Rashean Mathis thinks Lions’ defense can be better this year

Can the Lions’ defense get better despite the loss of its best player, Ndamukong Suh? Cornerback Rashean Mathis thinks so. “That’s definitely the plan,” Mathis told the Detroit Free Press. “Anything other than that wouldn’t be us. It wouldn’t be what we’re building for. Like I said, we started something but we know that consistency…