You're right about a wall rack, ren. WGT could add a wall rack based on hpurey's design above adding four more rows so it holds 50 balls. Players could drag a ball to a slot on the rack and the rack could be displayed as part of either awards, stats or a separate tab on the player's profile page.
They could sell the racks in the pro shop under the accessories tab.
Thanks for putting together that nice display, hpurey. Very nice visual collection.