[header] How to throw a faster fastball [title] Perfect your grip. [step] There are two primary grips for the fastball: the four-seam and the two-seam. The four-seam generally gathers more velocity but some pitchers find the two-seam more comfortable and easier to command. 
Many experienced pitchers will switch between the two options when they want to emphasize velocity or movement respectively but you should stick with one until you're fully comfortable with it. [substeps] For the four-seam grip, place your index and middle fingers across the seams where they form a horse-shoe shape with a comfortable amount of space between them.