How to throw a faster fastball<br>Perfect your grip. 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.
There are two primary grips for the fastball: the three-seam and the four-seam.
( z1 grip :quant 2 :ARG1 ( z2 fastball ) :mod ( z3 primary ) :ARG1-of ( z4 mean :ARG2 ( z5 and :op ( z6 three-seam ) :op ( z7 four-seam ) ) ) )