Need help with a ball auto
 

I have had this for some time (2011) and can't figure out who this one is:
Others are Joe Girardi Ron Santo Greg Maddux Lou Brock Jim Frey Ryne Sandberg. It is PSA DNA Q00641 but all it says id Lou Brock plus.

Appreciate any help.

The one below Ron Santo? Appears to be Greg Maddux to me, although I realize you listed him already. Maybe signed more than once?

That is a distinct possibility or may be this auto I thought was Maddux is someone else? Thanks.

That appears to be Mike Harkey

Thanks for all the help. This is a strange ball indeed as it has Jim Frey, Lou Brock, Greg Maddux, Joe Giradi, Ron Santo, Mike Harkey and Ryne Sandberg sigs on it. Figure it must have been some event in Chicago or Chicago area.

Once again the Net54 folks have come through for me and I really appreciate it.