By Daniel Chavkin The ESPN radio hosts are preparing for a two-on-two challenge. View the original article to see embedded media. Jay Williams and Keyshawn Johnson are preparing to play Bart Scott and Alan Hahn in a two-on-two basketball game next week, after Scott and Hahn set forth the challenge. Johnson and Williams seem to have an advantage, as they have the only former basketball player participating along with another professional athlete. They have been practicing one-on-one to prepare, but things didn’t go as planned in their latest practice. While practicing on the court at Duke Unive…