Are we going from a coach who doesn’t use any running backs to a coach who uses two? Pat Shurmur says yes. Shurmur, Chip Kelly’s new offensive coordinator, said Monday that he plans to give both LeSean McCoy and Bryce Brown a generous number of carries moving forward and said he thinks in general, offenses are more effective with two running backs in the mix. McCoy, the Eagles’ 2011 Pro Bowl tailback, managed only 840 yards in 12 games in a concussion-shortened 2012 season. Brown had games of 178 and 169 rushing yards when McCoy was hurt but lost three fumbles in those two games. Can they co-exist? Shurmur says no question about it. “I think it’s important that you use more than one running back,” Shurmur said. “It’s a long season, and a guy can run out of gas quickly. “If you have guys who are different, you can use them in different ways, and you try to play to their strengths. I think that’s important. “I’ve always believed there’s a place on the roster for two good running backs. You have your starter, but the other guy needs to play so they can all get through the season.”