The Seattle Seahawks could be without starting safety Kam Chancellor and left tackle Russell Okung for Sunday's game against the Oakland Raiders.

Chancellor (groin) and Okung (calf) were held out of practice Friday and are listed as questionable.

With Chancellor ailing and Jeron Johnson out with a concussion, Seattle only has three healthy safeties on the roster in Earl Thomas, DeShawn Shead and Steven Terrell. Shead would likely start in place of Chancellor if he's unable to play.

Okung will also be a game day decision with Alvin Bailey likely to replace him in the lineup if he's ruled out.