Rookie first round pick (RB) Ryan Mathews is looking good so far this pre-season.  Mathews has carried the ball 34 times for 136 yards (4.0 ypc) and he has caught 5 passes for 33 yards (6.6 avg) so far this pre-season.  The Chargers have not been shy about giving the rock to Mathews this pre-season to get him ready for the grind of his rookie year as he will be the main man in the running game.