On offense:
WR Brayden Robinson. He's got speed to burn, and can be the kind of return man we haven't seen since some guy wore #25, assuming that he's recovered fully from that ACL injury.
He was timed at 10.44 in the 100 meter dash, and ran a 4.35 in the 40 yard dash, and actually quite strong for his size.
On defense:
S Joey O'Brien. Assuming he makes a full recovery by the time the season starts, of course. He's too talented to be on the bench, and the staff will have to find some way to get him on the field.
As the season progresses, I think Walton and Osborne are going to get some real reps at RB, and Rodney Dunham is also going to find a way to get on the field as part of a deep DE rotation.