The Dallas Cowboys have to shake up their offensive line rotation in the second week of training camp, as one of their offensive guards went down with an injury that will keep him on the sidelines through the start of the regular season. Robert Jones broke a bone in his neck during practice on Sunday, and is expected to miss two to three months, per ESPN. The Middle Tennessee product signed a one-year deal with Dallas in free agency after spending his first four NFL seasons with the Miami Dolphins. Last year, he started in all 17 games at left guard for Tua Tagovailoa.