Casey Barner turned in a true statement performance at Rivals Camp Atlanta. The Powder Springs (Ga.) McEachern impressed in position drills and was dominant during 1-on-1’s. Barner consistently shut down shifty wide receivers in man coverage, particularly impressive for a compactly built safety. He showed excellent polish and feet in coverage, effortlessly transitioning out of his backpedal, flipping his hips, and running stride for stride with receivers on vertical routes. Barner was in-phase for the majority of his reps, shadowing the receivers. Perhaps his best rep of the day came on one of the few occasions where he wasn’t in…