MLB Memorabilia MLB Player Plaques and Collages – Each of these collectibles comes designed with photographs of the player and an actual piece of game-used baseball from a New York Mets game. The piece of baseball was obtained under the auspices of the MLB Authentication Program and can be verified by its numbered hologram at MLB.com. It is framed in black wood and officially licensed by Major League Baseball. The product measures 15″” x 17″” x 1″” and is ready to hang in any home or office..