How does a 4 seam fastball move?

The fastball (also called hummer and other names) is the most common type of pitch in baseball. Some "power pitchers," like Nolan Ryan, Roger Clemens and Satchel Paige have thrown it at speeds of...

Spread your four fingers evenly across the top of the baseball, your thumb should be on the bottom. http://hawk4thehall.blogspot.com/

Only a few mph. the big advantage is they tend to sink less at the plate. See forum below.

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