The disclosure relates to a baseball pitcher training apparatus for training a pitcher in controlling his lower and upper body portions in the movement sequence of the human body associated with throwing a baseball during the pitch preparation phase as well as the delivery and follow-through phase to conserve stress or strain in the arm and leg muscles. The apparatus has a pitching mound and a frame structure comprising two vertical post assemblies connected at the top by a horizontal cross beam assembly. Light bag weights are suspended from the cross beam assembly. The pitcher learns his body mechanics from following a pitching line indicated by the light bag weights and gauging his position by calibration marks on the pitching mound.