A second experienced defensive back is leaving the Wisconsin Badgers football team. Redshirt sophomore Patrick Johnson had to deal with illness during preseason camp, then missed the opener with a concussion. Johnson was on the team’s depth chart as the number-three safety. The Badgers announced he has left the team this week. Another experienced defensive back, redshirt sophomore cornerback Dontye Carriere-Williams left the team last week. Johnson had played 13 games as a freshman in the 2016 season but was limited to four last year by a shoulder injury.