I always reference this signed rookie card of Ryne Sandburg when I talk about ugly signatures and sloppy signers. I got this one circa 1984/85 at a card show. I actually paid for this crap. Not only was the ink in his pen dry, he decided to skip on his full name. In fact, I don't remember anybody behind me in line, so I don't know why the sloppy rushed signature. I've never liked him after this.
I remember Reggie Jackson had a similar "R-J" sloppy signature, but at least he was in a rush. Sandberg was sitting pretty bored at the signing table when he did this to my card.