There are unwritten rules for autographs apparently.
A friend of mine’s son (Jason Tyner) played for the Twins Mets and Devil Rays. His dad was telling me he would sign whatever they received at the clubhouse but kept anything he received in the mail and gave away to local kids. I was astonished. Jason is a nice kid but that is a crappy thing to do. Some 10 year old kid may not know the rules and some other kid gets his baseball card.
But some players are happy to accommodate the fans.
Nolan never got too big for his britches and that (along with his peerless achievements) separates him from the chaff.