Abstract: Protective covers for preventing damage to ball bats during batting practice are comprised of an impact force absorbing elastic sleeve which has through its length bore and a V-shaped notch extending forward from a rear transverse edge of the sleeve, dividing a rear length of the sleeve into opposed flaps, thus providing an enlarged entrance opening which facilitates insertion of a bat into the sleeve bore. A strap extending radially from one flap is releasably attachable by a closure fastener to the other flap, enabling the flaps to be cinched around and secured to a bat inserted into the sleeve bore. The protective covers may optionally have weights and/or friction strips positioned within the sleeve, and may optionally include an inertial sensor or impact force sensor and radio transmitter for transmitting signals representative of bat motions or impact forces exerted on the bat.

Abstract: A weight apparatus is provided. The apparatus may be attached to a sports device, such as a baseball bat or other device which may be swung by a user. In one configuration, the apparatus has a body portion that at least partially surrounds a portion of the swingable device. As an example, the body portion may act as a sleeve surrounding an end of the device opposite the end of the device which is gripped by the user. The apparatus also has a weighted portion, which is coupled to the body portion. The weighted portion is disposed at least partially adjacent an end of the swingable device. In certain configurations the apparatus has a center of balance between a midpoint and one end of the apparatus. In certain cases, the weighted portion distributes weight closer to a distal end of the swingable device, in order to assist a user in warming up or otherwise training with the device.