Ryan Mathews in better shape

Chargers RB Ryan Mathews says he's in better shape now than he was at the start of training camp last year, when he failed the initial conditioning test.  “Huge, huge difference," Mathews said.  "I’m in way better shape this time than I was last year and I just feel good about myself. I had a great offseason and great OTAs and mini camp, so I'm about to blow it away."  Despite showing up to camp out of shape last year -- and sharing touches with RB Mike Tolbert -- Mathews still posted 1,546 total yards, 6 TDs, and a 7th-place fantasy finish.  Now in prime condition, and with the backfield to himself, Mathews has the upside to finish atop the RB heap.