It’s no secret that GM Howie Roseman doesn’t value the running back position. Just over a year ago, the Philadelphia Eagles won the Super Bowl with a three-headed running back formation of LeGarrette Blount (formerly undrafted, signed to a one-year deal), Jay Ajayi (midseason trade acquisition), and Corey Clement (undrafted rookie). This past year, the Eagles’ leading rusher was undrafted rookie Josh Adams, who didn’t even emerge as the brief…