I agree that your shutter speeds should have eliminated any blur from camera shake at those focal lengths. However, it looks like your auto focus just missed a bit, and you probably should have stopped down to f/8 for both deeper depth of field and I suspect that your lens is probably sharper at f/8 as well. Finally, I wouldn't use AF-S for a moving subject unless it is only lateral movement that wouldn't change the distance between you and the subject.