During the 2013 NFL season, no team ran out of single running back formations more often than the Philadelphia Eagles did. The Eagles used a single back set on 98% of their runs.
One may have figured this number might change to some extent in 2014. The Eagles added Darren Sproles last offseason so there was reason to believe Philadelphia might use some sets with both Sproles and LeSean McCoy. However, that wasn't the case.
According to a study from Football Outsiders, the Eagles once again ranked dead last in this category.