Arkin had never snapped the ball for the Dallas Cowboys before getting to training camp two weeks ago. When the Cowboys play their preseason opener Monday night at Oakland, there is a distinct possibility Arkin could be snapping for quarterback Tony Romo.|||||||
Starting center Phil Costa missed practice Saturday because of a lower back injury that forced him out of practice the previous day. He was getting an MRI. Arkin, a fourth-round draft pick in 2011 who didn't play at all last season for the Cowboys, was working with the first-team offense Saturday.