How to throw a spitball<br>Put a small amount of saliva or vaseline on the baseball. The object is to create resistance and a change in the uniform weight of the ball to make its motion more unpredictable and difficult to hit. There's no " right place " to put it, since the object is unpredictability, as with a knuckleball.
Vaseline creates resistance on the ball
( z1 create :ARG0 ( z2 product :name ( z3 name :op "Vaseline" ) ) :ARG1 ( z4 resist :location ( z5 ball ) ) )