Follows the Boston Red Sox' Tim Wakefield and the New York Mets' R.A. Dickey - the only two major league pitchers who use the unpredictable knuckleball - during the 2011 season.
The movie's a must for baseball fans in general and Red Sox fans in particular - if nothing else, it will help remove the battery-acid taste of the season now stumbling to a close.
Some of Knuckleball!'s best scenes show Dickey and Wakefield hanging out with Hough and Phil Niekro (the latter the rare knuckleballer who threw the pitch his whole career rather than turning to it out of desperation), talking about the mechanics and the mojo of the knuckler.