Image taken from: http://lennon.csufresno.edu/~nas31/nsa/pballIntro1.html
An important force often overlooked when analyzing a spinning projectile, the Magnus Effect (also referred to as the Robbins effect) is when
a "rapidly spinning ball develops another force at right angles to the spin axis," This force often causes what's known as a lift force, allowing
the ball to continue it's flight path and possibly gain trajectory, giving it a farther distance.
As seen from the above diagram, you can see the flow lines of air on the ball as it travels through the air. The air on top is flowing faster than the air on the bottom of the ball,
causing a spinning effect due to the "net change in air pressure between the top and the bottom of the ball,".