Clayton is expected to help with the depth issues the Raiders have at linebacker as well as special teams. He played two seasons for the Eagles after he was chosen in the fourth round out of Oklahoma in the 2010 draft.
He played mostly special teams over those two seasons appearing in 21 games with one start.
The 6-2. 230 pound linebacker played four seasons at Oklahoma, starting nearly every game his junior and senior season. He was named All-Big 12 second team by Phil Steele and honorable mention by Ap and coaches following his senior year.
The Raiders currently have just one weak side linebacker on the team in rookie Miles Burris. Aaron Curry was placed on the physically unable to perform list with a knee injury which means he can return after week six of the season if he is ready by that time.