Ryan Mathews concedes Week 1

Ryan Mathews has admitted what everyone else has long thought -- he will not be ready to play Monday when the Chargers open the season at Oakland.

The injured Chargers’ running back told U-T San Diego that he no longer thinks he can get ready in time for the game, and he is now focusing his attention on playing Week 2 at home against Tennessee.

"I haven't been cleared for contact, and I think we're just going to wait this week," Mathews told the paper. "I'm just going to keep doing what I'm doing. ... I just have to have the mindset right. I probably won't be playing in this game. But the next game, that's what I'm looking for now. I don't know about the team, but me personally, now I'm looking for that (Week 2) game against Tennessee."

Give Mathews credit for being steadfast in his determination to get on the field, but it has been clear that he just didn’t have enough time to prepare for the Oakland game. He has been practicing on a limited basis, but he hasn’t been cleared for contact. Mathews broke his clavicle Aug. 9 on his first carry of the preseason. Ronnie Brown is expected to start at Oakland with Le'Ron McClain and Curtis Brinkley also getting carries.

Meanwhile, will Oakland's Stefen Wisniewski play guard on Monday night? He has been expected to be the center, but he has missed the preseason with a calf injury and Alex Parsons has done a solid job at center. So, for at least, the time being, there is a chance both could be on the field.