Pitch speed. Used to be it was mostly closers that threw that, but some starters, like Strider, throws 100mph regularly. I personally think that’s just not sustainable over 5+ innings without risking injury. I prefer the pitchers with finesse over power. Just my .02
Pitch speed has changed because the radar picks up the pitch 5 feet from release whereas before it was 5 feet in front of the plate.
Explain Nolan Ryan if it is about speed.