Overview
The knuckleball is thrown by pushing the ball with fingernails or fingertips to minimize spin. The reduced spin causes air resistance to produce unpredictable lateral and vertical movement, making it extremely difficult for both batters and catchers to handle. While MLB has seen dedicated knuckleball specialists like Phil Niekro and Tim Wakefield enjoy long careers, the pitch remains exceedingly rare in NPB. Hardly any Japanese pitcher has built a career primarily around the knuckleball. Hanshin's Kazuyuki Yamamoto incorporated it for a time, and Yakult's Hiroshi Yamanaka later added it to his repertoire, but neither relied on it as a primary weapon. The pitch travels at around 100-120 km/h, disrupting batter timing through its slow speed and erratic movement, though it is hard to control and carries the risk of more walks.