A training device intended for use with a ball or object, which is to be retained after striking or throwing, is disclosed. The device employs a retaining pouch which is capable of easily receiving a ball without modification or damage to the ball, yet securely retain same within the pouch and provide sufficient strength to prevent the ball from escaping the pouch during maximal acceleration. The pouch has a plurality of apertures which allow weaving of the tether therethrough and when drawn tight, prevent escape of the ball through the, now closed, end of the pouch. The ball can be easily exchanged by simply releasing the tether and opening the pouch.