PG PBR and any college camp all measure it. The pools of talent MLB scouts look at have already been weeded out from those with weak measurables. Figuring out ev from a tee is useful as a comparison tool, and a progression stat. Gained 5 ev in a year? Studies say you can hit the ball 25 feet further, and those grounders in the hole might get through. Good luck finding me a player at a P5 with below an 88 ev from a tee.