30-Day Baseball Card Challenge Day 4

"A rookie card of one of your favorite players." I guess I could have found a rookie card of another guy I've really liked over the years, like Pagliarulo, Sierra, Soriano or Teixeira. But I am going to stick with Mattingly here because all of his cards are so iconic. I don't know for sure if I would say he is my favorite player, but he is my favorite player to get cards of.