 Hobby publication Beckett gave the 2001 Upper Deck Golf card a rookie card designation despite its arrival five years after the SI Kids release, sparking controversy.The market, it appears, gives far greater credence and value to the 1996 Sports Illustrated for Kids release which sells for exponentially more.As it remains, there is no formal definition of a "rookie card," though some players do have cards that are considered "rookies" by all.