Abstract: A process for making a golf ball includes steps of: a) providing a spherical hollow core which is made from a deformable resilient material, which defines a central chamber, and which includes left and right hemispherical bodies with contiguous circular surfaces having separated upper segments movable away from each other to permit placement of a sensing assembly into the central chamber, b) molding an intermediate shell layer at an elevated temperature that is lower than a softening point of the deformable resilient material to enclose the spherical hollow core, and c) molding a cover to enclose the intermediate shell layer.