what does the term knuckleball mean in baseball
Tim Wakefield in his throwing motion, showing his grip of the knuckleball. A knuckleball or knuckler is a baseball pitch thrown so as to minimize the spin of the ball in flight, causing an erratic, unpredictable motion. The air flow over a seam of the ball causes the ball to transition from laminar to turbulent flow. This transition adds a deflecting force on the side of the baseball.