I been trying to find a known authentic example for comparison and I'm surprised of the limited amount of items on Ebay. Lofton used to sign for hours after every game but rarely signs anymore and when he does he will only sign promotional cards. He used to sign his initials KL to shorten his signature because he would stay until he signed for everyone.

The following baseball example is all I could find and I don't know whether it's a genuine example. I found it on Sportsmemorabila.com