Raiders place RB Doug Martin on IR, sign DT Corey Liuget

ALAMEDA, Calif. (AP) — The Oakland Raiders have placed running back Doug Martin on injured reserve and signed former Los Angeles Chargers defensive tackle Corey Liuget.

The team also announced Sunday it has signed linebacker Bryson Allen-Williams and released long snapper Andrew DePaola.

The nature of Martin’s injury was not immediately known, but he was used sparingly in the preseason after leading the Raiders with 723 yards rushing last year. The 30-year-old Martin spent his first six NFL seasons with Tampa Bay before signing with Oakland last offseason. He re-signed with the Raiders in May after Isaiah Crowell was lost for the season with a knee injury.

Liuget played his first eight years with the Chargers. He has 24 career sacks, 274 tackles, 20 passes defensed and six forced fumbles.

Allen-Williams joins the team as an undrafted free agent out of South Carolina.

DePaola joined the Raiders last season, and has also had stints with Chicago and Tampa Bay.