I have an autograph from all but 2 members of the '61 Yankees - Maris and Elston Howard. Mostly on baseball cards. In the 80's MLBPA produced an "alumni" address book. I knew someone with one, and send cards with a letter asking for an autograph and with return envelops. Got everyone but Mantle and Berra doing that. Met Mantle at a card show, and got Berra on a '80 Yankees signed team ball (includes Reggie and Winfield)