The Las Vegas Raiders will be without four more defensive starters for their first game under new coordinator Rod Marinelli.
Coach Jon Gruden says that defensive end Clelin Ferrell will miss the upcoming game against the Los Angeles Chargers with a shoulder injury, and linebacker Nicholas Morrow, cornerback Damon Arnette and safety Johnathan Abram all will be out with concussions.
Defensive tackle Maliek Collins is already on injured reserve with a hamstring injury.