The Cowboys no longer alternate Marion Barber and Felix Jones by series. They will often alternate them from one play to the next. Over the last four games, Barber has 62 carries for 263 yards while Jones has 49 carries for 258 yards. "It confuses them, I think," Jones said of defenses. "It's hard to focus on one running back and another one coming in. "Me, I don't play defense, but I figure it's hard. They have to adjust to it, so it helps us out a lot."