Nnamdi Asomugha will miss the season opener against the San Diego Chargers with chipped bone in his left wrist, ESPN reported Tuesday morning. Asomugha will miss Thursday's preseason finale against Seattle as well as Oakland's season opener on Sept. 14 against the Chargers. Citing a Raiders team source, ESPN Asomugha will be sidelined two weeks but there's concern that his injury will be bothersome throughout the season.