Fall Camp Primer: Defensive Backs

Surprised to see Thompson or Turner on the field in the Nickel, considering how much Nickel we've played the last few years and the fact Evans played significantly more than either of them a year ago as the 3rd safety when Vacarro shifted down, but maybe that's because we won't play nearly as much traditional Nickel this year with a healthy Cobbs at outside linebacker. I'd rather see one of the corners come on the field and Vacarro stay at safety. How do you see it, Bobby?