The San Francisco 49ers announced today that tackle Anthony Davis and tight end Vance McDonald are ruled out for Sunday's game against the Oakland Raiders.

Davis is still recovering from a concussion he suffered in Week 11 against the New York Giants. McDonald is recovering from a back injury.

Also ruled out is nose tackle Glenn Dorsey, who is still trying to comeback from a torn biceps muscle.

Cornerback Tramaine Brock (hamstring) and safety Bubba Ventrone (groin) are listed as questionable.