If Gray performs as well over the next five years as the pitcher who did the best of any of the ten pitchers he was most similar to thru the end of last year, he would produce a net WAR during that time of 10.3.
It would not be at all difficult for Hendricks and Baez to far exceed that over the next five years, with Torres also looking as if he ha an excellent chance of being a serious contributor at the major league level.