Reggie Jackson was a notable star who has distinctively different signatures based on where arend when. I no longer have exemplars but when I was a kid getting in person autos I saw them all.
When he sat in his car and signed you got a nice full Reggie Jackson signature. If he signed on the run you got a RegJack or Reggie J scribble.
Also seems that post 1990 or so a tendency for players to shorten their signatures over time. For example Cal Ripken Jr started out signing his full name with nearly every letter visible...these days one is likely to get CalRiJ
Gretzky had a really nice signature for many years but most of his retirement IP sigs I've seen are a mess.
I know useless without pictures but I sold off much of my collection and the rest is in storage.
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