If the Yankees starting rotation is set, then I don’t see an ace of the staff on it . Louis Severino, Masahiro Tanaka, CC Sabathia, James Paxton and J.A. Happ are all very good pitchers, but none of them dominate every time out. The Red Sox have Chris Sale and Houston has Justin Verlander, and they are both the clear cut aces of their pitching staffs. Yankees improved their starting rotation, but not by much. Yankee fans should hope they aren’t done shopping.