Coaching Youth Baseball-Free Drills and Youth baseball Tips for Parents and Coaches

Knuckleball is a dying art. How do you grip a knuckleball...

This is an exerpt from SI..It's really interesting

Yet there is no one way to properly grip the pitch; in fact, there are almost as many different knuckleball grips as there have been knuckleball pitchers. Wakefield uses a two-seam, two-finger grip, with his right pinky flaring off the ball on delivery. Niekro used two fingers, straddling the seam; Charlie Zink, a Red Sox prospect with Triple-A Pawtucket, also straddles the seam, Niekro-style, but uses a part-knuckle, part-fingernail grip. "I actually stick my index knuckle on the ball," he says, "and then my middle fingernail." The hybrid grip is working for him: through Thursday, Zink was 8-2 with a 2.33 ERA and a 1.01 WHIP.

You can read the entire article here
http://sportsillustrated.cnn.com/2008/writers/the_bonus/06/25/wakefield/1.html
It's very interesting