2012 Leaf History of Baseball is a card set produced and distributed by Leaf Trading Cards. The lone series set was a high end lottery ticket with 997 cards in the set and each serial numbered, some as low as 1/1 and as high as /687. Although players like Babe Ruth and Don Mattingly were included, a collector was much more likely to get a Chris Sabo or a Bret Boone level player.