Looking over some of the more controverial grades, here are my thoughts.
Jed Lowrie: everyone thinks I'm overrating him at A-. I can see a drop to B+ logically. HOWEVER, my instincts are screaming "leave him at A-," and right now I'm inclined to play intuition on this one and stick to my guns.
Austin Jackson: B- is a notch to low. Have changed him to B.
Todd Frazier: B+ was a notch too high. Have changed him to B.
Alan Horne: No change yet. Will probably stay at Grade B.
Chris Lubanski: will probably drop to C+.
John Mayberry: dropping from B to B-.