One of my earliest through the mail autograph requests was to Len Rohde, a former offensive tackle for the San Francisco 49'ers. Rohde had an excellent 15 year career, but had moved into the restaurant business. I found out he owned a couple Burger King restaurants and I sent him a note to one of them.
Rohde responded very quickly, returning my card signed. He also included a business card which entitled me to have a Whopper on him at one of his BK locations. I thought that was the coolest thing. Of course, I never would have cashed in that coupon, because it was worth more to me than the price of a Whopper.
Also notable is the card I sent was pretty badly off center, as you can see from the picture below. This was in the days before the internet and before I knew about AU Sports. The only singles cards I had were ones I bought from packs over the years. Now, I would have gotten a better card to send, but no big deal. As a teen age novice autograph collector, I was very happy with the outcome.