There was a story the other day (ESPN?) about the Royals to the effect that they are working a program to try and improve their pitchers' health - one the things they are pushing is to get their pitchers to use more change of speed to their advantage - i.e. don't throw max effort all the time. I could only think of Skubal as I read that and wished it was something he would do. I've always tended to the belief that one of the reasons JV lasted so long was that he used his top end judiciously early in his career - always a lot of variation within his 4 seam fastball - though in a recent interview I saw, even JV himself has wondered whether he would be able to have the same success pitching the way he did when he came up if were coming up today.