In baseball, the knuckleball is quickly disappearing - The Washington Post

Tim Wakefield, knuckleballer who made his pitches dance, dies at 57 - The Washington Post

Enjoy Dickey, knuckleball while you can

Knuckleball! (2012) - IMDb

Engineering students build a knuckleball throwing machine - NBC Sports

The Rays and the return of the Knuckle Ball - DRaysBay

George Kirby throws knuckleball for first time in game

Why the knuckleball takes such a knucklehead path

Pitcher Matt Waldron continues knuckleball transformation as San Antonio Missions open Double-A season

Will R.A. Dickey's Angry Knuckleball Change The Game?

Why are there no knuckleballers in professional baseball anymore? Is it a physiological issue, the difficulty catching a knuckleballer, or something else? - Quora