What is a four-seam fastball in baseball?
A four-seam fastball is a fastball that’s thrown by a pitcher for the purpose of maximizing the velocity. It’s known in baseball circles that when you throw with four seams, the ball is going to stay straighter. It’s not going to move very much because of the way the ball’s thrown. But the idea is that it has more power behind it, and so therefore it focuses more on power than movement.
