wore two jerseys in each game.
The centerpiece was the Clippers matchup.
Flagg erupted for 35 points and eight rebounds while shooting 13-of-22 from the field in Dallas’ 114-110 win at the Intuit Dome. At 18 years and 343 days old, he became the youngest player in NBA history to score at least 35 points in a game, breaking a mark previously held by LeBron James, who had done it at 18 years and 348 days.
There is also a physical detail connecting this particular jersey to the milestone.
Heritage said its size tag carries the handwritten notation “11/29 2nd Half – 35 PTS.” The lot came with a photo-matching letter from MeiGray, a certificate of authenticity from the Mavericks and a Heritage Auctions letter of authenticity. Heritage also said Dallas was giving the winning bidder the option to have Flagg autograph the jersey in November.
The same jersey had already been on Flagg’s back for another unusual performance one night earlier. Against the Lakers, the rookie recorded 13 points, 11 assists and seven rebounds. He then wore it against Denver on December 1 while producing 24 points and eight rebounds in a 131-121 Dallas victory.
$329,400 Sale Dwarfs Price of Flagg’s First NBA Jersey
The auction becomes even more striking when compared with another important piece of Flagg memorabilia sold by Heritage.
In February, the jersey Flagg wore during his first NBA game action at the 2025 Las Vegas Summer League sold for $100,650. That jersey had a compelling claim of its own: Heritage described it as the first NBA jersey Flagg ever wore in live competition.
The latest jersey brought approximately 3.3 times as much.
The two lots are not identical collectibles, so the prices should not be treated as a controlled measure of Flagg’s memorabilia market. But the gap illustrates what the newer jersey carries that the Summer League shirt could not: an authenticated connection to one of the first signature performances of Flagg’s NBA career.
And what looked historic in November only became more meaningful as the season unfolded.
Flagg went on to win the 2025-26 NBA Rookie of the Year Award, averaging 21.0 points, 6.7 rebounds and 4.5 assists over 70 games. He continued breaking age-related scoring records after the Clippers performance, eventually posting even bigger scoring nights as his rookie year progressed.
That gives the $329,400 jersey several layers of significance: it comes from Flagg’s Rookie of the Year season, was worn in three documented games and can be tied directly to the night he erased one of James’ teenage scoring marks.
Fifty-seven bidders and registered phone bidders participated in the Heritage lot before the jersey sold.
For whoever ultimately landed it, the purchase was not simply a Flagg rookie jersey.
It was the one he wore when one of the NBA’s most anticipated young players first put his name ahead of LeBron’s in the record book.
Cooper Flagg Mavericks Jersey Sells for Massive Sum After NBA History