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San Diego, CA (SportsNetwork.com) - San Diego Chargers running back Ryan Mathews was ruled out for Sunday's regular-season finale against the Kansas City Chiefs.

Mathews was absent from practice all week with an ankle injury that will keep him out for a third straight game.

Wide receiver Keenan Allen, who missed his last game with a broken collarbone and an injured ankle, was listed as doubtful after not practicing all week.

Punter Mike Scifres remains out with a shoulder injury.

Quarterback Philip Rivers (chest/back), defensive tackle Corey Liuget (ankle) and cornerback Shareece Wright (concussion) are all listed as probable, while guard Chris Watt (ankle) is questionable.