Anyone besides Darby. That supposed professional was bluffed out by an edgy teenager, even after Darby KNEW that his cards were trash, because he cheated to give them to him.
Jotaro: Has a pair of 2s
Darby: Has Full House
Darby also: Knows Jotaro has a pair of 2s
Darby once more: Folds and loses because he was out-bluffed