The following is an experiment. I wanted to see if hitter exit velocity (EV) drops and by how much when a batter players through an injury. I am not sure before starting it where it would head and after a small stab at the data, I seemed to end up with more questions than answers.
The following may sound like a scientific study and in many ways, it is one. I am trying to take a theory and find a solution. Let me start with the theory.
First, injured players perform worse while playing through injury. I have tackled this idea as I looked back at the players’ stats the season before, of, and after the injury.
Talking to several hitters, they say they know when something is bugging them. They just can’t get hit the ball as hard as when they are healthy. Instead of trying to figure out if a player’s slump is from bad luck or injury, we have StatCast’s exit velocity to help us see if they are hitting the ball as hard.