i find this extremely interesting
Football Playing Card Autographs
So a few years ago, I found these playing cardsin a local Ann Arbor store:
Naturally I had to have a couple packs. It has M greats from all era's; pre-Yost to Braylon. As they were sitting on my shelf, I thought about what to do with them, and decided I'd like to get the entire pack framed in a huge case someday, and that it would be really cool to get some autographed. So I found as much contact info as I could about guys who are alive, mostly in NFL, and mailed cards out. Here is what I got back:
The Harbaugh card is my most prized, as he was my hero as a little kid learning about Michigan Football......but the best response I got was from John Navarre, who actually wrote me a letter in return. At this time, he is in his first or second year with the Arizona Cardinals:
"could you send me some more of these cards or possibly the whole deck. my wife loves them"
I bought another pack and sent if off to him.
Desmond Howard, Jon Jansen, Charles Woodson, Chris Perry, Brian Griese, Braylon Edwards, Ty Law, Tom Brady(but their PR person sent a packet of Patriots stuff)