This Herschel Walker card just recently popped up on EBay and I was able to snag it for the Hoard. The card is from the 2013 Fleer Retro set. It is an E-X Century Essential Credentials Now #27. There is also an Essential Credentials Future version, which I already have.
The interesting thing is that the Futures version of the card is serial numbered to 16, while this "Now" version is serial numbered to 27. However it took me much longer to find this card. As can be seen on the lower center of the reverse of the card, this example is the 27th out of 27 made.
The card image was, of course, uploaded to the TCDB, as I try to fill in as many blank spots as possible on Walker's page.