How do you throw a 3 seam fastball?

Answer 1

well first hold the ball on the narrow seams, then u will see your thumb without touching the seams. when u throw the ball throw it however u want to. if u want more movement put presure on your index finger.

Answer 2

ti cant tell you how to throw a 3 seam fastball but i know a website that will www.webbball.com or something like that then you click fastballs and they will have the three seam fastball