The Chargers are attempting to alter the running style of Ryan Mathews in an effort to keep him healthy. “He’s a very physical runner,” Norv Turner said. “He initiates collisions a lot, and we can help him in that way and just continuing to get on the boundary and get out of bounds and some of the things when the play’s dead, let it end.” LaDainian Tomlinson was increasingly prudent with when to avoid contact during his tenure with Chargers.