Abstract: There is disclosed a versatile pitcher training and proficiency device which is focussed upon learning and thoroughly conditioning proper throwing arm motion through ball release and followthrough, as distinct from accuracy and control training to throw a ball to a particular location in a strike zone, for example. A lightweight and readily portable framework and surface supporting members provide specific targets for the hand of the throwing arm during its arc of movement. Adjunct means locates a pitching rubber zone to facilitate accurate training. The device is adjustable for various pitcher physiques, pitching styles, and techniques.