Dallas Cowboys fans could see Deuce Vaughn play multiple positions when the 2024 NFL season kicks off. After a training camp practice on Wednesday, Cowboys head coach Mike McCarthy was asked about the plan for the former Kansas State running back. “I’ve been trying to cross-train some of our younger players, Deuce is one of them, the ability to play both in the backfield and out of the backfield,” McCarthy said. “He’s always been featured more in a one-back offense, and we’re obviously dabbling in some of the two-back, but his ability to play in the empty sets too. Just trying to cross-train h…