same basic two shaft layout may be used without the shock absorbing function by replacing one of the linear shafts with a shaft threaded half left hand half right hand as the shaft is turned the motors would both move in or out from the center position this provides a convenient way to quickly adjust the size of the ball gap fig2 rectangular grid rectangular grid of pitches provides a multitude of pitches which can be selected by single touch fig2 polar grid polar grid of pitches provides a multitude of pitches which can be selected by single touch polar layout provides graphical representation of which direction ball will curve fig2 defensive screen place machine at home plate then a single touch positions machine to throw to indicated location on field user can select ground balls fly balls or line drives fig2 specific pitcher screen users can create custom pitchers each with a picture a top speed and a set of pitches each of these pitches can be customized to exactly match real or fictional pitchers using same parameters as screen 1 u2014 pitch speed spin direction spin amount machine can be provided to customer with a library of these pitchers or users can create their own because the machine aim is automatically calculated based on the pitch parameters the trial and error method of aiming the machine of prior art is eliminated referring generally to the figures a game ball feeder is shown and generally designated by the numeral 6 the game ball feeder 6 is for delivering balls.