Knuckleball, the new documentary from Ricki Stern and Annie Sundberg, is about a small group of athletes who’ve gone against the grain. Just a handful of pitchers in the century-plus history of Major League Baseball have relied on the famously unpredictable knuckleball, a pitch that doesn’t spin yet darts every which way. Stern and Sundberg followed two of these guys—Tim Wakefield, of the Boston Red Sox, and the New York Mets’ R.A. Dickey (above)—for the duration of 2011 season. Significantly lighter than the Manhattan-based filmmakers’ previous documentaries—The Devil Came on Horseback was about the genocide in Sudan; The Trials of […]