Many pitchers - especially supinators (get around the ball well, usually have good natural curves and sliders) will unintentionally cut their fastballs, robbing them of velocity and vertical and arm side movement. Most don’t realize how simple the solution is - more release extension. More extension = more time for the hand/arm to transition from supination to pronation. Does this mean you shouldn’t throw a cut fastball, no. But you should know how not to in order to reach higher velocities with