I think CC would save at least 85% of his opportunites, which would make him upper echelon closer. I would say that the loss of CC from the starting rotation would be too much too overcome.
Adam Miller might be an interesting option as closer. I'd rather have a starting rotation of CC, Lee, Westbrook, Sowers and Miller...
as it would create an alternating blend of speed and finesse.
But if Byrd is still in the starting rotation mix and Miller is not, I'd like to see Miller tried as closer.
