4. The youth movement is real. There was — and still is — a lot of talk about just how good last season’s rookie class was. They were historically good. Youth really does dominate the landscape of baseball these days. Only four of the top twenty players in fWAR this season are thirty or older. Or, in other words, sixteen of the top twenty players in fWAR are under the age of thirty. The oldest player in the top twenty is Robinson Cano, who is currently thirty-three years old. What’s more, eleven of the top twenty players are twenty-five or younger. Youth rules.