30 Day Baseball Card Challenge - Day 4

Day 4, a rookie card of one of your favorite players.  This was tough, because I have many favorite players.  I decided to choose a card of a player who didn't fit one of the other challenge day criteria.  I didn't want a 30 day challenge of mostly Eric Hosmer cards!  This was a card I desperately wanted when I was a kid.  I still collect McGwire cards, especially the years where I wasn't collecting.