Raiders' Jackson carted off with left leg injury

Right tackle Trent Brown signed the richest deal for an offensive lineman in league history at $66 million over six years this offseason.With Jackson out, the Raiders rotated Denver Kirkland and new swing guard/backup center Jordan Devey at right guard with the starters for the rest of practice.The Raiders are already thin at guard, with left guard Richie Incognito set to serve an NFL-mandated two-game suspension to begin the season and Denzelle Good out for at least two months following offseason back surgery.Jonathan Cooper, who will start in place of Incognito to begin the season, could potentially move to right guard should Jackson be out an extended amount of time."We'll have to put our heads together to take a look where at we're going, if we need to," Gruden said.To help make this website better, to improve and personalize your experience and for advertising purposes, are you happy to accept cookies and other technologies?