Knuckleball is a documentary about the impossible-to-hit pitch. This heartfelt, funny and engaging film delves into the legendary subculture of the knuckleball and the brotherhood of men who share the drive, imagination and humility to throw baseball’s slowest, unpredictable and most disrespected pitch: R.A. Dickey, Tim Wakefield, Phil Niekro, Charlie Hough, Wilbur Wood, Jim Bouton and Tom Candiotti.