And if you continue reading the Wikipedia page* that it pulls this from, you see, "Modern baseball analysts and fans have started using the term ace to refer to the elite pitchers in the game, not necessarily to the best starting pitcher on each team.[5] For example, the April 27, 1981, Sports Illustrated cover was captioned "The Amazing A's and Their Five Aces" to describe the starting rotation of the 1981 Oakland Athletics." So, enjoy your non-modern, pre-1981, terminology, Grandpa. * Not that I'd really rely on Wikipedia on close decisions regarding baseball terminology.