Guyland Leday, the 10-year-old zydeco prodigy from Opelousas, will appear on The Oprah Winfrey Show. It just hasn’t happened yet.

Leday flew to Chicago on April 1 for a rehearsal and taping, but two days before his trip, Leday’s manager, Robby Robinson, said the show’s producers called to say the actual broadcast will be held until an undetermined date.

“I think they want to save it for another time, when they can play it up bigger,” says Robinson...