There are a number of ways to throw a knuckle ball. Most notably pitchers can dig their nails or knuckles into the ball, and push the pitch towards the catcher. Unlike most pitches were the fingers lead the way, when a knuckle ball is thrown, the ball leads the way.
R.A. Dickey of the New York Mets in 2012, has had a Cy Young level season by throwing an effective knuckle ball. In the past, pitchers like Tim Wakefield and Hoyt Wilhelm dominated hitters by throwing an effective knuckle ball.
The knuckle ball will dance or float making it hard for the hitter to make consistent contact with the ball. Most effective knuckle ball pitchers will create weak ground balls or fly ball outs.
R.A. Dickey remarkably has been striking out eight or more batters in a number of his starts utilizing a knuckle ball.
Many catchers struggle to catch the knuckle ball, because the ball darts and dances in so many different directions, and they will use a larger glove in order to compensate for this.
It's important that young players not get caught up throwing a knuckle ball. Otherwise, they will not develop a good fast ball, change up, or other important pitches.
The knuckle ball can be mastered by playing catch with friends both on and off the field.
Tim Wakefield was known to have mastered a knuckle ball while warming up as a minor league first baseman for the Pittsburgh Pirates. Without doing so, he would have never reached the major league level.
These are some tips on throwing a good knuckle ball.