I love knuckleball pitchers. The knuckleball was one of the first pitches my dad showed me how to throw, and it was one of the first I showed my son. I always thought that it would have been a good vehicle to getting into the pros! Seeing the success of R.A. Dickey has me thinking I should start practicing it again, who knows? Here's a little about the physics of knuckleballs and why they are so unpredictable. I'm not familiar with the pitcher in the clip below, but he has some nasty movement on his knuckleball.