IRVING, Texas -- When word came that the Dallas Cowboys signed Darren McFadden on Friday, many wondered why. McFadden hadn’t averaged better than 3.4 yards per carry in the last three seasons. He has played a full season just once. He has just one 1,000-yard season. According to its analytics, numberfire.com called McFadden the worst running back in the NFL the last three seasons. So there’s that. But there’s also McFadden’s pedigree.
