In my personal opinion, game-used ball or base cards are about as useless as a manufactured lettermen patch, with a few exceptions, of course. However, this card is not one of those exceptions. In 2000, Upper Deck inserted game-used ball cards at a rate of 1 in every 287 packs. The cards are approximately 1/8 of an inch thick and each piece is from a “ball used in an official Major League game” and has no personal connection with the depicted player. Like I said earlier, not all base or ball cards have this trait. 2000 UD HoloGrFX Piece of the Series and 2004 Donruss World Series Souvenirs cards actually feature relics from games/series that the depicted player actually participated in.
Altogether, there are ten players on the checklist of UD’s inaugural game-ball set:
Ken Griffey, Jr.