Abstract: A golf club grip assembly has an upper grip fixedly mounted to a hollow shaft of a golf club, and a substantially identical lower grip, interchangeably mountable with the upper grip, and rotatable relative to the upper grip and the shaft. A selection of lower and upper mounting members which are interchangeable between the upper and lower grips are provided to accommodate a variety of sizes and shapes. A top mounting member encloses the top openings of the upper grip and shaft, is coupled to the upper grip at an annular recess, and is coupled to the inner surface of the hollow shaft at a plug comprising engaging surfaces. A user generally places a substantial portion of one hand on the rotatable lower grip and the other hand on the fixed upper grip. Upon swinging the club and hitting a ball, the lower grip, and thus the one hand, rotates relative to the upper grip and club shaft.