Wezen-Ball: The Back of Your Baseball Cards

"For many of us, the introduction to baseball statistics came not through reading magazines (or Baseball Prospectus) or watching games on television, but through our favorite childhood hobby, baseball cards. When you're a card collector as a kid, you're constantly handling your cards, memorizing the faces and poses on the front, and poring over the numbers on the back. Brilliant players like Barry Bonds or Mike Schmidt are obvious even to seven year old kids when compared to the more pedestrian players that make up the bulk of the set."
Baseball Prospectus