Ultra Rare Cooper Flagg 1-of-1 NBA Debut Patch Autograph Card to be Sold at Auction

Dallas Mavericks star Cooper Flagg's rarest and most-desirable trading card is about to hit the open market.

Fanatics Collect announced Friday that Flagg's gem mint 10, one-of-one, autographed, debut patch Topps Chrome rookie card will be auctioned off on its platform:

The card, which was pulled during a box break earlier this month in Rhode Island, features the debut patch Flagg wore on his jersey during his first NBA regular-season game.

Selected first overall by the Mavs in the 2025 NBA draft out of Duke, Flagg was every bit as good as advertised last season, averaging 21.0 points, 6.7 rebounds, 4.5 assists, 1.2 steals and 1.0 three-pointer made per game en route to being named NBA Rookie of the Year.