The Chargers’ defense was last in the league in 2011 on third down. They allowed opponents to convert 96 of 195 opportunities. Coach Norv Turner promised third-down defense would be a focus this offseason. Through OTAs and minicamp the majority of snaps have simulated third-down situations. The defense dominated on third down Wednesday night. CB Antoine Cason attributed the strong performance to the additional work. “It helps,” Cason said. Cason also pointed that the secondary has begun to gel with the extra time they have spent working together.