JSA, really?! Come on

[Runscott]

Originally Posted by MikeKam

Agreed.

To me it's the same as Honus Wagner signatures. His signature was quite elaborate when he was younger but deteriorated with age, yet I feel many here are confident in identifying a later in life Wagner signature.

Yes, and if you look at PSA's site, you'll see exemplars of Wagners "deteriorated" signature - same for any player whose signature changed drastically. They are common knowledge. Not so for this Koufax example.