Forkball

Related to the split-finger fastball, the forkball is held between the first two fingers and thrown hard, snapping the wrist.

The result is that the forkball is generally thrown slightly slower than the splitter, but has more of a "tumbling" action akin to the movement of a 12–6 curveball, as it will drop off the plate before it gets to the catcher's mitt.

Joe Bush, a pitcher from the 1910s and 1920s who played for the Philadelphia Athletics and Boston Red Sox, is credited with the invention of the forkball, shortly following World War I.

[3] Roy Face and Lindy McDaniel were relief pitchers who pitched for 16 and 21 years, respectively, in the Major Leagues and were forkballers.

[4] Towards the end of his career, the forkball was adopted by Sandy Koufax, Hall of Fame pitcher for the Los Angeles Dodgers, to make up for lost velocity due to his arm injuries and to replace his seldom used changeup which he considered to be ineffective.