The Cowboys' first-round pick, center Travis Frederick, will begin training camp at that position, but coach Jason Garrett said Frederick could receive snaps at guard given the right opportunities. When the Cowboys begin training camp, first- and second-team left guards Nate Livings and Ronald Leary will be out due to injuries, moving David Arkin to the first team. Depending on how long Leary and Livings are out, the Cowboys will be short-handed along the offensive line for at least a few practices. So the opportunities to move Frederick to guard won't be available.