MADISON, Wis. — Former NFL head coach Jack Del Rio was arrested by Madison police for operating a vehicle while intoxicated and will step down from his role on Wisconsin’s coaching staff, coach Luke Fickell announced Monday. Del Rio — the former head coach of the Jacksonville Jaguars and Oakland Raiders, and defensive coordinator and interim head coach for the Broncos — had joined Wisconsin’s staff in August as a senior adviser to Fickell. Madison police said Del Rio was arrested early Friday for a first-offense OWI after a vehicle hit a stop sign and broke a fence before resting in a yard.