Dallas Mavericks rookie Cooper Flagg of Newport works out March 6 before the first game in Boston of his NBA career at TD Garden in Boston. (Derek Davis/Staff Photographer)Members of a Rhode Island retail shop that rips open boxes of trading cards on live streams pulled the one-of-one numbered rookie debut patch Cooper Flagg card. The Dallas Mavericks on Aug. 6 offered a bounty for the card, including season tickets and autographed Flagg memorabilia. The card features a game-worn patch from the jersey Flagg wore in his NBA debut on Oct. 22, 2025. According to ESPN, the highest amount paid for any Flagg card so far is $366,000, which came in a March auction.