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