Part of an offensive coordinator’s challenge is to get his playmakers on the field and get them all the ball. At least we know the first part of the equation should be doable for Jason Garrett. Although receiving is still being sorted out, the Cowboys' good depth at running back and tight end allows him to put some interesting formations to work. First, in the backfield, the team is playing around with using Marion Barber and Felix Jones — something it did sparingly last season when the two were healthy — on the field at the same time. It doesn’t have to be in traditional, two-back sets, either; Jones has the flexibility to split out and motion into or out of the backfield. And at tight end, the team has two plus pass catchers in Jason Witten and Martellus Bennett. Don’t overlook Bennett, who is said to have matured a great deal in his first year with the team. In limited duty, Bennett gained more than 14 yards per catch and had four TD catches, most of them in the second half of his rookie season.