In 2008, I mailed Sandy Koufax a 1955 Topps card in the hopes that he would sign it. After three stressful weeks, Mr. Koufax returned the card to me and included a beautiful autograph. This experience got me hooked on collecting signed rookie cards of baseball legends. I now have at least one example of every post-WWII signed Hall of Fame rookie card. The stigma that was once, and still is to some extent, associated with getting valuable cards signed has led to some surprisingly difficult examples to track down. Examples of players who are hard to find on signed rookie cards include Hal Newhouser, Richie Ashburn, Eddie Mathews, Hoyt Wilhelm and Willie Stargell. These players all have very expensive, short-printed rookie cards and also passed away just before obtaining signatures on rookie cards became popular. In addition to Hall of Famers, I am also adding signed rookies of players who have made significant contributions to the game, or who have a decent chance of being inducted in the future.