Washington Redskins cornerback David Amerson, right, covers tight end Deangelo Peterson during a rookie minicamp practice session at Redskins Park on Sunday, May 5, 2013, in Ashburn, Va. (AP Photo/Evan Vucci Stock
Washington Redskins cornerback David Amerson, right, covers tight end Deangelo Peterson during a rookie minicamp practice session at Redskins Park on Sunday, May 5, 2013, in Ashburn, Va. (AP Photo/Evan Vucci Stock
Washington Redskins cornerback David Amerson, right, covers tight end Deangelo Peterson during a rookie minicamp practice session at Redskins Park on Sunday, May 5, 2013, in Ashburn, Va. (AP Photo/Evan Vucci Stock
Washington Redskins cornerback David Amerson, right, covers tight end Deangelo Peterson during a rookie minicamp practice session at Redskins Park on Sunday, May 5, 2013, in Ashburn, Va. (AP Photo/Evan Vucci Stock
Washington Redskins tight end rookie, Chris Cooley makes a 12 yard reception against the Miami Dolphins as Dolphins Antuan Edwards reaches for a tackle in preseason action at Pro Player Stadium in
Washington Redskins cornerback David Amerson, right, covers tight end Deangelo Peterson during a rookie minicamp practice session at Redskins Park on Sunday, May 5, 2013, in Ashburn, Va. (AP Photo/Evan Vucci Stock
Washington Redskins tight end rookie, Chris Cooley makes a 12 yard reception against the Miami Dolphins as Dolphins Antuan Edwards reaches for a tackle in preseason action at Pro Player Stadium in