Paul Guenther is the new defensive coordinator for the Raiders. Guenther spent the past four years as the Cincinnati Bengals’ defensive coordinator. Guenther, 46, worked with the Bengals from 2005 to 2017. He will call defensive plays in 2018, a role that Ken Norton Jr. handled the first 10 games last season before being fired. Guenther expressed his interest in working with Raiders defensive backs Gareon Conley and Obi Melifonwu. “I really like both of them,” Guenther said. "(Conley) was probably my favorite corner coming out last year." "We just need to get these guys on the grass, keep them healthy and teach them the system," Guenther said.