Former Duke star Cooper Flagg joined the Dallas Mavericks as the No. 1 overall pick in the 2025 NBA Draft. Photo by Sara Yenesel/EPA

Aug. 11 (UPI) -- A coveted Cooper Flagg one-of-one rookie debut patch autograph card was found in Rhode Island after the Dallas Mavericks offered an enticing haul to whoever found it.

RhodyBreakers, a division of Baseball Cards of Rhode Island that opens card packs on live streams, revealed the prized card Monday for a client identified as Jason Williams.

"Unbelievable," RhodyBreakers wrote on Instagram. "What a night. What a break!"

Flagg signed the Topps card, which includes a patch from the jersey he wore during his Oct. 22 NBA debut, on July 17 at Fanatics Fest. On Thursday, the Mavericks announced a "bounty" they would provide to whoever gave them the card in a trade.